Готові списки джерел за темами / Coal Sulfur content China

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Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Coal Sulfur content China"

Xu, Bo Hui, Shu Li Ding, and Dong Wang. "The Distribution Characteristics of Total Sulfur Content of Coals Formatting in Different Geological Age, Guangxi Province, China." Advanced Materials Research 788 (September 2013): 486–89. http://dx.doi.org/10.4028/www.scientific.net/amr.788.486.

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The era distribution characteristics of total sulfur content of coals formatting in Early Carboniferous, Later Permian, Early Jurassic and Cenozoic in Guangxi,China, were studied by basing the statistics and analysis of total sulfur content of 19 important coals producing area including 173 exploration area and mining area. The results show that the coals of Early Carboniferous are mainly high sulfur coal and sub-high sulfur coal and the total sulfur content is high around the centered area around Liucheng Guilin - Xinan area and gradually decrease along south and north sides. The sulfur content of Late Permian coals are very high and reach to 5%-8% in some area and there is great difference among sulfur content in different area. The sulfur in Early Jurassic coals have great difference in distribution and are up to 10% in Northeast Guangxi area but less than 0.5% in Southeast Guangxi area. The coals of Cenozoic are low sulfur coal in common.

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Su, Yinjiao, Xuan Liu, Yang Teng, and Kai Zhang. "A Preliminary Study on Dependence of Mercury Distribution on the Degree of Coalification in Ningwu Coalfield, Shanxi, China." Energies 14, no. 11 (May 27, 2021): 3119. http://dx.doi.org/10.3390/en14113119.

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Mercury (Hg) is a toxic trace element emitted from coal conversion and utilization. Samples with different coal ranks and gangue from Ningwu Coalfield are selected and investigated in this study. For understanding dependence of mercury distribution characteristics on coalification degree, Pearson regression analysis coupled with Spearman rank correlation is employed to explore the relationship between mercury and sulfur, mercury and ash in coal, and sequential chemical extraction method is adopted to recognize the Hg speciation in the samples of coal and gangue. The measured results show that Hg is positively related to total sulfur content in coal and the affinity of Hg to different sulfur forms varies with the coalification degree. Organic sulfur has the biggest impact on Hg in peat, which becomes weak with increasing the coalification degree from lignite to bituminous coal. Sulfate sulfur is only related to Hg in peat or lignite as little content in coal. However, the Pearson linear correlation coefficients of Hg and pyritic sulfur are relatively high with 0.479 for lignite, 0.709 for sub-bituminous coal and 0.887 for bituminous coal. Hg is also related to ash content in coal, whose Pearson linear correlation coefficients are 0.504, 0.774 and 0.827 respectively, in lignite, sub-bituminous coal and bituminous coal. Furthermore, Hg distribution is directly depended on own speciation in coal. The total proportion of F2 + F3 + F4 is increased from 41.5% in peat to 87.4% in bituminous coal, but the average proportion of F5 is decreased from 56.8% in peat to 12.4% in bituminous coal. The above findings imply that both Hg and sulfur enrich in coal largely due to the migration from organic state to inorganic state with the increase of coalification degree in Ningwu Coalfield.

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Yang, Yu, Luo Yang, Peng Fei Hu, and Gai Mei Ren. "Desulfurization Experimental Study on Flotation for High Sulfur Coal from Liupanshui, Guizhou Province, China." Advanced Materials Research 1092-1093 (March 2015): 825–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1092-1093.825.

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The total sulfur rate of the coal sample was 4.973%, the inorganic sulfur content was more than 60%, which was the main component in the coal sample. The effect of grinding fineness, flotation pulp density, collector and frother on coal flotation desulfurization were investigated in this paper to remove the inorganic sulfur. The results showed that it reached to the optimum desulfurization rate 54.7% when the optimum grinding fineness was 39.20% -200 mesh rate, pulp concentration was 80 g/L, kerosene consumption was 1.4 kg/t, 2#oil loading was 100 g/t, and the total sulfur content reduced to 2.72%. The optimized flotation condition determined by orthogonal experiments was as follow: pulp density for 60 g/L, kerosene dosage of 1.4 kg/t, 2#oil consumption of 100 g/t. In this case, total sulfur content reduced to 2.19%, the total desulfurization rate and the inorganic desulfurization rate were 55.96% and 92.89%, respectively.

