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《精细化工原料及中间体》2017,(10)
<正>近日,甲烷二氧化碳自热重整制合成气装置在山西潞安集团煤制油基地实现稳定运行。目前该装置已稳定运行了1000小时以上。甲烷二氧化碳重整制合成气技术源于中国科学院上海高等研究院、山西潞安矿业(集团)有限责任公司和荷兰壳牌 相似文献
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《化学工业与工程技术》2017,(4)
<正>近日,甲烷二氧化碳自热重整制合成气装置在山西潞安集团煤制油基地实现稳定运行,即在前期试运行和系统优化的基础上,6月21日该装置启动全系统运行,7月10日实现满负荷生产,8月2日完成了中国石油和化学工业联合会组织的现场标定。甲烷二氧化碳重整制合成气技术源于中国科学院上海高等研究院、山西潞安矿业(集团)有限责任公司和荷兰壳牌石油 相似文献
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介绍了膜催化技术在甲烷转化反应中的应用,这些过程包括甲烷氧化偶联反应制乙烯,甲烷部分氧化制甲醇,甲烷水蒸气重整制合成气等,通过膜催化反应与传统催化反应的比较,揭示了膜催化技术的优点。 相似文献
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综述了目前转化利用天然气制备合成气的主要方法,包括甲烷水蒸气重整、甲烷部分氧化、甲烷二氧化碳重整、甲烷水蒸气重整与部分氧化耦合反应、甲烷部分氧化与二氧化碳重整耦合反应、甲烷水蒸气重整与二氧化碳重整耦合反应以及甲烷的三重整反应,重点介绍了前3种典型反应所用的催化剂,最后提出将这3种典型反应耦合使用,并辅以晶格氧工艺、等离子体技术、微波技术是未来甲烷转化制备合成气的发展趋势。 相似文献
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由于二氧化碳重整甲烷制合成气具有很多优点,因此引起了广泛的关注。本文综述了二氧化碳重整甲烷制取合成气的研究进展,介绍了二氧化碳重整甲烷热力学、甲烷和二氧化碳的活化、二氧化碳重整甲烷反应过程中的表面积碳和消碳和二氧化碳重整甲烷反应机理的研究现状,并进行了讨论和分析。 相似文献
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运用吉布斯自由能最小化方法对生物质粗燃气自热重整过程进行了热力学分析,研究了重整反应过程中的温度,O2/CH4摩尔比及焦油摩尔分数等因素对平衡产物组成的影响规律。研究结果表明:低温有利于CO歧化与加氢反应,而高温促进了CH4和CO2的转化,提高合成气H2+CO摩尔分数,降低H2/CO摩尔比。O2/CH4摩尔比的增加有利于生物质燃气从部分氧化反应向完全氧化反应转变,促进了CH4的重整反应而抑制了CO2的转化;O2/CH4摩尔比的增加降低了合成气H2+CO摩尔分数,降低了H2/CO摩尔比,在重整后的生物质粗燃气中,n(H2)/n(CO)≈1。积碳量随温度升高和O2/CH4摩尔比的增加逐渐减少,随着焦油(C10H8)物质的量的增加而增加。焦油物质的量增加提高了合成气中H2与CO摩尔分数,是重整反应的重要原料。优化的生物质燃气自热重整反应条件为温度1 023 K,O2/CH4摩尔比0.7,焦油摩尔分数<1%。 相似文献
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Dry autothermal reforming of glycerol uses a combination of dry (CO2) reforming and partial oxidation reactions to produce syngas rich product stream. Thermodynamic equilibrium data for dry autothermal reforming of glycerol was generated for temperature range 600-1000 K, 1 bar pressure, OCGR [feed O2/C (C of glycerol only) ratio] 0.1 to 0.5 and CGR [feed CO2/glycerol ratio] 1 to 5 and analyzed. The objective of the paper is to identify the thermodynamic domain of the process operation, study the variation of product distribution pattern and describe the optimum conditions to maximize yield of the desired product and minimize the undesired product formation. Higher OCGR and higher CGR yielded a syngas ratio (∼ 1), with lower carbon and methane formation, while lower CGR and lower OCGR yielded good hydrogen and total hydrogen, with low water and CO2 production. The best thermoneutral condition for DATR of glycerol operation was seen at a temperature of 926.31 K at 1 bar pressure, OCGR = 0.3 and CGR = 1 that gave 2.67 mol of hydrogen, 4.8 mol of total hydrogen with negligible methane and carbon formations. 相似文献
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Production of synthesis gas 总被引:5,自引:0,他引:5
The state-of-the-art for the production of synthesis gas from the steam reforming of methane is reviewed and discussed. Particular attention is given to the design of the tubular reformer and carbon formation on the nickel catalyst. Improvements in syngas technology are discussed, including: CO2 reforming, autothermal reforming and heat exchange reforming, and the energy efficiencies of direct and indirect methane conversion are compared and contrasted. 相似文献
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本文叙述了一种利用低质矿井区煤层气(CMM)[甲烷含量30%(φ)左右]制氨合成气的工艺及有关工艺条件的影响。低质煤层气通过自热转化制气,经变换,变压吸附脱氮,脱碳,制得氢氮体积分数之比为3的氨合成气。对于含30%(φ)甲烷的煤层气,脱氮成本112元/吨氨,由于低质煤层气价格较低,以折纯甲烷0.60元/Nm3计,脱氮后相当于纯甲烷价格为0.714元/Nm3,故具有较好的经济效益、环境效益和社会效益。氨可进一步加工为硝酸、或硝酸铵、或磷酸铵等,则可获得更大的经济效益。 相似文献
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Yuichi Matsuo Yusuke Yoshinaga Yasushi Sekine Keiichi Tomishige Kaoru Fujimoto 《Catalysis Today》2000,63(2-4):439-445
The effect of fluidized bed reactor in autothermal CO2 reforming of methane over NiO–MgO solid solution catalysts was investigated by comparing with fixed bed reactor. Methane conversion to syngas was drastically enhanced by using a fluidized bed reactor. The catalyst was reduced and oxidized repeatedly in fluidized bed reactor during the reaction. The enhancement of methane conversion is related to the catalyst reducibility. 相似文献
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Synthesis gas production by steam reforming of ethanol 总被引:4,自引:0,他引:4
V. V. Galvita G. L. Semin V. D. Belyaev V. A. Semikolenov P. Tsiakaras V. A. Sobyanin 《Applied Catalysis A: General》2001,220(1-2):123-127
