Chemical looping combustion of high-sodium coal and gasification kinetics of coal char

被引：0
|
作者：
Yan J. [1 ]
Shen L. [1 ]
Jiang S. [1 ]
Ge H. [1 ]
机构：
[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, Jiangsu
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 05期
关键词：
Chemical looping combustion; High-sodium coal; Reaction kinetics; Sequential extraction method;
D O I：
10.11949/j.issn.0438-1157.20181394
中图分类号：
学科分类号：
摘要：
The continuous extraction method was used to extract the Zhundong high-sodium coal from Xinjiang, and the Zhundong coal samples containing different forms of sodium were prepared. The water-soluble sodium, ammonium acetate-soluble sodium and dilute hydrochloric acid-soluble sodium were investigated on a small fluidized bed. The results showed that the concentrations of carbonaceous gases and carbon conversion efficiency were significantly improved for water-washed ZD (WW-ZD) compared with untreated ZD. However, poor reaction properties of ammonium acetate washed ZD (AAW-ZD) and hydrochloric acid washed ZD (HAW-ZD) were obtained during a CLC process. The kinetics analysis on the isothermal gasification of ZD char with different extraction level was also investigated. The results showed that the activation energy of WW-ZD-H2O was minimal while the activation energy of HAW-ZD-H2O was maximum. It indicated that the H2O-soluble sodium plays a prohibitive role during the CLC of ZD, while the CH3COONH4-soluble sodium and HCl-soluble sodium have a distinct promotion effect on CLC combustion performance of ZD. © All Right Reserved.
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页码：1913 / 1922
页数：9
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