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Li, Jing, Peng Wu, Guanghua Yang, Lei Pan, Xinguo Zhuang, Xavier Querol, Natalia Moreno, Baoqing Li, and Yunfei Shangguan. "Enrichment of Li–Ga–Zr–Hf and Se–Mo–Cr–V–As–Pb Assemblages in the No. 11 Superhigh Organic Sulfur Coal from the Sangshuping Coal Mine, Weibei Coalfield, Shaanxi, North China." Energies 13, no. 24 (December 17, 2020): 6660. http://dx.doi.org/10.3390/en13246660.

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Superhigh organic sulfur(SHOS) coals have currently attracted great attention due to their typical depositional environments and formation history as well as their great negative impact on the ecosystem. This study investigated the geochemistry of the No. 11coalof the Late Carboniferous Taiyuan Formation from the Sangshuping coalmine, Hancheng miningarea, Weibei coalfield, Shaanxi, North China. The No. 11 coal is a high-sulfur coal with a large proportion of organic sulfur content (3.7 to 5.5%, avg. 4.4%) and belongs to typical SHOS coal. The high sulfur content in the Sangshuping coal mine has been mainly caused by the combined influences of seawater and hydrothermal fluids. The SHOS in No. 11 coal was formed in the Fe-poor and S-rich high-marine influenced occlusive environment. During the late coalification stage, a high proportion of pyritic sulfur was formed due to sufficient Fe supply from the Fe–S-rich epigenetic hydrothermal fluids. The No. 11 SHOS coal is enriched in Li–Ga–Zr–Hf and Se–Mo–Cr–V–As–Pb element assemblages. The sediment provenance of the Sangshuping coal mine is predominantly felsic–intermediate rocks from both the Yinshan and Qinling Oldland. However, the elevated concentrations of critical elements (Li, Ga, Zr, and Hf) in the No. 11 coal are primarily inherited from the Yinshan Oldland. The enrichment of the Se–Mo–Cr–V–As–Pb assemblage in No. 11 coal can be ascribed to the influence of both seawater and epigenetic hydrothermal activity.

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Zhao, Qiao Jing, Yue Gang Tang, Xiu Jie Deng, and Xiao Lei Yu. "Geochemistry of Sulfur in Extract from Hedong Coal Mine, China." Advanced Materials Research 734-737 (August 2013): 89–94. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.89.

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The organosulfur compounds in the extract of the unusually organic sulfur rich of Hedong coal mine had been identified by gas chromatography and mass spectrometry. There are two series organosulfur compounds (OSC) were detected in the extract, they are benzonaphthothiophen and dibenzothiophene and the content of methylbiphenyl is overwhelming advantages in the biphenyl series. It demonstrates that the coal was formed in alkaline environment. The coal was formed in a reduction environment generally but there are exceptions, the samples HD9-2 and HD10-13 which have the value of Pr/Ph was 3.52 and 4.05 and So/St in sample HD9-2 was 78.82%, 73.08% in sample HD10-13 respectively . It show that the coal suffer strong oxidation and there are no good correlation between the content of organic sulfur and the oxidation environment.

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Gao, Wei, Qing Cai Liu, Cun Fang Lu, Jian Yang, Juan Wen, and Hui Min Zheng. "Sulfur-Loading Impact on Microstructure and Surface Morphology of Fly Ash-Based Adsorbent for Mercury Removal." Advanced Materials Research 148-149 (October 2010): 1511–17. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1511.

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Mercury is a toxic air pollution, and coal-fired utility plants are the largest anthropogenic emission source in China. Due to rapidly decreasing the cost and increasing the efficiency, it is becoming necessary to develop alternative technologies/materials for mercury removal. The adsorbents made from fly ash of coal-fired, and became spherical after sintering at temperature 500 . Finally, it has been treated by thermal precipitation sulfur, to remove mercury in fuel gas of coal-fired. High temperature deposition furnace was applied to increase sulfur content in fly ash based adsorbents produced in lab. SEM, BET, TGA and other measurement methods were used to characterize the surface morphology, sulfur distribution and specific surface. The experiments can increase its sulfur content of adsorbent, and the study found that sulfur attached to the surface, mesopore structure, microporous structure of fly ash-based adsorbents. So these treatments can increase their surface area and enhanced their adsorption capacity, while the sulfur was filled in interspace as small molecule S2 and S5. And the specific surface area increased by sulfur-loading and increasing temperature.

