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典型煤种CO_2气化过程中产物的析出特性
引用本文:万斌,石金明,向军. 典型煤种CO_2气化过程中产物的析出特性[J]. 南昌大学学报(工科版), 2012, 34(4): 325-328
作者姓名:万斌  石金明  向军
作者单位:1. 江西省科学院能源研究所,江西南昌,330029
2. 华中科技大学煤燃烧国家重点实验室,湖北武汉,430074
基金项目:国家自然科学基金资助项目,江西省科技支撑计划资助项目,江西省科学院科研开发专项博士资助项目,江西省科学院产学研合作资金资助项目
摘    要:CO2气氛下在热重分析仪上对3种典型煤种分别进行了气化实验,与便携红外分析仪连用,详细研究了煤气化产物与温度、煤种的关系。结果表明:气化温度在500~800℃之间,C煤的甲烷生成速率较高,但焦炭与水蒸气的气化反应较慢,但温度达到1 000℃时甲烷会分解;在热重分析仪中,高灰分阻碍了气化反应的进行,400~1000℃过程中失重曲线较平缓,在1 000℃之后,TG曲线有了明显的变化;煤化程度越低,越有利于挥发分的析出,有利于提高气化过程中CO和CH4的析出量,而且降低了有机硫(COS)的析出量。

关 键 词:煤气化  CO2气氛  热重  气化产物

Gases Releasing Characteristics of Typical Coals with CO2 during Gasification
WAN Bin , SHI Jin-ming , XIANG Jun. Gases Releasing Characteristics of Typical Coals with CO2 during Gasification[J]. Journal of Nanchang University(Engineering & Technology Edition), 2012, 34(4): 325-328
Authors:WAN Bin    SHI Jin-ming    XIANG Jun
Affiliation:1.Institute of Energy of Jiangxi Academy of Science,Nanchang 330029,China; 2.State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China)
Abstract:Gasification experiments of three kinds of typical coals were carried out in CO2 atmosphere by the TG analyzer with portable infrared analyzer separately.The relationships of coal gasification products with temperature and coal types were investigated.The results showed that the methane formation rate was higher and the gasification reaction of coke and steam was relatively slow at 500-800 ℃,but the formation rate of methane declined for decomposition after 1 000 ℃.In the TG result,high content ash hindered the gasification reaction,and weightlessness curve was gentle at 400-1 000 ℃,but weightlessness curve has changed greatly after 1 000 ℃.The volatile matter release increased with the degree of coalification decreasing,which was beneficial to improve the quantity of CO and CH4 during gasification,but also reduced the amount of COS.
Keywords:coal gasification  CO2 atmosphere  TG analyzer  gasification products
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