Study on the process of transformation of olefin into aromatics over HZSM-5
2005; Elsevier BV; Volume: 7; Issue: 4 Linguagem: Inglês
10.1016/j.catcom.2005.11.007
ISSN1873-3905
AutoresYueqin Song, Xiangxue Zhu, Longya Xu,
Tópico(s)Catalytic Processes in Materials Science
ResumoIn order to investigate the process of transformation of olefin into aromatics over HZSM-5, TPSR and pulse reaction were performed over HZSM-5, using alkenes, dienes and cycloolefins as reactants. The results illustrated that the initial step (i.e. the formation of diene or cycloolefin) in all hydrogen-transfer reactions during alkene aromatization could be carried out at temperatures lower than 200 °C, while the further hydrogen-transfer reactions between dienes/cycloolefins and alkenes/cycloolefins, leading to the formation of aromatics required relatively higher temperatures. It is concluded that the formation of aromatics is a result of repeated adsorption–reaction–desorption of alkenes on various acid sites. Furthermore, the pathway of olefin aromatization was not by a single pathway.
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