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Effects of catalyst acidity and HZSM-5 channel volume on polypropylene cracking

机译:催化剂酸度和HZSM-5通道体积对聚丙烯裂解的影响

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Effects of catalyst acidity and the restricted reaction volume afforded by HZSM-5 on the catalytic cracking of polypropylene are described. Polypropylene cracking by silica-alumina and HZSM-5 catalysts yields olefins as primary volatile products. In addition, HZSM-5 channels restrict carbenium ion rearrangements and facilitate formation of significant amounts of propene and alkyl aromatic volatile products. The higher acidity of sulfated zirconia compared to the other catalysts results in an increase in the frequency of hydride abstractions, resulting in the formation of significant yields of saturated hydrocarbons and organic residue for this catalyst. Primary polypropylene cracking products can be derived from carbenium ion reaction mechanisms. (C) 1998 John Wiley & Sons, Inc. [References: 20]
机译:描述了催化剂酸度和HZSM-5提供的受限反应体积对聚丙烯催化裂化的影响。用二氧化硅-氧化铝和HZSM-5催化剂裂解聚丙烯可得到烯烃作为主要挥发性产物。此外,HZSM-5通道限制了碳离子的重排,并有助于形成大量的丙烯和烷基芳香族挥发性产品。与其他催化剂相比,硫酸化氧化锆的较高酸度导致氢化物提取频率的增加,从而导致该催化剂形成大量的饱和烃和有机残留物。初级聚丙烯裂化产物可以源自碳正离子反应机理。 (C)1998 John Wiley&Sons,Inc. [参考:20]

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