Syngas production from pyrolysis-catalytic steam reforming of waste biomass in a continuous screw kiln reactor
Syngas production from pyrolysis-catalytic steam reforming of waste biomass in a continuous screw kiln reactor
复制标题
DOI：
10.1016/j.jaap.2012.01.010
复制
发表时间：
2012-05-01
影响因子：
6
通讯作者：
Williams, Paul T.
中科院分区：
文献类型：
--
作者：
Efika, Chidi E.;Wu, Chunfei;Williams, Paul T.
研究了以废木材为原料的生物质热解和热解油、气的催化水蒸气重整制合成气的两段连续螺杆窑反应器。合成了4种镍基催化剂NiO/Al_2O_3、NiO/CeO_2/Al_2O_3、NiO/SiO_2(采用初湿法制备)和NiO/SiO_2(采用溶胶-凝胶法制备)，并将其用于催化水蒸气重整反应。生物质在约40℃的快速升温下进行热解，在500℃的热解温度下进行热解，并在760℃的催化床上对生成的热解气体进行第二阶段重整。用气相色谱对气体进行分析，同时对新鲜和反应的催化剂进行扫描电子显微镜、热重分析、X射线能谱和光电子能谱分析。结果表明，所设计的反应器对生物质热解和催化水蒸气重整反应是有效的，当采用溶胶-凝胶法制备的NiO/SiO_2催化剂时，合成气产率最高可达54.0wt.%，最高比表面积为765m(2)g(-1)。以NiO/Al_2O_3为催化剂时，氢产率最高可达44.4%。(C)2012爱思唯尔B.V.保留所有权利。
A two-stage continuous screw-kiln reactor was investigated for the production of synthesis gas (syngas) from the pyrolysis of biomass in the form of waste wood and subsequent catalytic steam reforming of the pyrolysis oils and gases. Four nickel based catalysts; NiO/Al2O3, NiO/CeO2/Al2O3, NiO/SiO2 (prepared by an incipient wetness method) and another NiO/SiO2 (prepared by a sol-gel method), were synthesized and used in the catalytic steam reforming process. Pyrolysis of the biomass at a rapid heating rate of approximately 40 degrees C/s, was carried out at a pyrolysis temperature of 500 degrees C and the second stage reforming of the evolved pyrolysis gases was carried out with a catalytic bed kept at a temperature of 760 degrees C. Gases were analysed using gas chromatography while the fresh and reacted catalyst was analysed by scanning electron microscopy, thermogravimetric analysis, transmission electron microscopy with energy dispersive X-ray and X-ray photoelectron spectroscopy. The reactor design was shown to be effective for the pyrolysis and catalytic steam reforming of biomass with a maximum syngas yield of 54.0 wt.% produced when the sot-gel prepared NiO/SiO2 catalyst was used, which had the highest surface area of 765 m(2) g(-1). The maximum H-2 production of 44.4 vol.% was obtained when the NiO/Al2O3 catalyst was used. (C) 2012 Elsevier B.V. All rights reserved.