Дисертації з теми "Activated carbon/Methanol"
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Tao, Yong. "Development of TiO₂/activated carbon composite photocatalyst for the removal of methanol and hydrogen sulfide from paper mills." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013764.
Повний текст джерелаYou, Ying 1962. "A solar adsorption refrigeration system operating at near atmospheric pressure." Monash University, Gippsland School of Engineering, 2001. http://arrow.monash.edu.au/hdl/1959.1/8740.
Повний текст джерелаDouss, Néjib. "Etude experimentale de cycles a cascades a adsorption solide." Paris 7, 1988. http://www.theses.fr/1988PA077052.
Повний текст джерелаABDALLAH, KHODR. "Contribution experimentale a l'etude de la cinetique d'adsorption de gaz." Paris, ENSAM, 1989. http://www.theses.fr/1989ENAM0003.
Повний текст джерелаKotdawala, Rasesh R. "Adsorption studies of hazardous air pollutants in microporous adsorbents using statistical mechanical and molecular simulation techniques." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050407-112429/.
Повний текст джерелаKeywords: Activated carbons; Hydrogen cyanide; Methyl ethyl ketone; Adsorption; Mercury; Monte-Carlo; Solvents; Molecular simulations; Zeolites; Water; Methanol; Nanopores. Includes bibliographical references (leaves 147-150).
Cherif, Hamadi. "Etude et modélisation de méthodes de séparation du méthane et de H2S, sélection d'une méthode favorisant la valorisation de H2S." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEM074/document.
Повний текст джерелаBiogas must be purified for becoming a renewable fuel. At now, the most part of the purification techniques are not satisfactory because they imply hydrogen sulfides (H2S) rejection to the atmosphere. One example of these methods is the treatment with high pressure water. The first objective of the thesis is modeling the conventional methods for separating H2S from methane. Typical concentrations of H2S in methane vary from 200 to 5000 pm. Separation methods must decrease the concentration of H2S in methane to less than 1 ppm. At the same time, methods for H2S treatment will be studied.Once the most appropriated separation methods will be selected, some test will be carried out on a pilot plant capable of treating 85 Nm3/h of methane, where quantities of H2S ranging from 1 and 100 ppm will be injected. These tests will allow validating the modeling of the separation process. On the basis of the obtained results, a specific test bench will be conceived and constructed for validating the selected process.The thesis work requires simulating the separation process using the software Aspen Plus® or an equivalent one. The effectiveness of different operative conditions will be tested, varying also the parameter temperature. The energy necessary for the separation will be one of the most important criteria for the comparison, as well as the mass consumption of the different fluids involved in the process.A system approach is fundamental for evaluating the backward effect of the H2S valorization method on the separation techniques. The process simulator (Aspen Plus® or equivalent) will allow the system approach.The study will involve modeling and experimental parts. The experimental part will be carried out taking advantage of a semi-industrial size test bench, allowing studying the separation methods down to -90°C
Zhao, Yongling. "Study of activated carbon/methanol adsorption refrigeration tube and system integration." Thesis, 2011. http://hdl.handle.net/2440/66346.
Повний текст джерелаThesis (M.Eng.Sc.) -- University of Adelaide, School of Mechanical Engineering, 2011
應志鴻. "Methanol Carbonylation on Ni/C Catalyst Prepared with Half-Activated Carbon." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/46657056346854886523.
Повний текст джерела國立臺灣科技大學
化學工程系
89
Can sugar was used in this research as the raw material to prepare activated carbon. The carbon was then applied as a support to prepare Ni/AC catalyst. The activity and the stability of the catalyst in the carbonylation of methanol were subsequently examined. A method described as chemical activation was employed in this research to prepare the activated carbon. A mixture of ammonium phosphate [(NH4)2HPO4] and ammonium sulfate [(NH4)2SO4] was used as the activation agent. Activation temperature and composition of the activation agent were the variables studied in carbon preparation while reaction temperature and the time on stream were the variables investigated in catalyst activity tests. Instruments such as BET, XRD, TPD, TGA, DTA, EA, SEM&EDS, and FTIR were used to characterize the catalysts and the support (activated carbon). The characterizations revealed that activated carbon of lower surface area and pore volume and higher average pore size would be obtained if the activation agent employed in the preparation contained ammonium phosphate. Activated carbon of the maximum surface area and pore volume and minimum average pore size would be obtained by activating can sugar at 700℃. Activated carbon of more acid sites and greater acid strength would be obtained if the activation agent employed in the preparation contained ammonium phosphate. The characteristic peak of graphite was the only peak appeared in the XRD spectra of Ni/AC catalysts, showing nickel, sulfur and phosphorus were well dispersed on the catalysts. The peak appeared on the carbon activated at as low as 400℃, revealing the temperature was sufficient for the formation of activated carbon. Increasing the activation temperature would result in an increase in carbon content and decreases in hydrogen, oxygen, nitrogen, and sulfur contents in the carbon. The presence of ammonium phosphate in the activation agent and the use of high activation temperature both could result in carbon of finer sizes. The presence of ammonium phosphate in the activation agent could also enhance the bond strength between the sulfur and the carbon. The optimum temperature for activation of cane sugar was between 600 and 700℃. Using the carbon prepared at the temperature could give a Ni/AC catalyst of the highest activity in converting methanol to methyl acetate. The highest selectivity of methyl acetate could be found on the Ni/AC catalyst with the carbon being activated at 600℃. The conversion of methanol and the selectivity of methyl acetate were both increased with the content of ammonium phosphate in the activation agent. The conversion of methanol increased with the reaction temperature and started to leveled off when the reaction temperature reached 250℃. Maximum selectivity of methyl acetate was found at a reaction temperature of 200℃. Stability tests showed that the catalyst prepared from the carbon activated with the agent containing ammonium phosphate deactivated at a slower rate in comparison with those without ammonium phosphate. The catalysts could also be stabilized in a shorter time after the reaction.
