生物质热解的TGA-FTIR分析  

TGA-FTIR ANALYSIS OF BIOMASS PYROLYSIS

作　　者：任强强[1] 赵长遂[1] 庞克亮[1] 

机构地区：[1]东南大学洁净煤发电及燃烧技术教育部重点实验室,南京210096

出　　处：《太阳能学报》2008年第7期910-914,共5页Acta Energiae Solaris Sinica

摘　　要：基于TGA-FTIR联用技术,在线分析研究稻壳、稻秆及麦秆3种典型生物质在不同升温速率下的热解特性。分析生物质种类及升温速率对生物质的热解动力学参数及热解产物的影响。研究表明:由于生物质组成不同,其热失重特性也不同,生物质热解反应的活化能较低,为40～60 kJ·mol^(-1);红外分析表明试验用生物质热解过程中产物的析出规律相似,热解初始阶段先析出游离水,随后发生解聚和脱水反应,生成各种烃类、醇类、醛类和酸类等物质。随后,这些大分子物质又二次降解为一氧化碳为主的气体产物。The pyrolysis behavior of three typical agricultural residues, rice husk, rice straw and wheat straw was studied at different heating rates by thermogravimetric analysis （TGA） coupled with Fourier transform infrared （FTIR） spectroscopy. The pyrolysis characteristics from different kinds of biomass at different heating rates were discussed. The results showed that the characteristics of products releasing are the same for the three samples during pyrolysis. The weight loss for different kinds of biomass from pyrolysis is not the same due to different constituents in the biomass. The activation energy from biomass pyrolysis is low, which varies from 40 k J·mol^-1 to 60 k J·mol^-1. The FTIR analysis indicates that free water releases out first during biomass pyrolysis, followed depolymerization and dehydration. Then a series of hydrocarbons, alcohols, aldehydes, acids, etc. are formed. Subsequently these large-molecule compounds decompose further into gases, such as carbon monoxide.

关 键 词：生物质 热重分析 热解 热重-红外联用 

分 类 号：TK6[动力工程及工程热物理—生物能]