An experimental investigation on gasification-pyrolysis coupling characteristics of pulverized coal in circulating fluidized bed

被引：0
|
作者：
Zhang, Xiaoyu [1 ]
Qi, Xiaobin [1 ,4 ]
Gao, Sihong [1 ]
Li, Xinli [1 ,2 ]
Zhu, Zhiping [1 ,2 ,3 ]
Lyu, Qinggang [1 ,2 ,3 ]
机构：
[1] Inst Engn Thermophys, Chinese Acad Sci, State Key Lab Coal Convers, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Shanxi Engn Res Ctr Coal Clean Efficient Combust &, Datong, Peoples R China
[4] Shanxi Key Lab Coal Flexible Combust & Thermal Con, Datong, Peoples R China
来源：
JOURNAL OF THE ENERGY INSTITUTE | 2024年 / 116卷
关键词：
Gasification; Pyrolysis; Coupling characteristics; Pulverized coal; Circulating fluidized bed; FTIR;
D O I：
10.1016/j.joei.2024.101751
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 study, a reaction device coupling with gasification and pyrolysis was designed for multi-stage utilization of pulverized coal. The gasification-pyrolysis coupling characteristics and staged conversion of pulverized coal were investigated. The results showed that the temperature of gasification-pyrolysis region have a significant influence in gasification-pyrolysis products. With the increase of temperature in the gasification-pyrolysis region, the calorific value of syngas increased, whereas the yield of tar decreased. When gasification temperature was above 850 degrees C, the alkene converted into polycyclic aromatic hydrocarbons in gasification-pyrolysis tar during the gasification-pyrolysis process. Meanwhile, the reactivity of gasification-pyrolysis char was improved. The polycondensation reaction of polycyclic aromatic hydrocarbons and carbon skeleton cracking existed at the gasification-pyrolysis process simultaneously, corresponding to the gasification temperature above 700 degrees C and pyrolysis temperature above 550 degrees C. In addition, the combustion efficiency of gasification-pyrolysis products can reach above 99 %. The multi-staged utilization of pulverized coal was achieved by the gasification-pyrolysis coupling mode.
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页数：8
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