Characteristics of Alkali and Alkaline-Earth Metals for the Catalytic Gasification of Coal Char in a Fixed-Bed Reactor

被引：13

作者：

Wang, Yifei ^{[1
]}

Jin, Weilong ^{[1
]}

Huang, Taohua ^{[1
]}

Zhu, Longchu ^{[1
]}

Wu, Chaoqi ^{[1
]}

Yu, Guangsuo ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China

来源：

ENERGY TECHNOLOGY | 2013年 / 1卷 / 09期

关键词：

carbon dioxide; catalysis; coal gasification; kinetics; PART II; REACTIVITY; CO2; STEAM; KINETICS;

D O I：

10.1002/ente.201300071

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：

The effects of temperature, catalyst type, and catalyst loading on the gasification of coal char were investigated in a fixedbed reactor. The effects of catalyst dispersion, Brunauer-Emmett-Teller (BET) specific surface area, and crystallite constituents of Jinyou coal char with different loadings of K and Ca were also analyzed by energy-dispersive X-ray analysis (EDX), N-2 adsorption at 77 K, and X-ray diffraction (XRD). Results showed that K2CO3 could increase the gasification rate significantly for gasification temperatures greater than 850 degrees C. Cation species could have a significant influence on the catalytic activity. The reactivity of the coal char increased continuously with catalyst loading and resulted in a loading saturation level (LSL) of 10% for K. Compared with the raw char, K and Ca added to Jinyou coal decreased the BET specific surface area. Moreover, K and Ca added to Jinyou coal altered the crystallite constituents during the process of coking and gasification, which indicated that some K and Ca reacted with minerals in the Jinyou coal during the process of coking and gasification and partly deactivated the K and Ca.

引用

页码：544 / 550

页数：7

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