Huang, Cheese, and 黃其思. "Catalytic Reaction of Acetonitrile and Methanol over PAN Based Activated Carbon Fiber." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/85275497185941794912.
Повний текст джерела靜宜大學
應用化學系
90
Catalytic synthesis of propionitrile from methanol and acetonitrile was achieved by using PAN based activated carbon fiber containing sodium. The activity of the catalysts depends on the source of sodium. The catalyst shows the highest activity when the Na2CO3 was used as a raw material for the preparation of catalysts. The conversion of acetonitrile reaches 75%, and the selectivity of propionitrile is 80%. The activity site of catalyst is sodium. The activity of catalysts deactive with increasing reaction time. The reason of deactivation was by the sodium losing. The activity of the catalysts can be enhanced upon the addition of silver. The catalytic activity of catalysts correlates well with the adsorption capacities of methanol and acetonitrile on the catalysts surface measured by the TPD method. A small amount of silver addition resulted an increasing in catalyst surface area. The adsorption capacities of methanol and acetonitrile were enhanced by the addition of silver.
Cai, Zong-Kai, and 蔡宗凱. "A Comparison study of activated carbon and Carbon Fiber Supported Nickel Catalysts for the Carbonylation of Methanol." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/89493634947683459526.
Повний текст джерелаTsai, jong-kai, and 蔡宗凱. "A Comparison study of activated carbon and Carbon Fiber Supported Nickel Catalysts for the Carbonylation of Methanol." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/17944294170115047948.
Повний текст джерела國立台灣工業技術學院
化學工程技術研究所
85
This article aimed at comparing the catalytic properties of activated carbon and carbon fiber supported nickel catalysts for the carbonylation of methanol. The compared items included the physical properties, the selectivity, and the deactivation of the catalysts. The effect of MeI concentration on the carbonylation was also investigated. The instruments used for the research were BET, chemisorption, EDS of SEM system, TPD, and a reaction system. The results indicated Ni/C catalyst had larger BET surface area and pores volume than Ni/FC. Ni/C had wider pores distribution than Ni/FC. The dispersion of nickel on Ni/C was lower than that on Ni/FC. There were several different sites on Ni/FC for MeOH and MeI adsorption but only one on Ni/C. Ni/FC catalyst could adsorbs more CO than Ni/C catalyst. Ni/FC catalyst''s surface was acidic and contained well dispersed phosphor and sulfur . The conversion of methanol on Ni/FC was higher than that on Ni/C. But the selectivity of AcOMe and AcOH on Ni/FC catalyst is lower than that on Ni/C. The highest activity of Ni/FC and Ni/C catalysts on methanol carbonylation was reached at 300oC.A further increase in the temperature would not increase the activity. The highest catalyst activity was obtained by a feed with 0.1 MeI/MeOH molar ratio. Ni/C and Ni/FC deactivated slightly in the initial two hours on stream, then remained stable for the next 5h in operation.
Hung-Li, Tyen, and 田鴻立. "Methanol Carbonylation on Heterogeneous Catalysts Using Sulfur and Phosphorus Modified Activated Carbon Fiber as Catalyst Supports." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/26329508617562063263.
