锯末热解制备氢气的研究  

Study on Preparation of Hydrogen by Pyrolysis of Sawdust

作　　者：冯剑[1] 舒新前[1] 李钢[1] 毕冬冬[1] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083

出　　处：《化学与粘合》2007年第4期234-237,共4页Chemistry and Adhesion

基　　金：国家自然基金资助项目(90610014);北京市教委重点学科资助项目(XK102900477)

摘　　要：为了探究生物质热解制氢特性，首先进行了锯末热解过程中挥发物形成反应的研究，计算了反应动力学参数，其中200～500℃区间的反应活化能为33．01kJ／mol，600～900℃区间的活化能为6．70kJ／mol。在此基础上，利用固定床反应器进行了锯末热解制备氢气的研究，主要探讨了热解过程中氢气和其它可燃气体（包括甲烷、一氧化碳和乙烯）的体积百分数和产量随热解温度的变化规律，以及添加二氧化锰、二氧化钛、三氧化二铝和氧化钙等催化剂对热解过程的影响。得出随着温度升高，氢气和可燃气的体积百分数和产量随之升高，三氧化二铝对产气效果有较好的促进作用。此外，还研究了热解过程中固、液、气三相产物的分布状况。In order to discover the pyrolysis characteristics of biomass for preparing hydrogen, firstly the study on the reaction for forming the volatile in the process of pyrolysis of sawdust was carried out, and the reaction kinetics parameters were calculated, the activation energy was 33.01kJ/mol between 200～500℃, and 6.70 kJ/mol between 600 ～900℃. Based on these, the preparation of hydrogen by pyrolysis of sawdust with a fixed - bed reactor was studied. The regulation of change of volume fraction of hydrogen and other combustible gases, such as methane, carbon monoxide and ethylene with temperature of pyrolysis was discussed as well as the effects of adding several types of catalysts, such as MnO2, TiO2, Al2O3, and CaO on pyrolysis process. The results showed that the volume fraction of hydrogen and combustible gases and yield were improved with the rising temperature, and Al2O3 had a better promotion to produce gas. In addition, the products in solid, liquid and gaseous phases were also investigated.

关 键 词：锯末 热解 氢气 

分 类 号：TQ021.2[化学工程]