生物质与三种不同变质程度的煤混合热解H_2S析出规律  

Investigation of the Characteristics of H_2S Released from Biomass and Coals of Different Metamorphic Grade Blends During Co-pyrolysis

作　　者：尚琳琳[1] 程世庆[1] 王宪红[1] 殷炳毅[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《节能技术》2007年第5期410-412,445,共4页Energy Conservation Technology

摘　　要：采用热重分析和色谱、质谱偶联技术,对玉米秆与三种不同变质程度的煤混合热解中产生的H2S气体进行了在线检测,研究生物质对不同煤种热解析出H2S气体的影响。研究表明:生物质与不同变质程度的煤的混合热解过程中H2S析出有着相似的规律,即生物质的加入使煤析出H2S提前,且随着生物质比例的增加,H2S在更低的温度下有较大的析出速度。生物质与煤共热解时,在380℃以前析出的H2S的浓度和析出量都比煤单独热解时的高,且随着生物质加入比例的增加而增加,这是生物质加氢作用的影响。且随着煤中含氢量的增加,生物质对煤热解过程的加氢作用表现得越不明显。生物质与不同变质程度的煤的混合热解过程中H2S析出规律是生物质加氢作用和矿物质固硫作用的综合结果。　Thermal-gravimetric analysis（TGA）,gas chromatogram（GC） and mass spectrum（MS） method have been used to study the characteristics of hydrogen sulphide that released from the co-pyrolysis of corn stalks and coals which are of different metamorphic grade.The effects of biomass on the hydrogen sulphide gas released from different coal pyrolysis have been studied.The results show that： when the biomass is blended with coals of different metamorphic grade,the quantity of hydrogen sulphide is influenced obviously.Hydrogen sulfide released from biomass and coal blending is earlier than coal′,and its quantity is more with larger proportion of biomass before 380℃.This rule results from that the biomass is pyrolyzed earlier than the coal,abundant active methyl radical and hydrogen are released from the process of biomass pyrolysis,which provide more hydrogen to combine with sulfur.Furthermore,the influence above becomes more obvious when the content of hydrogen in the coal is less.In addition,the quantity of hydrogen sulfide is decreased with the corn stalks after 380℃,which is owed to the corporate function of the accelerate effect of hydrogenation and the desulphurization effect of alkali metals minerals in biomass.

关 键 词：生物质 不同变质程度的煤 混和热解 H2S 热重质谱色谱偶联技术 

分 类 号：TQ038.1[化学工程]