热重-红外联用分析垃圾衍生燃料的热解特性  

TG-FTIR analysis on pyrolysis characteristics of refuse-derived fuel

作　　者：柏继松[1] 余春江[1] 吴鹏[1] 方梦祥[1] 骆仲泱 

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江杭州310027

出　　处：《化工学报》2013年第3期1042-1048,共7页CIESC Journal

基　　金：国家自然科学基金项目(50976102);中央高校基本科研业务费专项资金项目;国际科技合作项目(2011DFA61060)~~

摘　　要：利用热重红外分析仪(TG-FTIR)研究了两种不同垃圾衍生燃料(RDF)的热解特性。研究发现,尽管两种RDF的来源不同,但却具有相似的热解特性,其热解过程主要分为3个阶段:生物质组分(220～430℃)、塑料类物质(430～520℃)以及无机碳酸盐(>650℃)的分解。利用Coats-Redfern法,求得了RDF热解前两个阶段的表观动力学参数,计算结果表明高温段的反应活化能要高于低温段。通过FTIR对RDF热解析出的气体进行了在线分析,发现两种RDF热解过程中的气相产物析出规律基本一致,析出的气体主要包括H2O、CO2、CO以及CH4等烃类。HCl在低温阶段(230～400℃)即析出完毕。相比之下,NH3开始析出的温度较高(260℃),并且整个析出温度范围较广,高温下仍有少量析出。SO2在热解条件下仍有相当量的生成,其析出主要集中在300～600℃的温度范围内。The pyrolysis characteristics of two different kinds of refuse-derived fuels （RDF） were investigated using thermogravimetric analysis-Fourier transform infrared spectrometer （TG-FTIR）. It was found that the pyrolysis characteristics of two RDFs were similar. The pyrolysis process could be divided into three main stages, corresponding to the decomposition of biomass components （220--430℃）, plastic substances （430--520℃） and carbonates （〉 650℃）. The Coats-Redfern method was used to analyze the apparent kinetic parameters of the first two stages, and the results showed that the activation energy was higher for the middle-temperature stage than for the low-temperature stage. By FTIR analysis, it was found that the major volatile gases released from the two RDFs were similar, mainly including H20, CO2, CO, CH4 and other hydrocarbons. The release of gaseous pollutants was paid special attention. The emission of HC1 is completed at the low temperature stage （230--400℃）. In contrast, the release of NHa begins at 260℃and goes through a much wider temperature range, and there is still a small amount of NHa release at much higher temperature. In pyrolysis condition investigated, it was surprised to detect large amount of SO2, mainly released in the temperature range of 300--600℃.

关 键 词：垃圾衍生燃料 热重-红外联用 热解 动力学参数 气相产物 

分 类 号：X705[环境科学与工程—环境工程]