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Wang, Hua, Mei Li Du, and Guo Tao Zhang. "Concentration and Distribution of Cr, Pb and Zn in the Jurassic Coals from Northern Shaanxi and Ningxia, China." Advanced Materials Research 989-994 (July 2014): 1415–18. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1415.

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The concentration and distribution of Cr, Pb and Zn in 22 Jurassic coals from northern Shaanxi,and Ningxi, China were studied. The samples were collected from eight coal mines of five different region, including Yuyang Region, Hengshan, Shenmu, Huangling and Lingwu. Comparing with Chinese coals, American coals and coal Clarke value: Pb showed different degree enrichment in the study region except Ningxia ; Cr was enriched in Shenmu coals, Huangling coals and Hengshan coals; whereas the content of Zn in the study region coals was lower than in American coals. Horizontal variation of the three elements in the study region indicated that different elements showed different variation trend. Based on statistical analyses, Pb showed a moderate relationship with ash yield, whereas Cr had a high correlation coefficients with total sulfur.

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Kang, Jian, Zhi Juan Kang, and Hai Yue Shan. "Abundance of Rare Earth Elements and Yttrium in Coals from the Guanbanwusu Mine, Jungar Coalfield, Northern China, and their Geological Implication." Advanced Materials Research 962-965 (June 2014): 152–55. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.152.

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Inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the concentrations of rare earth elements and yttrium (REY) in coal and associated rock samples from the Guanbanwusu Mine, Jungar Coalfield, Northern China. The Guanbanwusu coals have a similar vitrinite reflectance and sulfur content, and a slightly higher ash yield. The concentration of REY (from La to Lu plus Y) in the 6 coal of the Guanbanwusu Mine varies from 72 μg/g to 396 μg/g and averages 186 μg/g, higher than that in normal Chinese coal (136 μg/g) and much higher than that in average world hard coals. The H-type distribution patterns in the No. 6 coal (W9-2 and W9-9) were probably caused by stronger water influences than those in the other coalfield. The coal bench (W2 and W9) with L-type is because terrigenous input influence.

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Yu, Jiang Long, Fang Rui Meng, Xian Chun Li, and Arash Tahmasebi. "Power Generation from Coal Gangue in China: Current Status and Development." Advanced Materials Research 550-553 (July 2012): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.443.

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This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low thermal power plant efficiency are the two major problems for the power industry firing coal gangue. Particulate matter emission control is a problem due to the high ash content. Sulfur emissions from these units are easily controlled mostly through lime/limestone injection and in-situ capture. Overall, efficient power generation using coal gangue is a promising approach to reduce the use of coal resources and reduce the environmental impacts.

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Ma, Jialiang, Bangjun Liu, Ke Zhang, Zhenzhen Wang, Jinxiao Li, Maksim G. Blokhin, and Cunliang Zhao. "Geochemical characteristics of No. 6 coal from Nanyangpo Mine, Datong coalfield, north China: Emphasis on the influence of hydrothermal solutions." Energy Exploration & Exploitation 38, no. 5 (April 26, 2020): 1367–86. http://dx.doi.org/10.1177/0144598720922309.

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This paper discusses the volcanic influence on the mineralogical and elemental geochemistry of No. 6 coal from Nanyangpo Mine in the Datong coalfield, north China. Sixteen samples (14 coal and 2 partings) were analyzed by different geochemical methods. The results revealed that the No. 6 coal is a medium–high volatility, highly calorific, bituminous coal with a low-ash and medium-sulfur content. The minerals mainly consisted of kaolinite, calcite, dolomite, and pyrite. In addition, traces of apatite, sphalerite, and anatase were also found. Calcite, dolomite, and pyrite in the coal samples were mainly derived from epigenetic hydrothermal solutions, whereas kaolinite and apatite originated from volcanic ash. Harmful trace elements including Pb, Cu, Mo, Tl, and Hg in the No. 6 coal samples were higher than those of common global coals. These harmful elements mainly occurred in sulfide minerals, which were probably influenced by hydrothermal inputs.

