Kinetics and Mechanisms of The Reactions of Catalytic Synthesis of Aromatic Hydrocarbons from Methane

Authors

  • Fayzullaev Normurot Ibodullaevich, Saginaev Amanjan Turemuratovich, Xolliyev Shamsiddin Xudoyberdiyvich, Khakimov Firuz Khalikovich, Buronov Anvarjon Yusuf o’g’li

Abstract

Described is a method of selecting a hydrocarbon aromatization catalyst having high activity
and selectivity. As a result of studying the textural characteristics of the catalyst 6,0% ??*2,0%
Zr*2,0% Zn/HSZ, it was proved that the samples had a layered petal structure, which provides a high
surface area of the zeolite. The zeolites were ground in a vibrating mill and the activity of their acid
centres was investigated. In ammonia desorption, strong acid centre concentrations decrease by 38
?mol/g and ammonia desorption activation energy decreases by 13.7 kJ/mol. Analysis of the
mechanism of the methane dehydroaromatization reaction on the catalyst under study showed that
methane is activated by the release of hydrogen radicals in the active centre and forms CHx in the gas
phase, then CHx oligomerizes in the C2Hy, which in turn forms aromatic hydrocarbons in the
Brensted acid centres. Based on the research, a bifunctional mechanism and a kinetic equation for the
reaction of methane dehydroaromatization were proposed.

Published

2020-10-17

Issue

Section

Articles