秸秆生物质热解气化特性研究  

Study on Pyrolysis and Gasification Characteristics of Straw Biomass

作　　者：郭兵艳 姚锡文[1] 许开立[1] 赵志成 冯靖宸 张精津 葛一霖 GUO Bingyan;YAO Xiwen;XU Kaili;ZHAO Zhicheng;FENG Jingchen;ZHANG Jingjin;GE Yilin(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《绿色矿冶》2024年第4期90-95,100,共7页Sustainable Mining and Metallurgy

基　　金：国家重点研发计划资助项目(2021YFC3001300);国家自然科学基金项目(52004055);国家级大学生创新创业训练计划项目(231129)。

摘　　要：生物质热解气化是生物质能利用的关键技术,研究秸秆生物质的热解气化特性对于高效利用我国农村大量的生物质秸秆资源具有重要意义。本文以我国农村典型的小麦秸秆和水稻秸秆为研究对象,基于管式炉系统自行搭建了生物质热解气化实验平台,研究了小麦秸秆和水稻秸秆在N_(2)气氛中热解气化产气规律,分析了不同热解温度对其热解产气的影响机理。研究结果表明,随着热解温度的升高,秸秆热解过程中依次产生CO、CO、CH_(4)和H_(2)等4种气体,合成气中CO的含量越来越多,且在高温阶段小麦秸秆热解出现了第二次CO产率峰值;CO主要来源于纤维素热解,其次是半纤维素的热解;而CO_(2)和CH_(4)的含量出现先增加后减小的趋势,H_(2)的含量则持续升高,这是因为高温时CH_(4)受热易分解生成H_(2),同时—C C—和—CH—的断键重组及挥发分的二次裂解反应使H_(2)含量进一步升高。Biomass pyrolysis and gasification is the key technology of biomass energy utilization.It has great significance to study the pyrolysis and gasification characteristics of straw biomass for the efficient utilization of a large number of biomass straw resources in rural areas of China.In this paper,the typical wheat straw and rice straw in rural areas of China were taken as the research objects.Based on the tube furnace system,a biomass pyrolysis and gasification experimental platform was built to study the pyrolysis and gasification of wheat straw and rice straw in N_(2) atmosphere.The law of gas production was analyzed,and the influence mechanism of different pyrolysis temperatures on its pyrolysis gas production was analyzed.The results show that with the increase of pyrolysis temperature,four kinds of gases such as CO,CO,CH_(4)and H_(2)are produced in the pyrolysis process of straw.The content of CO in syngas is more and more with the increase of temperature,and the second CO yield peak appears in the pyrolysis of wheat straw at high temperature stage.CO mainly comes from cellulose pyrolysis,followed by hemicellulose pyrolysis.The content of CO_(2)and CH_(4)increases first and then decreases with the increase of the temperature,while the content of H_(2)continued to increase.This is because CH_(4)is easily decomposed into H_(2)at high temperature,and the broken bond recombination of—C C—and—CH—and the secondary cracking reaction of volatiles further increase the content of H_(2).

关 键 词：生物质 热解 气化 合成气 

分 类 号：TK6[动力工程及工程热物理—生物能]