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Дисертації з теми "Coal Sulfur content China"

BARUA, SUKHENDU LAL. "APPLICATION OF CONDITIONAL SIMULATION MODEL TO RUN-OF-MINE COAL SAMPLING FREQUENCY DETERMINATION AND COAL QUALITY CONTROL AT THE POWER PLANT (BLENDING, GOAL PROGRAMMING, MICROCOMPUTER)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187940.

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Run-of-mine (ROM) coal sampling is one of the most important factors in determining the disposition of ROM coal for an overall emission control strategy. Determination of the amount of sample, or still better, the frequency of ROM coal sampling is thus essential to the analysis of overall emission control strategies. A simulation model of a portion of the Upper Freeport coal seam in western Pennsylvania was developed employing conditional simulation. On the simulated deposit, different mining methods were simulated to generate ROM coal data. ROM coal data was statistically analyzed to determine the sampling frequency. Two schemes were suggested: (1) the use of geostatistical techniques if there is spatial correlation in ROM coal quality, and (2) the use of classical statistics if the spatial correlation in ROM coal quality is not present. Conditions under which spatial correlation in ROM coal quality can be expected are also examined. To link the ROM coal and coals from other sources to coal stockpiles and subsequently to solve coal blending problems, where varying qualities of stockpiled coals are normally used, an interactive computer program was developed. Simple file-handling, for stockpiling problems, and multi-objective goal programming technique, for blending problems, provided their solutions. The computer program was made suitable for use on both minicomputer and microcomputer. Menu-driven and interactive capabilities give this program a high level of flexibility that is needed to analyze and solve stockpiling and blending problems at the power plant.

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Книги з теми "Coal Sulfur content China"

A, Attia Yosry, ed. Processing and utilization of high sulfur coals. Amsterdam: Elsevier, 1985.

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C, Cobb James. Sulfur in Kentucky coal and the clean air act amendments of 1990. Lexington: Kentucky Geological Survey, University of Kentucky, 1992.

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Derda, Małgorzata. Izotopy siarki w przyrodzie: Metodyka oznaczania stosunków izotopowych siarki w węglu i ropie naftowej metodą spektrometrii masowej. Warszawa: Instytut Chemii i Techniki Jądrowej, 1999.

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Hackley, Keith C. Study of sulfur behavior and removal during thermal desulfurization of Illinois coals. Champaign, Ill: Illinois State Geological Survey, 1990.

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Harvey, Richard D. Characterization of organic sulfur in macerals and chars. Champaign, Ill: Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey, 1992.

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Harvey, Richard D. Characterization of the organic sulfur in macerals and chars. Champaign, Ill: Illinois State Geological Survey, 1990.

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Demir, Ilham. Characterization of available (marketed) coals from Illinois mines. Champaign, Ill: Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey, 1994.

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International Conference on Processing and Utilization of High Sulfur Coals. (5th 1993 Lexington, Ky.). Processing and utilization of high-sulfur coals V: Proceedings of the Fifth International Conference on Processing and Utilization of High-Sulfur Coals, October 25-28, 1993. Amsterdam: Elsevier, 1993.

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International Workshop on Current and Future Plant Nutrient Sulphur Requirements, Availability, and Commercial Issues for China (1995 Beijing, China). Proceedings of the International Workshop on Current and Future Plant Nutrient Sulphur Requirements, Availability, and Commercial Issues for China, March 9, 1995, Beijing, China. [Washington, DC]: The Institute, 1995.

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International Conference on Processing and Utilization of High Sulfur Coals. (1st 1985 Columbus, Ohio). Processing and utilization of high sulfur coals: Proceedings of the First International Conference on Processing and Utilization of High Sulfur Coals, October 13-17, 1985, Columbus, Ohio, U.S.A. Amsterdam: Elsevier, 1985.

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Частини книг з теми "Coal Sulfur content China"

Wang, Xuebin, Hongying Wu, Shuanghui Deng, Lan Zhang, Bo Wei, and Houzhang Tan. "A Mechanism Study on the Decomposition of Sulfate in Zhundong Coal with High Sulfur Content in Coal Ash." In Clean Coal Technology and Sustainable Development, 101–6. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2023-0_14.

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"Pollution Control." In Environmental Toxicology, edited by Sigmund F. Zakrzewski. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195148114.003.0017.

