摘要
在喷动-载流床中制备了不同比例煤与麦秸的共热解焦,在热天平中考察了共热解焦CO2气化反应性,分析了原料比率、热解温度等对共热解焦气化反应特性的影响.结果表明,20%生物质添加比例下,煤-麦秸共热解焦的气化反应性即明显高于煤焦,且共热解焦反应性随生物质比例增加而增大,脱碱金属麦秸与煤共热解焦的反应性则与煤焦相近;试验条件下,热解温度750℃制备的共热解焦中碱金属钾含量最高,并具有最高的气化反应性.动力学分析表明,与煤焦相比,煤-麦秸共热解焦的气化反应活化能显著降低.
The co-pyrolysis chars of coal and straw were prepared in a spout-entrained reactor with different ratios of coal to straw. The CO2 gasification characteristics of co-pyrolysis char was investigated using a thermogravimetric analysis (TGA). The results show that the gasifi- cation reactivity of copyrolysis chars derived from coal and straw is obviously higher than that of coal char even at 20% blending ratio of straw. The co-pyrolysis char of coal and demineralized straw has the similar reactivity with coal char. The experimental results show that the copyrolysis char prepared at 750 °C has the highest potassium concentration and gasification reactivity. The kinetic analysis reveals that the copyrolysis char shows obviously lower activation energy than coal char.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2011年第4期616-621,共6页
Journal of China University of Mining & Technology
基金
国家重点基础研究发展计划(973)项目(2004CB719704)
关键词
共热解
催化气化
钾
煤
麦秸
co-pyrolysis
catalytic gasification
potassium
coal
straw