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随着低碳经济的持续发展,将煤炭气化,并合成CO与H2O,以更好地转化为低碳醇。它将会是绿色能源发展的重要方向,而通过煤炭气化,以合成低碳醇将会是更为重要的途径。通过煤炭合成气,可制备低碳醇。在确定低碳醇合成工艺条件过程中,我们可确定其煤炭气化的转化方式,并逐步地完善现阶段的煤炭合成低碳醇的工艺流程。 相似文献
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合成气直接制低碳混合醇一直备受关注,高性能催化剂的制备是研究的重点。水滑石(LDHs)由于其独特的性质使其成为优秀的金属催化剂前体材料。文章回顾了Cu基改性费托合成催化剂双活性中心合成醇的反应机理,重点综述了水滑石前法制备低碳混合醇催化剂的研究进展,并进一步讨论了水滑石前驱体法制备低碳混合醇催化剂面临的挑战和发展趋势。 相似文献
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合成气合成低碳醇是C1化学领域的重要内容之一,工艺技术的优化改进及开发高选择性、高活性并具有优良稳定性的催化剂是低碳醇合成技术的关键。本文综述了目前研究相对集中的工艺技术和催化剂的研究现状、热点及难点。 相似文献
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介绍了国内各科研机构合成气制低碳醇的研发现状:从应用上看低碳醇经分离提纯后各单醇组分做商品醇比混合醇组分做燃料醇更为切实可行;同时目前普遍的观点是混合醇组分中G2-OH组分越高,项目经济性越好,但经分离模拟,发现该项目以合成乙醇为目标最为经济可行。 相似文献
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阐述了开发苯丙氨酸的重要性,概述了当前采用的蛋白质水解法、发酵法、酶法、化学合成法等生产方法及其最新技术进展。提出了引进优良菌株、在我国尽快将酶转化法用于苯丙氨酸生产,加快化学合成法的开发研究等建议。 相似文献
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Application concepts and evaluation of small-scale catalytic combustors for natural gas 总被引:4,自引:0,他引:4
Hiroki Sadamori 《Catalysis Today》1999,47(1-4):325-338
Basic application concepts of catalytic combustion are roughly classified into three types, and the development of catalysts, combustion performance and applicability are stated. On the diffusive catalytic combustion method, completeness of methane combustion and its reaction mechanism have been demonstrated by detailed combustion analysis of the burner and reaction kinetics. On the adiabatic lean premixed catalytic combustion method, applicability of a high-temperature catalyst system based on Mn-substituted hexaaluminate monolithic honeycomb to a 1.5 MW gas turbine combustor has been investigated through pressurized combustion tests and prototype engine-rig tests. As a result, a good outlook of the basic technical problems to overcome including the catalyst durability and the combustor control method was obtained, but another problem was that of the combustor capacity. In view of the progress of the non-catalytic lean premixed combustion method, it was concluded that a hybrid catalytic combustion method limiting catalytic combustion to the low-temperature range in this concept might become efficient in the future, but that it would depend on the development of efficient catalysts initiating their activity at about 350°C and having durability at 1000°C. 相似文献
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介绍了摩托车用NBR/PVC橡胶护套的研制。针对该产品的使用条件和技术要求,阐述了配方设计特点和生产工艺要点。产品性能完全符合用户要求。 相似文献
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聚酰胺亚胺(PAI)是一种热塑性高分子材料,具有优异的耐热性、介电性、机械特性和化学稳定性。本文介绍偏苯三酸酐和以偏苯三酸酐为原料合成PAI的方法,并阐述各合成方法的过程特点。同时,简介PAI的性能和应用。 相似文献
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Shriram Bagrodia Yousef Mohajer Garth L. Wilkes Robson F. Storey Joseph P. Kennedy 《Polymer Bulletin》1982,8(5-6):281-285
Strain induced crystallization has been observed at 25°C in low molecular weight three-arm star polyisobutylene ionomers at elongations exceeding about 550%. The sulfonated form of the polymer was neutralized with calcium hydroxide. The number average molecular weight of the polymer was only 9,000 with a dispersity ratio of about 1.7. This molecular weight is at the edge of the critical molecular weight for entanglements. Strain induced crystallization has been reported in the literature for very high molecular weight linear polyisobutylene. However, no such effects have been observed for linear, low molecular weight polyisobutylene and it has been stated it could not be induced. The cause for this strain induced crystallization in our materials is due to the presence of three ionic terminal groups per molecule which results in sufficient coulombic forces for maintenance of molecular orientation with strain without significant relaxation. 相似文献
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The effect of the water-gas reaction as a parallel running process is investigated by adding two elementary steps to the reaction mechanism and the rale equations defined by Berly el at. The methanol synthesis and shift reactions interact, mostly through the common step of hydrogen chemisorption. The detailed rate expression is derived and the Vekron-I Test Problem is developed, Analysing a simplified rate equation version it can be stated that the driving force expression for both processes is incorporated in both rates. 相似文献