Relevant bibliographies by topics / Coking inhibition

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Coking inhibition'

Author: Grafiati
Published: 9 March 2023
Last updated: 10 March 2023

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Journal articles on the topic "Coking inhibition"

1

Huang, Fang, Chun Jiang Yu, Qin Hui Wang, Meng Xiang Fang, and Zhong Yang Luo. "The Exploration and Practice of Using Additive to Inhibit the Heating Surface Deposition in Biomass-Fired Boiler." Advanced Materials Research 608-609 (December 2012): 411–18. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.411.

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In response to the deposition problem in biomass-fired boiler, inert addictive was tested to inhibit the possibility of coking. The deposition samples collected from final and primary superheater of biomass-fired CFB (circulating fluidized bed) boiler were grinded into fine powder. The inhibitive ability of additive was tested by mixing the deposition sample with different proportions of inhibitor under high temperature. By means of scanning electron microscope (SEM), X-ray diffraction (XRD) and other analytical procedures, the properties of the samples with inhibitor such as microstructure, composition were studied. The inhibitor was also introduced to the industrial biomass CFB boiler to verify its inhibition effect on superheater deposition. Unfortunately, the effect of adding inhibitor in industrial boiler is not certain, though the inhibitor added to the samples is obviously effective in weakening coking in the laboratory scope.
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2

Dong, Chun Juan, and Qing Ye Pan. "Kinetic Analysis for COD Removal in Actual Coking Wastewater through an Micro-Aerobic EGSB Reactor." Applied Mechanics and Materials 700 (December 2014): 455–59. http://dx.doi.org/10.4028/www.scientific.net/amm.700.455.

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Treatment of actual coking wastewater considered to be difficult by traditional systems. The present study is related to treatment of actual coking wastewater through microaerobic EGSB reactor. The study showed the EGSB reactor could attain about 75% high COD removal. IncreasingVupcould strength COD removal. Moreover, high sludge concentration and profound communal synergism existing within the dense granules were very important. As a result of the kinetic analysis of the EGSB reactor treating actual coking wastewater for COD removal using a modified Stover–Kincannon model, the maximum substrate utilization rate,vmax, half saturation constant,KS, inhibitor constant, KI, actual pollutant removal rate, , and the actual inhibition degree,KS/KIwere determined as 2.65×10-3h-1, 39.57mg.L-1, 415.82mg.L-1, 6.7×10-5h-1.mg-1.L and 0.1(before increasingVup), 7.34×10-3h-1, 19.53mg.L-1, 197.76mg.L-1, 3.7×10-4h-1.mg-1.L and 0.1(after increasingVup), and 9.35×10-3h-1, 6.38mg.L-1, 162.81mg.L-1, 1.47×10-3h-1.mg-1.L and 0.04 (after increasingVupand X), respectively. The inhibition of toxic contaminants in the actual coking wastewater would cause the decreasing of pollutant removal rate, however, enhancing and X (simultaneously optimizing sludge aggregate structure) could strengthen the performance effect.
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Bajus, Martin, and Jozef Baxa. "Coke formation during the pyrolysis of hydrocarbons in the presence of sulphur compounds." Collection of Czechoslovak Chemical Communications 50, no. 12 (1985): 2903–9. http://dx.doi.org/10.1135/cccc19852903.

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The effect of 1-butanethiol, 0,0'-di-1-butyl dithiophosphate zinc, 0,0'-diethyl dithiophosphoric acid and carbon disulphide, respectively, on the formation of coke during the pyrolysis of a reformer raffinate at 820 °C and 100 kPa was studied using a stainless steel tube flow-through reactor. The sulphur compounds were added in amounts of 0.05 to 5.0 wt.%. The coke formation was followed from the beginning of the experiment. The coking rate was lower as compared with the pyrolysis of the pure reformer raffinate; 0,0'-di-1-butyl dithiophosphate zinc, 0,0'-diethyl dithiophosphoric acid and carbon disulphide have a strong inhibiting effect on the coke formation. The coking inhibition mechanism is discussed.
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4

Dong, Chunjuan, and Bingnan Lv. "Granulation for Coking Wastewater Treatment in a Coupled Anaerobic-Aerobic Reactor." E3S Web of Conferences 38 (2018): 01052. http://dx.doi.org/10.1051/e3sconf/20183801052.

