Transport Phenomena in Catalytic Hydrocracking of Polystyrene in Solution
Transport Phenomena in Catalytic Hydrocracking of Polystyrene in Solution
复制标题
聚苯乙烯在溶液中催化加氢裂化的传输现象
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. González
中科院分区：
文献类型：
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作者：
E. Fuentes;J. A. Salbidegoitia;M. P. González;J. González
在研究其动力学或优化催化剂之前，任何实验系统中的传质分析都是基础。从实验和理论的角度，研究了搅拌速率、催化剂浓度和粒径、氢气压力、反应温度、聚苯乙烯浓度和平均分子量等几个变量的影响，在搅拌釜中用氢气和催化剂（0.58 wt% Pt/H-β）在浆料中对溶解在十氢萘中的聚苯乙烯进行催化加氢裂化。结果表明，可以充分选择变量来防止气液和液固传质控制。然而，由于聚合物分子尺寸的原因，发生了严格的内部扩散控制，这实际上限制了催化剂外表面区域的反应。因此，该应用的催化剂优化以及一般聚合物反应物的催化过程应侧重于最大化...
Mass transfer analysis in any experimental system is fundamental before studying its kinetics or optimizing a catalyst. The effect of several variables, such as stirring rate, catalyst concentration and particle size, hydrogen pressure, reaction temperature, polystyrene concentration and average molecular weight, both from the experimental and the theoretical point of view, have been studied in the catalytic hydrocracking of polystyrene dissolved in decahydronaphthalene carried out in a stirred tank with hydrogen and catalyst (0.58 wt % Pt/H-β) in a slurry. The results show that the variables could be adequately selected to prevent both gas–liquid and liquid–solid mass transfer control. However, severe internal diffusion control occurred as a consequence of polymer molecular dimensions that, in practice, limits the reaction to the outer surface area of the catalyst. Thus, catalyst optimization for this application, and catalytic processes with polymer reactants in general, should be focused on maximizing ...