Organosilane surfactant-directed synthesis of hierarchical mordenite with enhanced catalytic performance in the alkylation of benzene with 1-dodecene

Autor:	Jianbo Zhang, Zhi-Xia Xie, Liu Mengnan, Qingqing Hao, Yu-Zhao Li, Chengyi Dai, Huiyong Chen, Qun-Xing Luo, Xiaoxun Ma
Rok vydání:	2020
Předmět:	Chemistry General Chemistry Microporous material Alkylation Catalysis Mordenite chemistry.chemical_compound Chemical engineering Materials Chemistry Alkylbenzenes 1-Dodecene Mesoporous material Zeolite
Zdroj:	New Journal of Chemistry. 44:16638-16644
ISSN:	1369-9261 1144-0546
Popis:	To improve the stability of mordenite (MOR) in the alkylation of benzene with long chain olefin, hierarchical MOR zeolites were synthesized by using organosilane surfactant [3-(trimethoxysilyl)propyl]octadecyldimethyl-ammonium chloride (TPOAC) as the mesopore structure-directing agent. Our findings reveal that the crystal size, hierarchical structure, and acidic properties of the mesoporous MOR zeolites are significantly influenced by the TPOAC/SiO2 molar ratio in the synthesis gel. Moreover, the hierarchical MOR zeolite synthesized under the optimized synthesis conditions presented the pure phase of the MOR framework and uniform mesoporous distribution. More importantly, the catalytic performance evaluated by the alkylation of benzene with 1-dodecene indicates that the optimal mesoporous MOR zeolite shows improved stability and comparable selectivity of 2-phenyl alkane (2-LAB) around 80% compared to the conventional sole microporous MOR zeolite. The improved stability of the mesoporous MOR zeolite can be attributed to the enhanced diffusivity of long chain linear alkylbenzenes and oligomers due to interconnected meso-/microporosity in the MOR.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c4cf859e3010aae8a4365fef05b4e984 https://doi.org/10.1039/d0nj03939j Zobrazit plný text záznamu