基于CO_2原位捕集的生物质热解制氢  

Hydrogen production from biomass pyrolysis based on CO_2 in-situ capture

作　　者：田江 易春雄 米铁[1] 吴正舜[2] TIAN Jiang;YI Chunxiong;MI Tie;WU Zhengshun(Hubei Key Laboratory of Industrial Fume&Dust Pollution Control,Jianghan University,Wuhan 430056,Hubei,China;Chemistry College in Central China Normal University,Wuhan 430079,Hubei,China)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室,湖北武汉430056 [2]华中师范大学化学学院,湖北武汉430079

出　　处：《化工进展》2018年第4期1408-1413,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51676081);湖北省重点实验室开放基金(HBIK2016-03)项目

摘　　要：以谷壳作为生物质研究对象,在石英管反应器中研究了基于CO_2原位捕集的谷壳热解制H_2,考察了不同温度、不同的CO_2捕集剂(CaO)配比对其热解的产气量、气体中H_2的体积分数的影响。实验结果表明,谷壳热解的产气量随温度的升高而增大,当反应温度在800℃时有最大产气量340mL/g;捕集剂CaO的添加通过原位吸收CO_2促进相关反应向生成氢气的方向移动。在600℃,不同比例CaO下CO_2体积分数都保持在22%左右,谷壳热解产生的气体中H_2的体积分数为14%~26%;在700℃,当CaO与生物质质量比为1∶4时,添加CaO捕集剂能够较好地捕集CO_2,有效提高H_2的体积分数,此时获得较高的H_2产率41%,较低的CO_2体积分数16%,CaO的捕集率为64%;GC-MS表征分析发现,CaO在800℃的温度下对热解过程中产生的焦油有部分催化裂解效果。Using ricehusk as raw materials,CaO as a capture agent,the change of combustible gases in different temperature and different proportion of capture agent in-situ CO2 capture was investigated.The results showed that the pyrolysis gas production was significantly affected by temperatures,and there was maximum gas production of 340mL/g at 800℃.CaO sorbents promoted the reaction towards forming more hydrogen by in-situ CO2 capture.At 600℃,with CO2 concentration at 22%,the CO2 capture had nothing to do with CaO proportion.At CaO∶biomass=1∶4 in 700℃,the higher H2 yield 41%and the lower CO2 yield 16%were abtained.And the CO2 capture efficency was 64%.The GC-MS analysis showed that CaO played the role of catalytic cracking instead of temperature.

关 键 词：生物质 热解 氧化钙 CO2捕集 制氢 

分 类 号：X712[环境科学与工程—环境工程]