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· 432 · 冯剑等,锯末热解制备氢气的研究 Vol. 29. No. 4, 2007
锯末热解制备氢气的研究
冯剑, 舒新前, 李钢, 毕冬冬
(中国矿业大学化学与环境工程学院,北京 100083)
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. 70 kJ /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 3,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
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固、液、气三相产物的分布状况。
关键词:锯末;热解;氢气
中图分类号: TQ 021. 2 文献标识码: A 文章编号: 1001 - 0017 (2007) 04 - 0234 - 04
Study on Preparation of Hydrogen by Pyrolysis of Sawdust
FENG Jian, SHU Xin - qian, L I Gang and B IDong - dong
(College of Chem ical and Environm ental Engineering, China University of M ining & Technology (B eijing) , B eijing 100083, China )
Abstract: In order to discover the pyrolysis characteristics of biomass for p reparing hydrogen, firstly the study on the reaction for
form ing the volatile in the p rocess of pyrolysis of sawdustwas carried out, and the reaction ics parameters were calculated, the ac
tivation energy was 33. 01kJ /mol between 200~500℃, and 6. 70 kJ /mol between 600~900℃. Based on these, the p reparation of
hydrogen by pyrolysis of sawdust with a fixed - bed reactor was studied. The regulation of change of volume fraction of hydrogen and
bustible gases, such as methane, carbon monoxide and ethylene with temperatu