共查询到20条相似文献,搜索用时 46 毫秒
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《煤炭加工与综合利用》2016,(6)
综述了我国甲醇及甲醇产业链最新生产和消费现状,对"十三五"时期我国甲醇及甲醇产业链的市场供需进行了预测;在对国内外甲醇资源供应进行分析后,得出"未来我国甲醇供求仍有一定缺口,仍需靠进口解决国内市场需求,甲醇及甲醇产业链发展前景较好"的结论。 相似文献
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介绍了粉煤气化配套装置低温甲醇洗工艺,对装置运行过程中出现的甲醇消耗过高的问题进行分析并改造。分析表明,放空尾气夹带甲醇和工艺参数控制不当是甲醇消耗高的重要原因。通过技术改造和工艺参数优化,甲醇消耗由改造前的40~50t/d下降至3t/d。 相似文献
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对甲醇生产变换工艺的配置进行了讨论;结合国内外实际工况,分析了在低汽气比条件下中变催化剂的过度还原问题;从工艺流程、设备配置、工业应用等方面阐述了适合于联醇或单醇生产的低温变换工艺。 相似文献
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以煤为原料 发展燃料甲醇 总被引:1,自引:0,他引:1
主要阐述了发展煤基燃料甲醇的意义,并对车用燃料甲醇推广中的几个环节进行了说明,尤其对燃料甲醇生产示范装置的建设提出了看法,认为我国完全可以在借鉴国外技术最新发展的前提下,在有资源优势和交通优势的地区自主建设30万t/a~60万t/a的燃料甲醇装置。 相似文献
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介绍了林德和鲁奇低温甲醇洗工艺吸收部分的工艺流程;计算分析了林德和鲁奇低温甲醇洗工艺防结冰甲醇的用量;提出了防结冰甲醇用量的计算公式。 相似文献
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The effect of methanol crossover on the fuel utilization of a passive direct methanol fuel cell (DMFC) was reported. The results revealed that the Faradaic efficiency decreased from 46.9 to 17.4% when methanol concentration increased from 1.0 to 8.0 mol L–1 at the lower current density 11.1 mA cm–2. However, the Faradaic efficiency increased from 14.7 to 31.3% when methanol concentration increased from 1.0 to 8.0 mol L–1 at a higher current density of 44.4 mA cm–2. On the other hand, although the amount of methanol was increased, the Faradaic efficiency did not change, obviously due to the uniform methanol crossover and methanol diffusion at the same methanol concentration and constant current. 相似文献
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Deactivation of Copper Metal Catalysts for Methanol Decomposition, Methanol Steam Reforming and Methanol Synthesis 总被引:2,自引:1,他引:2
Laboratory and industrial results are reviewed to elucidate the general features of the deactivation of supported copper metal catalysts in various reactions involving methanol as reactant or product. Most catalyst types are based on Cu/ZnO formulations that contain stabilisers and promoters such as alumina, alkaline earth oxides and other oxides. These additional materials have several roles, including the inhibition of sintering and absorption of catalyst poisons. All copper catalysts are susceptible to thermal sintering via a surface migration process, and this is markedly accelerated by the presence of even traces of chloride. Care must be taken, therefore, to eliminate halides from copper catalysts during manufacture, and from reactants during use. Operating temperatures must be restricted, usually to below 300°C.In methanol synthesis involving modern promoted Cu/ZnO/Al2 O3 catalysts neither poisoning nor coking is normally a significant source of deactivation; thermal sintering is the main cause of deactivation. In contrast, catalyst poisoning and coking have been observed in methanol decomposition and methanol steam reforming reactions. 相似文献