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A coupled anaerobic-aerobic granular bio-film reactor was employed with two operation stages: Stage I, granular sludge was formed from digestion sludge using brewery wastewater, and Stage II, granular sludge was acclimatized using coking wastewater. Two oxygenation methods (i.e. A and B) were employed to acclimatize the granules. For method A, dissolved O 2 was supplied through a continuous oxygenation way of 800-15000ml-min-1 . And for method B, dissolved O2 was supplied of 800-15000ml-min-1 18-12 times at 20-60min intervals, 1h each time. The experimental results showed that granules could quickly form in 10d in the EGSB reactor seeded with digestion sludge and little loose granules lack of nutrition, and it was the key factor for granules forming to add little loose granules. It took only about 6 months for granules acclimation using coking wastewater. Both oxygenation methods could run well when acclimatizing the granules. However, method A could have comparatively high and stable operation effect. The actual coking wastewater had distinct inhibition effect on the granules, but the supplement of some oxygen could promote the recovery of SMA, and NaHCO3 supplement could also weaken the inhibition effect of the CWW. Method A had more strongly activity recovery ability than method B.
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5

HIGASHINO, Kazuyuki, Masatoshi SUGIOKA, Takao KOBAYASHI, Ryojiro MINATO, Shunsuke OOYA, and Yousuke SASAYAMA. "Fundamental Study on Coking Inhibition for Regenerative Cooled LNG Rocket Engines." JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 58, no. 676 (2010): 138–45. http://dx.doi.org/10.2322/jjsass.58.138.

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6

Fedorak, Phillip M., and Steve E. Hrudey. "Inhibition of Anaerobic Degradation of Phenolics and Methanogenesis by Coal Coking Wastewater." Water Science and Technology 19, no. 1-2 (January 1, 1987): 219–28. http://dx.doi.org/10.2166/wst.1987.0203.

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Dilutions of a wastewater containing 410 mg/l phenolics (by 4-aminoantipyrine method) from a coal coking process were tested in anaerobic batch cultures to determine whether phenol degradation and subsequent methane production would occur. Phenol was degraded in cultures which contained < 30% (V/V) wastewater but no methane production could be attributed to the phenol degradation. Higher concentrations of the wastewater severely inhibited methane formation likely due to cyanide which was present in the wastewater at 8.3 mg/l. Exhaustive extraction at neutral pH with diethyl ether could not alleviate this inhibition, suggesting that it was not primarily due to non-polar organic compounds. Although the inclusion of 2500 mg/l activated carbon in the batch cultures improved the methanogenic fermentation, methane yields were still lower than expected for complete phenolic conversion.
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7

Hou, Huiqiao, Ruijie Li, Shilong He, Jun Huang, Wenkang Zhang, Zhiwei He, and Zhen Mao. "Inhibition characteristics of two-phase anaerobic system for real coking wastewater treatment." Journal of Water Process Engineering 50 (December 2022): 103247. http://dx.doi.org/10.1016/j.jwpe.2022.103247.

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8

Wang, Zhiyuan, Hong Xu, Jianxin Zhou, and Xiaojian Luan. "Simulation of SiO2/S coating deposition in a pilot plant set-up for coking inhibition." Chemical Engineering Research and Design 91, no. 1 (January 2013): 120–33. http://dx.doi.org/10.1016/j.cherd.2012.07.006.

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9

Zhang, Kangkang, Deyi Xu, Shiran Li, Na Zhou, and Jinhui Xiong. "Has China’s Pilot Emissions Trading Scheme Influenced the Carbon Intensity of Output?" International Journal of Environmental Research and Public Health 16, no. 10 (May 25, 2019): 1854. http://dx.doi.org/10.3390/ijerph16101854.