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Coal is now used mainly as fuel for the production of electricity. Worldwide about 28% of commercial energy production depends on coal. In the United States it is about 31% and in some coal rich but oil poor countries such as China, Germany, Poland and the Czech Republic the figures are 73%, 56%, 95% and 86%, respectively (1). Because of the ample supply of available coal, dependence on coal as an energy source will probably remain high for some time to come. However, coal is the most polluting of all fuels; its main pollutants are sulfur dioxide and suspended particulate matter (SPM). Depending on its origin, coal contains between 1 and 2.5% or more sulfur. This sulfur comes in three forms: pyrite (FeS2), organic bound sulfur, and a very small amount of sulfates (2). Upon combustion, about 15% of the total sulfur is retained in the ashes. The rest is emitted with flue gases, mostly as SO2 but also, to a lesser extent, as SO3. This mixture is frequently referred to as SOx (2). The three basic approaches to the control of SOx emission are prepurification of coal before combustion, removal of sulfur during combustion, and purification of flue gases. The first approach, referred to as a benefication process, is based on a difference in specific gravity between coal (sp gr = 1.2–1.5) and pyrite (sp gr = 5). Although the technical arrangements may vary, in essence the procedure involves floating the crushed coal in a liquid of specific gravity between that of pure coal and that of pyrite. Coal is removed from the surface while pyrite and other minerals settle to the bottom. Coal benefication can reduce sulfur content by about 40% (2). Although gravity separation is presently the only procedure in use, research was initiated on microbial purification of coal. A research project conducted by the Institute of Gas Technology, with funding from the U.S. Department of Energy, was aimed at the development of genetically engineered bacteria capable of removing organic sulfur from coal. Inorganic sulfur can be removed by the naturally occurring bacteria Thiobacillus ferrooxidans, Thiobacillus thiooxidans, and Sulfolobus acidocaldarius (3).

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Oliazadeh, M., A. R. Shahverdi, M. Tabatabaei, and M. Sanati. "Microbial desulfurization of a high content sulfur coal." In Mining Science and Technology, 617–22. CRC Press, 2004. http://dx.doi.org/10.1201/9780203022528-119.

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Tabatabaei, M., M. Oliazadeh, A. Shahverdi, and M. Sanati. "Microbial desulfurization of a high content sulfur coal." In Mining Science and Technology, 617–21. Taylor & Francis, 2004. http://dx.doi.org/10.1201/9780203022528.ch119.

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Schobert, Harold. "Environment." In Rethinking Coal, 120—C9.P96. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780199767083.003.0009.

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Abstract Any strategy for using coal for electricity generation has potentially significant impacts on the environment if steps are not taken to minimize emissions. Acid rain results from emissions of sulfur and nitrogen oxides produced during combustion. Reducing the sulfur content of the coal before it is burned or capturing sulfur oxides before they can be released are both helpful steps. Tiny ash particles suspended in the flue gases are captured by electrostatic precipitators or in baghouses. The hazardous trace element mercury can be controlled by adsorbing mercury vapors on activated carbon. A coal-fired power plant has greatly reduced emissions compared to plants of even a few decades ago. Because the dominant element in all coals is carbon, coal-fired plants will continue to emit large quantities of carbon dioxide. The carbon dioxide problem is the source of much of the pressure to reduce or eliminate the use of coal in electricity generation.

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Schobert, Harold. "Preparation." In Rethinking Coal, 85—C7.P72. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780199767083.003.0007.

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Abstract Most coals require one or more treatment operations to convert the coal as it came from the mine into a product of consistent quality that satisfies the specifications for its use. Coals can be prepared for use by one or more strategies. Size reduction of as-mined pieces produces material segregated into various size ranges. Coal cleaning reduces the amount of ash-forming inorganic constituents, decreasing the amount of ash to be handled when the coal is used. Removal of pyrite provides a way to reduce sulfur oxide emissions from combustion. Drying or dewatering reduces moisture content. None of the coal preparation operations destroys the unwanted components; they must be dealt with separately. Prepared coal often needs to be stored or stockpiled before it is used. For some coals, storage can lead to the problem of “spontaneous” combustion.

