Enhanced yield of benzene, toulene, and xylene from the co-aromatization of methane and propane over gallium supported on mesoporous ZSM-5 and ZSM-11

被引：39

作者：

Song, Changyeol ^{[1
]}

Gim, Min Yeong ^{[1
]}

Lim, Yong Hyun ^{[1
]}

Kim, Do Heui ^{[1
]}

机构：

[1] Seoul Natl Univ, Inst Chem Proc, Sch Chem & Biol Engn, 1 Gwanak Ro, Seoul 08826, South Korea

来源：

FUEL | 2019年 / 251卷

基金：

新加坡国家研究基金会;

关键词：

BTX production; Gallium oxide; Mesoporous HZSM-5; Mesoporous HZSM-11; Co-aromatization of methane and propane; CATALYTIC PERFORMANCE; ZEOLITE CATALYSTS; DEHYDRO-AROMATIZATION; HZSM-5; ZEOLITES; N-PENTANE; CONVERSION; DEHYDROGENATION; ACIDITY; COAROMATIZATION; ACTIVATION;

D O I：

10.1016/j.fuel.2019.04.079

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this work, mesopore was introduced to ZSM-5 and ZSM-11 to increase the yield of benzene, toluene, and xylene (BTX) from the co-aromatization of methane and propane. Co-aromatization of methane and propane (10:1M ratio) at 550 degrees C revealed that gallium oxide (2 wt%) supported on mesoporous zeolites showed higher BTX selectivity and BTX yield than that on microporous zeolites. In particular, the BTX yield of GaOy/meso-HZSM-11 (13.94%) was higher than that of GaOy/meso-HZSM-5 (11.20%), in addition to showing more stable activity up to 6 h. H-2-TPR analysis indicated that GaOy/meso-HZSM-11 contains more mobile Ga2O species and GaO+ ion than GaOy/meso-HZSM-5. In addition, NH3-TPD analysis confirmed that such highly dispersed Ga species interact with Bronsted-Lowry acid sites of zeolites to produce medium acid site acting as Lewis acid more abundantly in the former than the latter. In summary, the superior co-aromatization performance with the highest reactant conversion of GaOy/meso-HZSM-11 was achieved by the synergetic effect of Lewis acid site formed by dispersed Ga species and Bronsted-Lowry acid sites of mesoporous HZSM-11.

引用

页码：404 / 412

页数：9

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