气化松焦油在SiO_2作用下的燃烧特性及燃烧动力学  

Combustion characteristics and combustion kinetics of gasification pine tar acted on by SiO_2

作　　者：陈波[1] 时章明[1] 刘波[2] 蒋绍坚[1] 何金桥[3] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]湖南工程学院电气信息学院,湖南湘潭411104 [3]长沙理工大学能源与动力工程学院,湖南长沙410114

出　　处：《中南大学学报（自然科学版）》2017年第7期1936-1941,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51276023);国家重点基础研究发展规划(973计划)项目(2009CB219803);长沙市科技计划重点支持项目(K1303168-11)~~

摘　　要：为研究生物质气化焦油在SiO_2作用下的燃烧特性,用松树皮在水冷式固定床生物质气化炉进行气化实验,将炉膛内黏附的焦油在SiO_2作用下进行热质量实验,并进行燃烧特性分析及动力学分析。研究结果表明:少量的SiO_2能改善气化松焦油的可燃性、稳燃性和燃尽性;当添加剂质量达到焦油质量的18.7%左右时,可燃性和稳燃性迅速下降,试样的燃尽性达到最佳;少量SiO_2的加入在水分及轻质油挥发阶段增加了吸热量,在燃烧阶段活化能从14.75 k J/mol下降到8.85 k J/mol;SiO_2质量与焦油质量的比值不能过大,否则过多的吸热量仍将影响其着火及燃尽特性。In order to study combustion characteristics of biomass gasification tar acted on by SiO_2, tar adhering to the furnace was investigated by thermo-gravimetric analyzer（TGA） after pine bark was gasified in the water-cooled biomass pyrolysis gasifier, and combustion characteristics and combustion kinetics were studied. The results show that ignition characteristics, combustible characteristics, combustible stability and burnout characteristics can be improved by blending a small amount of SiO_2. Ignition characteristics, combustible characteristics drop rapidly, burnout characteristics reach the maximum when the quality of SiO_2 is about 18.7% of the tar. Endothermic quantity increases in the stage of water and light hydrocarbons volatilization, activation energy decreases from 14.75 k J/mol to 8.85 k J/mol in the combustion stage by blending a small amount of SiO_2. The ratio of the tar quality to SiO_2 quality can not be too high, otherwise the excessive heat absorption will affect the ignition and burnout characteristics.

关 键 词：生物质 焦油 添加剂 燃烧特性 燃烧动力学 

分 类 号：TK6[动力工程及工程热物理—生物能] TK224.2