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Ge, Hui, Weixing Wang, Lichun Huang, Mingxing Tang, and Zhenyu Ge. "The Relation of Ni/ZnO Nano Structures With Properties of Reactive Adsorption Desulfurization." In Nanocomposites for the Desulfurization of Fuels, 134–67. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2146-5.ch005.

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Ni/ZnO nano-sorbent systems have been extensively used in the reactive adsorption desulfurization (RADS) of gasoline steams, especially in China, to meet the more rigorous regulation on the sulfur content. The apparent advantage of RADS is that most of the olefins are kept in the product with low consumption of hydrogen and little loss of octane. The authors discussed in this chapter the relation of catalytic properties with components and structures of Ni/ZnO sorbent. Based on detailed characterization and reaction results, they revealed the dynamic change of Ni/ZnO sorbents during RADS, the mechanisms of desulfurization, and the sulfur transfer and sulfur adsorption. Apart from the RADS of Ni/ZnO nano-sorbent for cleaner gasoline production, they also presented other potential applications.

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Flath, David. "Industrial Policy." In The Japanese Economy, 251–81. 4th ed. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192865342.003.0010.

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Abstract This chapter describes and evaluates Japanese industrial policy from the Meiji era to the twenty-first century. It begins with a basic definition of industrial policy—essentially industrial targeting—and lays out the arguments supporting such a policy. Some of the widely invoked criteria for industrial targeting are specious such as having high value-added or high value-added per worker, but others are not. The valid criteria include contribution to national defense, Marshallian externality, coordination failure, and possibilities for collecting oligopoly rent from foreign trade. The chapter goes on to detail the content of Japanese industrial policy from the mid-nineteenth century to the present day—what industries were targeted and what policy tools were used. Early instances of industrial policy can be discerned in the Meiji model factories, government enterprises, subsidies of coastal shipping, and government banks. But it was not until the outbreak of war with China in 1937 that Japan attained a comprehensive industrial policy that amounted to a controlled system for shifting resources toward the production of munitions. The wartime controls survived into the Occupation Period but ended with the Dodge line only to resurface after the occupation ended. The ensuing “high-growth” period, 1953–1964, was the zenith of Japanese industrial policy, in which MITI played the lead role in allocating foreign exchange, controlling access to subsidized loans, and awarding tax credits and antitrust exemptions. These policies targeted coal mining, steel, shipbuilding, and petrochemicals—politically influential industries that contributed little to Japan’s economic growth and development.

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"Evidence of corrosion in home piping system began to appear in fixture stains and metallic taste. In 1985, the Federal Government did surveys of heavy metals in water supplies, focusing on lead in drinking water and its effect on children. The prevalence of this metal resulted in the banning of lead from solder used in plumbing. In 1988, and in 1989, regulations reduced the safe limit of lead in water from 50^gm/L to 5 μgm/L, with an action level at 15pgm/L in a first draw sample. At the same time the E.P.A. provided guidance documents to schools and day care centers to help reduce children's lead exposure in water supplies. Grants were made available to states to be used for spreading the knowledge about this danger. However, the Federal regulations applied only to public water supplies, which were defined as systems serving 25 or more people. But private wells serving family homes, many containing children, were not included. Children could be assured of regulated water supplies in school, but not at home. Aware that lead was a problem in paint chips, Connecticut required that pediatricians test for traces of lead in children at age two. The Federal act recognized that the primary source of lead in water supplies came through home plumbing systems stemming from the corrosion by the water. This was remedied by requiring public water supplies to prevent corrosion, usually by adding alkalinity to the water. Here again, private wells not included in the educational phase of the program were also not included in the remedies. While these activities with water supplies were occurring, a phenomenon of a different sort was originating in states hundreds of miles away from Southeastern Connecticut. Throughout the Midwest and into West Virginia and Kentucky, electric power generators were erecting tall stacks to disperse sulfur dioxide gasses high into the atmosphere. The gas came mostly from the burning of high sulfur coal mined nearby. The Federal air pollution standards for ambient air were being met in the Midwest by the use of these tall stacks. In the eastern states, restrictions on sulfur content of fuels, mostly petroleum based, were used to meet the ambient air standards. By the early 1980's Connecticut eased its restrictions on sulfur content in these fuels from 0.5% to 1% by weight . Still, during the next five years the sulfur dioxide level actually decreased. However, in 1986, other data collected by the State showed that 32% of the rain storms had an acidic pH of 4.0 or below [ 1 ]. The lowest pH ’ s recorded that year were 3.6. The State also reported that from 1985 to 1996 there had been a further decrease in ambient sulfur dioxide levels [ 2 ]." In Hazardous and Industrial Waste Proceedings, 30th Mid-Atlantic Conference, 860. CRC Press, 2014. http://dx.doi.org/10.1201/9781498709453-139.