A two-layer fixed-bed catalytic reactor for syngas production by steam reforming of ethanol has been proposed. In the reactor, ethanol is first converted to a mixture of methane, carbon oxides and hydrogen over a Pd-based catalyst and then this mixture is converted to syngas over a Ni-based catalyst for methane steam reforming. It has been shown that the use of the two-layer fixed-bed reactor prevents coke formation and provides the syngas yield closed to equilibrium. 相似文献
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Pirouz Shahkarami 《Chemical Engineering Communications》2013,200(6):774-786
Mathematical modeling of the methane-combined reforming process (steam methane reforming–dry reforming methane) was performed in a fluidized bed membrane reactor. The model characterizes multiple phases and regions considering low-density phase, high-density phase, membrane, and free board regions that allow study of reactor performance. It is demonstrated that the combined effect of membrane and reaction coupling provides opportunities to overcome equilibrium limits and helps to achieve higher conversion. Additionally, the influence of key parameters on reactor performance including reactor temperature, reactor pressure, steam to methane feed ratio (S/C), and carbon dioxide to methane feed ratio (CO2/C) were investigated in the multi-objective genetic algorithm to find the optimal operating conditions. Finally, the process of steam reforming was simulated in selected optimal conditions and the results are compared to those of the combined reforming process. Comparison reveals the superiority of the combined reforming process in terms of methane conversion, catalyst activity, and outlet H2/CO ratio in the syngas product in being close to unity. 相似文献
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The conversion of natural gas(methane) to syngas (reforming reaction) is regarded as alternative routes for production of great value compounds, such as synthetic liquid fuels and oxygenated compounds. The aim of this work is to investigate the highest activity catalyst among 30 catalyst candidates which consists of Ni-M [M (promoter) = Co, Fe, Ce] on γ-Al2O3, by combinatorial method for autothermal reforming. The catalyst candidates with different M/Ni molar ratio were prepared by the impregnation method. The consistent results were found between 32 channel reactors and single fixed bed reactor. It was found that the best catalyst is 5.54 wt%Ni-13.3wt% Ce/γ-Al2O3. 相似文献
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Y. Patcharavorachot M. Wasuleewan S. Assabumrungrat A. Arpornwichanop 《Theoretical Foundations of Chemical Engineering》2012,46(6):658-665
This paper presents a performance analysis of a dual-bed autothermal reformer for hydrogen production from methane using a non-isothermal, one dimensional reactor model. The first section of Pt/Al2O3 catalyst is designed for oxidation reaction, whereas the second one based on Ni/MgAl2O4 catalyst involves steam reforming reaction. The simulation results show that the dual-bed autothermal reactor provides higher reactor temperature and methane conversion compared with a conventional fixed-bed reformer. The H2O/CH4 and O2/CH4 feed ratios affect the methane conversion and the H2/CO product ratio. The addition of steam at lower temperatures to the steam reforming section of the dual-bed reactor can produce the synthesis gas with a higher H2/CO product ratio. 相似文献
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Tatsuya Takeguchi Shin-Nosuke Furukawa Masashi Inoue Koichi Eguchi 《Applied Catalysis A: General》2003,240(1-2):223-233
Ni catalysts supported on various solid solutions of ZrO2 with alkaline earth oxide and/or rare earth oxide were synthesized. The catalytic activities were compared for partial oxidation of methane and autothermal reforming of methane. For partial oxidation of methane, the Ni catalyst supported on a CaO–ZrO2 solid solution showed a high activity. Incorporation of CaO in the ZrO2 matrix was effective for increasing the reduction rate of the NiO particles and for decreasing the coke formation. On the other hand, the Ni particles supported on the CaO–CeO2–ZrO2 solid solution had a strong interaction with the support, and the Ni particles showed high activity and stability for autothermal reforming of methane. 相似文献