基于TG-FTIR的生物质加压热解试验研究  

TG-FTIR ANALYSIS OF PRESSURIZED PYROLYSIS OF BIOMASS

作　　者：肖军[1] 沈来宏[1] 郑敏[1] 王泽明[1] 仲晓黎[1] 

机构地区：[1]东南大学热能工程研究所 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》2007年第9期972-978,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金项目(50306002);国家自然科学基金重大项目(20590367);国家重点基础研究发展规划项目(2003CB214500);新世纪人才支持计划(NHCET-05-0470)

摘　　要：运用热重-傅立叶红外光谱联用技术(TG-FTIR),以麦秸为对象,探讨催化与非催化条件下生物质的加压热解特性,分析研究热解压力、温度、催化剂种类对生物质热解主要析出产物的影响。通过热重TG和DTG曲线,获得相关热解特性参数及动力学参数,结果表明添加NiO和CaO的加压催化热解均促进麦秸热解反应进行,降低表观活化能,其中NiO对提高热解析出产率作用更显著。通过红外光谱对热解产物的分析表明,提高热解压力以及加入适当的催化剂NiO和CaO均有利于增加CO和CH_4的生成。而且热解压力增加提高了NiO和CaO的催化作用,其中添加NiO时,在800℃以上具有更好的催化作用,且提高压力更有利于促进CH_4的生成;而添加CaO时,提高热解压力有利于减少CO_2的生成。Pressurized pyrolysis characteristics and kinetics of biomass （wheat straw） were investigated using an advanced TG-FTIR under the catalytic and non-catalytic. The effects of pyrolysis pressure, temperature and the catalyst on the composition of the biomass volatile products were discussed. The pyrolysis parameters were obtained based on TG and DTG curves. The results show that the biomass pyrolysis can be improved by catalytic pyrolysis using nickel oxide and calcium oxide, and the nickel oxide has more remarkable effect on improving biomass pyrolysis yields. As FTIR shown, the elevated pressure and used catalysts can decrease apparent activation energy, and can increase the CO and CH4 yield. The catalysis of NiO and CaO can be improved by elevating pressure. While the temperature is higher 800℃, the nickel oxide has better catalytic effect, and elevated pressure more avail to improve CH4 yield. Whereas elevated pressure is more helpful to decrease carbon dioxide using calcium oxide.

关 键 词：热重-红外联用分析 加压 麦秸 催化热解 动力学 

分 类 号：TK6[动力工程及工程热物理—生物能]