HZSM-5中丙烯和1-辛烯寡聚的非弹性中子散射研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.1595/205651324x16964134291592

Alexander P. Hawkins, Andrea Zachariou, Paul Collier, Russell F. Howe, David Lennon, Stewart F. Parker

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引用次数: 0

摘要

采用准弹性中子散射(QENS)和非弹性中子散射(INS)方法研究了丙烯和1-辛烯在酸性沸石催化剂h - zsm5上的反应性。催化剂的高活性使烯烃在室温下形成线性低聚物。INS表明反应是通过一个氢键中间产物进行的。使用丙烷作为丙烯的惰性类似物的研究发现，吸附的C3分子大部分时间在沸石的孔隙通道内经历短暂的跳跃。水热脱铝对沸石催化剂的活性有重要影响。研究发现，由于酸-烃相互作用的减少，脱铝可以延缓低聚反应在高温下的催化活性，并增加沸石中碳氢化合物的流动性。

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Inelastic Neutron Scattering Studies of Propene and 1-Octene Oligomerisation in HZSM-5

Neutron scattering methods (quasielastic neutron scattering (QENS) and inelastic neutron scattering (INS)) have been used to study the reactivity of propene and 1-octene over the acid zeolite catalyst H-ZSM 5. The high activity of the catalyst causes the alkenes to form linear oligomers below room temperature. INS has shown that the reaction proceeds through a hydrogen-bonded intermediate. Studies using propane as an inert analogue for propene have found that the adsorbed C3 molecules spend the majority of their time undergoing short jumps within the pore channels of the zeolite. Hydrothermal de-alumination plays an important role in determining the activity of zeolite catalysts. De-alumination was found to delay the onset of catalytic activity for oligomerization to higher temperatures and increase the mobility of hydrocarbons within the zeolite, both due to reduced acid-hydrocarbon interactions.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.