Повний текст джерела國立臺灣科技大學
化學工程系
87
Sulfur and phosphorus were used to modify activated carbon fiber(ACF). The reasulting fibers,denoted as ACFS and ACFP respectively,were then used to prepare Ni/ACFS and Ni/ACFP catalysts. These catalysts along with Ni/ACF were employed in the carbonylation of methanol. The effects of S- and P- incorporations were examined by comparing the activity,selectivity,and deactivation of the catalysts before and after modification. The instruments used for catalyst characterization included BET,XRD,TPD,and ESCA. A reaction system to test the activities of the catalysts was also used. BET measurement revealed a drop in surface area if sulfur was added to ACF while there was no such a drop if phosphorus was incorporated. Acidity of ACF could be significantly enhanced by adding sulfur or phosphorus to the ACF, whit the latter being more effective than the former. ESCA spectra showed a remarkable increase in surface oxygen when ACF was modified by phosphorus. This observation implied a significant change in surface functional groups. Incorporating phosphorus could also enhance the dispersion of nickel. The amount of chemisorption of CO on Ni/ACF,Ni/ACFS, and Ni/ACFP was much more than that of hydrogen. Several explanations could be used to interpret the observation. Spill over of CO was one of them. The interaction between CO and bulk Ni to form carbonyl nickel with consumed excess CO was another one. The coverage of nickel particles by surrounding carbon, hindering the chemisorption of H2, constituted the third reason. The dispersion of nickel,as determined from H2-chemisorption data, had the following order: 5%Ni/ACFP > 5%Ni/ACF > 5%Ni/ACFS. The order become 5%Ni/ACF > 5%Ni/ACFS > 5%Ni/ACFP if CO chemisorption data were used. The order demonstrated the incorporation of phosphorus on ACF could hinder the spill over of CO. The characteristic peaks of nickel,sulfur, and phosphorus were not detected in XRD analysis showing these elements were well dispersed. The incorporation of sulfur or phosphorus could be easily discovered by EDS analysis. Activity of carbonylation of methanol of Ni/ACF could be improved by modifying the ACF with S. The improvement was eapecially obvious at low reaction temperature(e.g. 150℃). Another change in the reaction by the modification was the significant enhancement in the selectivity of acetic acid on the S-modified catalyst. The incorporation phosphorus markedly lowered the carbonylation activity of Ni/ACF catalyst. Due to the increase in the amount of acid sites by incorporation phosphorus, the principle product on Ni/ACFP was dimethyl ether, followed by methyl acetate. There was no acetic acid being detected. 5%Ni/ACF and 5%Ni/ACFS both suffered an initial deactivation in the reaction. The catalysts deactivated about 10% in the first 3 hours on stream. Then the catalysts become rather stable.
Sambath, Srivaths. "Study of Adsorption of Methanol in an Activated Carbon and Carbon Nanotube Matrix for Use in a Solar Based Refrigeration Cycle." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9075.
Повний текст джерелаWang, Ji. "Study on Accumulated Performance of a Solar Thermal Powered Adsorption Refrigeration System." Thesis, 2019. http://hdl.handle.net/2440/120966.
Повний текст джерелаThesis (MPhil) -- University of Adelaide, School of Mechanical Engineering, 2019
Hsu, Hung-Ta, and 許弘達. "Catalytic oxidation of methane with copper or cobalt embedded Activated carbon catalysts." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/a5c5qh.
Повний текст джерела嘉南藥理科技大學
環境工程與科學系
100
Copper nitrate、copper sulfate、and cobalt chloride were used as the impregnating agent with agriculture waste - coconut shell for preparing activated carbon catalyst. The impregnated coconut shells were activated to form activated carbon catalyst and applied for catalytic oxidation of methane with air. The oxidation activities of catalyst were investigated by considered the porosity and dispersion of active metal on activated carbon. The influence of impregnating agent on the pore characteristics of catalyst were investigated by BET analysis. The morphology and dispersion of active metal were observed by SEM-EDS. The catalytic oxidations were carried on by considering the ratio of air/methane, operating temperature, and activated carbon properties. It was found that the activated carbons with impregnated copper nitrate own the highest surface area, 993 m2/g. The pore volume of catalyst is mainly contributed by the micro pore volume and the mean pore size of this activated carbon is about 10.2 Å. It was also found that the oxidation activity of carbon catalysts are following in copper nitrate> copper sulfate> cobalt chloride as the impregnating agent in catalyst preparation. The catalytic oxidation activity of carbon catalyst depends on the active metal dispersion and adsorption area of carbon catalyst. The higher impregnating agent did not proportional promote a higher surface area and more active sizes on the catalyst due to the high viscosity metal salt hindered the penetration into the coconut shell structure. The optimum concentration of impregnating agent owns the higher surface area and active sizes on the carbon catalyst. In the case of impregnating agent with 0.05M, the methane conversion achieved 100%, 67.7%, and 65.9% (copper nitrate, copper sulfate, cobalt chloride) at 300℃ in oxidation. It was also found that the excess oxidant did not benefit the conversion of methane in oxidation due to the decline in pollutant adsorption on the catalyst.
Dutta, Debosruti. "Methane Storage In Activated Carbon Nanostructures : A Combined Density Functional And Monte Carlo Study." Thesis, 2009. http://etd.iisc.ernet.in/handle/2005/1329.
Повний текст джерела