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CO2-assisted ethane aromatization over zinc and phosphorous modified ZSM-5 catalysts
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2021-11-25 , DOI: 10.1016/j.apcatb.2021.120956
Chunyan Tu 1, 2 , Huahua Fan 3 , Dong Wang 1 , Ning Rui 4 , Yonghua Du 5 , Sanjaya D. Senanayake 4 , Zhenhua Xie 1, 4 , Xiaowa Nie 3 , Jingguang G. Chen 1, 4
Affiliation  

The tandem reactions of CO2-assisted oxidative dehydrogenation and aromatization (CO2-ODA) of ethane were investigated over ZSM-5 modified with zinc (Zn) and phosphorus (P) by experimental studies and DFT calculations. The nature of active Zn species and their interaction with P were elucidated for understanding Zn/P-ZSM-5 catalyzed CO2-ODA reaction of ethane. Compared to the direct dehydrogenation and aromatization (DDA) reaction, the Zn/P-ZSM-5 catalyst possessed higher ethane conversion, enhanced aromatics yield, and better stability in the CO2-ODA reaction. The presence of CO2 reduced the carbon deposition, stabilized the Zn species, and thereby facilitated the generation of more liquid aromatics in CO2-assisted ethane aromatization. In situ characterization and DFT calculations provided insight into the mechanisms of CO2-ODA over the Zn/P-ZSM-5 catalyst.



中文翻译:

锌和磷改性 ZSM-5 催化剂上的 CO2 辅助乙烷芳构化

通过实验研究和 DFT 计算,在用锌 (Zn) 和磷 (P) 改性的 ZSM-5 上研究了CO 2辅助氧化脱氢和乙烷的芳构化 (CO 2 -ODA)的串联反应。阐明了活性 Zn 物质的性质及其与 P 的相互作用,以了解 Zn/P-ZSM-5 催化的乙烷的CO 2 -ODA 反应。与直接脱氢芳构化(DDA)反应相比,Zn/P-ZSM-5催化剂在CO 2 -ODA反应中具有更高的乙烷转化率、更高的芳烃产率和更好的稳定性。CO 2的存在减少了碳沉积,稳定了 Zn 物种,从而促进了 CO 中更多液态芳烃的生成2-辅助乙烷芳构化。原位表征和 DFT 计算提供了对 Zn/P-ZSM-5 催化剂上 CO 2 -ODA机制的深入了解。

更新日期:2021-12-02
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