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Тези доповідей конференцій з теми "Coal Sulfur content China"

Widodo, Sri, Sufriadin, Meinarni Thamrin, and Khairul Alif. "Reduction of sulfur and ash content on Mallawa’s coal using flotation column method." In THE PROCEEDINGS OF THE 4TH EPI INTERNATIONAL CONFERENCE ON SCIENCE AND ENGINEERING (EICSE) 2020. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0095362.

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Wang, Wenfeng, Shuxun Sang, and Piaopiao Duan. "PARTITIONING OF TOXIC TRACE ELEMENTS DURING HIGH-SULFUR COAL PREPARATION FROM SOUTHWEST CHINA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-299837.

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Selc¸uk, Nevin, Yusuf Gogebakan, and Hakan Altindag. "Co-Firing of Steam Coal With High Sulfur Content Lignite in a Bubbling Fluidized Bed Combustor." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78067.

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Combustion and emission behavior of 100 % steam coal (SET 1) and a mixture of 80 % by weight steam coal and 20 % by weight local lignite, characterized by high sulfur and ash contents, (SET 2) were investigated in the 0.3 MWt Middle East Technical University (METU) Atmospheric Bubbling Fluidized Bed Combustor (ABFBC) Test Rig. Experiments were performed with limestone addition at various Ca/S molar ratios with fines recycle. In both sets of experiments, parameters other than Ca/S molar ratio were held as nearly constant as possible. On-line measurements of O2, CO2, CO, SO2, NOx emissions were carried out. Comparisons between the emissions show that lower NOx and SO2 emissions are obtained from combustion of steam coal/lignite mixture compared to those from steam coal only despite higher sulfur and almost equal nitrogen contents of the mixture. Calculated combustion efficiencies were found to be around 98 and 96 % for SET 1 and SET 2, respectively. As for the sulfur retention efficiencies, up to three times higher efficiencies were achieved when steam coal is co-fired with high sulfur lignite.

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Wojciechowicz, A., L. Buczkowski, S. Bednarczyk, J. Kowalewski, and M. Ziçba. "Possibility of Using VIS-NIR Spectroscopic Methods to Determine the Sulfur Content in Brown Coal." In 25th European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902483.

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Bilgin, Oyku. "Reduction of sulfur content in coal structure by chemical methods and investigation of test results." In 2018 2nd International Symposium on Multidisciplinary Studies and Innovative Technologies (ISMSIT). IEEE, 2018. http://dx.doi.org/10.1109/ismsit.2018.8567292.

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Murko, Vasily, Veniamin Khyamyalyaynen, Ekaterina Mikhaylova, Nadezhda Shikina, and Zinfe Ismagilov. "Development of Efficient Technologies for Abatement of Nitrogen and Sulfur Oxides in Flues Gases of Coal Combustion." In 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection". Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/coal-18.2018.62.

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Rokni, Emad, Hsun Hsien Chi, and Yiannis A. Levendis. "In-Furnace Sulfur Capture by Co-Firing Coal With Alkali-Based Sorbents." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65549.

