Capsule-like zeolite catalyst fabricated by solvent-free strategy for para-Xylene formation from CO2 hydrogenation

An efficient Na-FeMn/HZSM-5@Silicalite-1 catalyst was rationally designed for direct conversion of CO2 to aromatics. The tailor-made HZSM-5@Silicalite-1 core-shell zeolite was prepared by a facile solvent-free method. The solvent-free synthesis of core-shell zeolite could not only address pollution...

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Vydané v:Applied catalysis. B, Environmental Ročník 303; s. 120906
Hlavní autori: Gao, Weizhe, Guo, Lisheng, Wu, Qinming, Wang, Chengwei, Guo, Xiaoyu, He, Yingluo, Zhang, Peipei, Yang, Guohui, Liu, Guangbo, Wu, Jinhu, Tsubaki, Noritatsu
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Amsterdam Elsevier B.V 01.04.2022
Elsevier BV
Predmet:
Aromatic compounds
Aromatics
Carbon dioxide
Catalysts
CO2 conversion
Direct conversion
HZSM-5 @Silicalite-1 core-shell zeolite
p-Xylene
Para-Xylene
Reagents
Silicalite
Silicon dioxide
Solvent-free synthesis
Solvents
Xylene
Zeolites
Aromatics
HZSM-5 @Silicalite-1 core-shell zeolite
Para-Xylene
CO2 conversion
Solvent-free synthesis
ISSN:0926-3373, 1873-3883
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Shrnutí:An efficient Na-FeMn/HZSM-5@Silicalite-1 catalyst was rationally designed for direct conversion of CO2 to aromatics. The tailor-made HZSM-5@Silicalite-1 core-shell zeolite was prepared by a facile solvent-free method. The solvent-free synthesis of core-shell zeolite could not only address pollution issues by eliminating the large utilization of organic reagents, but also exhibit a better performance for separating para-Xylene (PX) from xylenes with the assistance of capsule-like zeolite oriented synthesis. For CO2 to aromatics reaction, Na-FeMn combining with capsule-like HZSM-5@Silicalite-1 catalyst could reach 81.1% PX/X (the C-mol ratio of PX to all xylenes) ratio, which was higher than those of conventional core-shell zeolites, such as HZSM-5@SiO2 and HZSM-5@Silicalite-1 core-shell zeolites which were obtained from traditional chemical liquid deposition and hydrothermal methods. The as-synthesized zeolite paves a new route for efficient conversion of CO2 molecules into valuable PX, and provides a facile method for regulating surface acid properties of zeolite. [Display omitted] •HZSM-5 @Silicalite-1 core-shell zeolite was prepared by a facile solvent-free method.•The external surface acid sites of HZSM-5 zeolite were completely covered by Silicalite-1 shell.•HZSM-5 @Silicalite-1 core-shell zeolite could enhance the PX selectivity in CO2 to aromatics reaction.•HZSM-5 @Silicalite-1 core-shell zeolite exhibited a high PX/X ratio as high as 81.1%.
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ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2021.120906