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煤泥水热解制氢及相关催化剂的研究
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摘要
本文主要对煤泥水热解制备氢气及相关金属催化剂进行研究,讨论了不同含水率的煤泥水热解过程中的能量消耗,利用球型y-AL2O3为载体,采用等体积浸渍法制备了单金属负载型和双金属负载型球粒催化剂,采用XRD、XPS、BET、SEM、TPR等现代分析手段对催化剂的结构和性能进行了表征,并通过单因素实验分析了不同条件对催化活性的影响。从金属催化剂的原子外层电子排布、d带空穴以及几何结构等方面进行研究,定性的指明这些因素与煤泥水热解制氢的关系,在不同条件下制备出了一种具有较高催化制氢活性的Ag/γ-Al2O3球粒催化剂,并进一步制备了双金属负载型球粒催化剂,并引入“氢溢流”等理论对双金属负载型球粒催化剂的催化制氢机理进行了解释,为热解制氢催化剂的发展提供了依据。
In this study, the research of hydrogen production by coal slime via pyrolysis with the related catalysts was conducted. Detailed discussion of the energy consumption in the pyrolysis process of coal slime with different water ratio was carried out. The supported monometallic sphere catalysts and supported bimetallic sphere catalysts are prepared by the method of Equivalent Volume Impregnation usingγ-Al2O3 as support. The structure and performance of the obtained catalysts was characterized by some innovative analysis instruments, such as XRD, XPS, BET, SEM and TPR, The effects of different condition on catalytic activity was also investigated by single factor experiment. The effect of catalyst outer electron configuration, d% and the geometric configuration on hydrogen production from coal slurry was illustrated qualitatively. The Ag/γ-Al2O3 sphere catalyst with higher catalytic activity was prepared in different conditions and also the supported bimetallic sphere catalyst was further prepared and the theory of "hydrogen spillover" was introduced to explain the mechanism of the making hydrogen in order to provide an evidence for the development of catalysts used making hydrogen.
引文
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