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Over the last quarter of a century, since the 1990 US Clean Air Act Amendments were enacted the gaseous sulfur emission, in the form of sulfur dioxide, have been reduced [1] by a factor of 4, by switching to lower sulfur content coals, installation of flue gas desulfurization (FGD) sorbents or switching altogether to natural gas as a fuel. Penetration of alternative energy generation also has had a positive impact. However, current emissions of sulfur dioxide are still voluminous, amounting to 3,242,000 short tons annually in the USA [2]. As wet flue gas desulfurization is both real-estate- and capital-intensive, infurnace dry sorbent injection has been considered over the years to be a viable alternative. However there is still uncertainty on the best selection of the sorbents for particular coals and furnace operating conditions. This is particularly the case when it is economically attractive for the power-plant operator to burn locally-sourced high-sulfur coal, such as the case of Illinois bituminous coals. This manuscript presents experimental results on the reduction of sulfur oxide emissions from combustion of a high-sulfur content pulverized bituminous coal (Illinois #6 Macoupin). The coal particles were in the size range of 90–125 μm and were blended with dry calcium-, sodium-, potassium-, and magnesium-containing powdered sorbents at different proportions. The alkali/S molar ratios were chosen to be at stoichiometric proportions (Ca/S = 1, Mg/S = 1, Na2/S = 2, and K2/S = 2) and the effectiveness of each alkali or alkali earth based sorbent was evaluated separately. Combustion of coal took place in a drop-tube furnace, electrically-heated to 1400 K under fuel-lean conditions. The evolution of combustion effluent gases, such as NOx, SO2 and CO2 were monitored and compared among the different sorbent cases. The use of these sorbents helps to resolve the potential of different alkali metals for effective in-furnace sulfur oxide capture and possible NOx reduction. It also assesses the effectiveness of various chemical compounds of the alkalis, such as oxides, carbonates, peroxides and acetates.

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Zhang, Jinsong. "Study and Application Of Influencing Factors of Residual Gas Content in Falling Coal." In The 10th International Symposium on Project Management, China. Riverwood, NSW, Australia: Aussino Academic Publishing House, 2022. http://dx.doi.org/10.52202/065147-0080.

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Cheng, Leming, Zhongyang Luo, Zhenglun Shi, Haixiao Zheng, Qinghui Wang, Xiang Gao, Mengxiang Fang, and Chunjiang Yu. "Combustion Behavior and SO2, NOx Emissions of an Anthracite Coal in a Circulating Fluidized Bed." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78065.

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Combustion behavior and SO2, NOx emissions of anthracite coal in a circulating fluidized bed are reported in this paper. Experimental researches were done on a 1 MWt circulating fluidized bed facility with a 0.31 m × 0.31 m cross section and 11.2 m height combustor. The anthracite coal with 6.28% volatile and 3.76% sulfur content burns steadily during the test. The bed was operated under different temperature, Ca/S ratio and excess air. A limestone containing 75% CaCO3 and 15% MgCO3 was used as the sulfur sorbent. Results show that the SO2 emission varies with operating bed temperature and more than 90% sulfur capture efficiency can be reached while Ca/S is about 3. With Rosemount Analytical NGA2000, N2O, NO and NO2 were also measured in the test. It was found the majority content of NOx was NO and the least was NO2. Those NOx emissions change highly with the excess air number.

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Green, Leon. "Indirect Firing of Gas Turbines by Residual Coal-Water Fuel." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-168.

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Production of low-ash, low-sulfur coal-water fuel (CWF) will yield large quantities of high-ash but still low-sulfur “residual” CWF analogous to the residual fuel oil produced by petroleum refining. Relatively low in cost compared to the premium, low-ash CWF product, “resid” CWF will thus be available for in-plant industrial generation of conventional steam power or process heat. Due to its low sulfur content, however, a higher-value use of such a compliance fuel can be the indirect firing of gas turbines for the more efficient combination of power generation plus subsequent bottoming-cycle use or process heat applications (cogeneration). To limit NOx emissions, staged combustion will be required. Such operation can be accomplished starting with substoichiometric CWF reaction in “conventional” slurry burners followed by final combustion completed in the bottom region of a deep, intensely-mixed, fludized-bed heat exchanger. By virtue of the highly enhanced heat-transfer characteristics of the strongly-stirred bed of non-reactive particles, the normal limitation of rates of non-pressurized fire-side heat transfer is elevated. The fuel ash particles, milled fine by passage through the bed of refractory heat-transfer particles, are collected in a conventional baghouse. The conceptual design of such a combustion-driven, fluid-bed heat exchanger system fired by high-ash, residual coal-water fuel is outlined and its advantages over a conventional fluid-bed, solid-coal combustor for indirect firing of gas turbines are enumerated.

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Звіти організацій з теми "Coal Sulfur content China"

Chaparro, L. F. Automated microscopy methods for measuring pyritic sulfur content of coal and determining degree of liberation of pyrite in coal: Final report. Office of Scientific and Technical Information (OSTI), July 1987. http://dx.doi.org/10.2172/5665273.

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