共查询到20条相似文献,搜索用时 31 毫秒
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钢铁生产是高温作业.为达到可持续发展的要求,应在物料方面实行再循环,尽力实现废弃物"零排放",在能源方面尽可能减少能量消耗.热化学法回收冶金生产过程的余热,有可能实现能量转化过程熵的梯次递增原则,减少火用损失,达到能量利用的高效率.此外,把余热热能转化为化学能,有利于远距离输送,改善国民经济的工业生态链.本文对冶金生产余热的热化学回收进行了初步探讨. 相似文献
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Topics in Catalysis - Electron tomography (ET) has rapidly developed into a powerful technique to characterize the three-dimensional (3D) structure of complex materials, with nanometer resolution,... 相似文献
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Because of the relative ease to modify, functionalize, and synthesize polysiloxanes, these compounds offer interesting possibilities to greatly influence the properties of a catalytic system. These potentials are illustrated with three catalytic systems. In the first system, siloxane nanocages are shown to exhibit confinement effects by strongly modifying the protonation affinity of internal amine groups and by changing the activity and product selectivity in a reaction catalyzed by these groups. In the second example, the length of the siloxane backbone of a bis(pyridyl)siloxane ligand is shown to be critical both in stabilizing a Pd acetate complex catalyst in selective oxidation of benzyl alcohol, and in determining the dependence of the reaction rate on the pyridyl concentration in the reaction mixture. In the third example, polysiloxanes are shown to be useful in the preparation of a supported Pd catalyst in which the metal loading and particle size can be independently controlled. 相似文献
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W. F. Maier 《化学,工程师,技术》2003,75(8):1048-1048
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合成氨是重要的化工原料,合成氨工业在国民经济中占有重要地位,因此合成氮工艺和催化剂的改进对降低能耗、提高经济效益有巨大影响。文章对合成氨催化剂的研究进展进行了评述,提出合成氨催化剂的发展建议。 相似文献
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介绍了费托合成催化剂研究开发的意义,详细综述了Co基F—T合成催化剂前驱体、助剂、溶剂及载体效应的研究进展,并对各因素对F—T反应活性与产物选择性产生的影响进行了分析。 相似文献
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简要介绍环氧化物水解酶的研究进展。重点介绍环氧化物水解酶的结构特点和催化特性,即核心结构和帽子结构两个功能性结构及三位一体的催化活性构象。最后介绍环氧化物水解酶在生物催化等精细化学品领域中的应用,并展望其广阔的应用前景。 相似文献
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