Acidity Modification of ZSM-5 for Methane Conversion in Co-feeding Method with MTA Reaction

• Published in: Chemical research in Chinese universities Vol. 38; no. 4; pp. 1012 - 1017
• Main Authors: Yu, Yue, Xi, Zhixiang, Zhou, Bingjie, Jiang, Binbo, Liao, Zuwei, Yang, Yao, Wang, Jingdai, Huang, Zhengliang, Sun, Jingyuan, Yang, Yongrong
• Format: Journal Article
• Language: English
• Published: Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 01.08.2022; Springer Nature B.V
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Conversion; Inorganic Chemistry; Methane; Methanol; Organic Chemistry; Physical Chemistry; Selectivity; Methane; Methanol to aromatics(MTA); Acid site; Co-reaction
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-021-1253-9

Acidity plays a vital role in methane conversion by co-feeding method, which is one of the best strategies to improve the utilization and gentle the reaction conditions of methane. In this work, Zn, Ni, Mo, La, Ga, Fe and Co-impregnated ZSM-5 zeolites have been prepared with the same substitutions to variate the acidities and tested in co-aromatization of methanol with methane. It is demonstrated that the new medium-strong acid sites formed by metal and strong acid sites are the key role to activate methane in co-reaction. Zn-modified ZSM-5 catalyst is preferred to exhibit the best methane conversion of 12%, whose aromatic selectivity increases from 27.2% to 52.2% compared with that of HZSM-5. Besides, the addition of methane further improves the production of high-valued aromatics compared with methanol to aromatics (MTA) reaction.