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China launched the pilot construction of the carbon emission trading scheme (ETS) in 2011. The pilots have been running for many years. Does ETS significantly restrain the increase of carbon emission intensity? Based on China’s panel data for provinces and industries, this paper uses the policy assessment method to evaluate the inhibition by ETS of carbon emission intensity. The assessment scope includes six provincial pilots and pilot industries covered by ETS. The results show that ETS has significant suppression of carbon emission intensity only in Beijing and Guangdong. There is no significant impact on the carbon emission intensity of Tianjin, Shanghai, Chongqing, and Hubei. Through the carbon emission intensity inhibition analysis of the industries covered by ETS from Beijing and Chongqing, the results of the production and supply of electric power, steam and hot water, petroleum processing and coking in Beijing have a significant impact on the ETS. Only the smelting and pressing of ferrous metals in Chongqing has a significant impact on the ETS.
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10

Julian, Ignacio, Christoffer M. Pedersen, Kostiantyn Achkasov, Jose L. Hueso, Henrik L. Hellstern, Hugo Silva, Reyes Mallada, Zachary J. Davis, and Jesus Santamaria. "Overcoming Stability Problems in Microwave-Assisted Heterogeneous Catalytic Processes Affected by Catalyst Coking." Catalysts 9, no. 10 (October 19, 2019): 867. http://dx.doi.org/10.3390/catal9100867.

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Microwave-assisted heterogeneous catalysis (MHC) is gaining attention due to its exciting prospects related to selective catalyst heating, enhanced energy-efficiency, and partial inhibition of detrimental side gas-phase reactions. The induced temperature difference between the catalyst and the comparatively colder surrounding reactive atmosphere is pointed as the main factor of the process selectivity enhancement towards the products of interest in a number of hydrocarbon conversion processes. However, MHC is traditionally restricted to catalytic reactions in the absence of catalyst coking. As excellent MW-susceptors, carbon deposits represent an enormous drawback of the MHC technology, being main responsible of long-term process malfunctions. This work addresses the potentials and limitations of MHC for such processes affected by coking (MHCC). It also intends to evaluate the use of different catalyst and reactor configurations to overcome heating stability problems derived from the undesired coke deposits. The concept of long-term MHCC operation has been experimentally tested/applied to for the methane non-oxidative coupling reaction at 700 °C on Mo/ZSM-5@SiC structured catalysts. Preliminary process scalability tests suggest that a 6-fold power input increases the processing of methane flow by 150 times under the same controlled temperature and spatial velocity conditions. This finding paves the way for the implementation of high-capacity MHCC processes at up-scaled facilities.
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Dissertations / Theses on the topic "Coking inhibition"

1

Geers, Christine [Verfasser]. "Inhibition of coking and metal dusting on conventional alloys by using a nickel-tin intermetallic coating / Christine Geers." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1033988405/34.

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FERNANDEZ, J. LASSO. "HYDROGEN PRODUCTION FROM RENEWABLE PRIMARY SOURCES." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/366899.

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ABSTRACT One of the most attracting renewable sources for energy production is bioethanol, which can be obtained from biomass. Special attention is here focused on the steam reforming reaction of ethanol (SRE) in which the principal product, hydrogen, is an interesting energy vector to produce power, electricity and heat. However, the process has not yet come to maturity and it should be optimized in order to made it industrially available. To this aim, we focused our work on catalysts synthesis for SRE, trying to couple high activity and durability. Different catalyst formulations based on Ni as active phase, supported over zeolite-BEA, zirconia, titania and lanthana were synthesized and characterized by N2 adsorption/desorption, temperature programmed reduction (TPR), X-rays diffraction, transmission electron microscopy and infra-red Fourier transform spectroscopy. The performance of the catalysts was evaluated for SRE by using absolute ethanol and bioethanol 50 and 90 vol%, obtained from second generation biomass and kindly supplied by Mossi&Ghisolfi. An important aim of the work was the intensification of the process from the energetic point of view, decreasing the energy input to the reformer (endothermal reaction) to better integrate this high temperature stage with the hydrogen purification section and the possible use of Proton Exchange Membrane Fuel Cells (PEM-FC).
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