Pyrolysis-catalytic steam reforming of agricultural biomass wastes and biomass components for production of hydrogen/syngas
Pyrolysis-catalytic steam reforming of agricultural biomass wastes and biomass components for production of hydrogen/syngas
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DOI：
10.1016/j.joei.2018.10.013
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发表时间：
2019-12-01
影响因子：
5.7
通讯作者：
Williams, Paul T.
中科院分区：
文献类型：
--
作者：
Akubo, Kaltume;Nahil, Mohamad Anas;Williams, Paul T.
在两段式固定床反应器中对6种农业生物质废弃物样品及其3种主要组分进行了热解-催化水蒸气重整反应研究。生物质的热解发生在第一阶段中，随后在第二阶段催化反应器中对放出的热解气体进行催化蒸汽重整。废弃生物质样品为稻壳、椰子壳、甘蔗渣、棕榈仁壳、棉秆和麦秸，生物质组分为纤维素、半纤维素（木聚糖）和木质素。用于蒸汽重整的催化剂为10重量%的水。镍基氧化铝催化剂（NiAl 2 O3）。此外，还采用热重分析（TGA）对生物质废弃物及其组分的热分解特性进行了研究。TGA结果显示了各个生物质组分的明显峰，这在生物质废物样品中也很明显，反映了生物质废物中主要生物质组分的存在。两段式裂解-催化水蒸气重整的实验结果表明，在裂解-催化水蒸气重整过程中引入水蒸气和催化剂，可以显著提高气体产率和合成气产率，尤其是氢气的产率。例如，通过将水蒸气和催化剂引入到棕榈仁壳的热解-催化水蒸气重整中，氢组成从6.62增加到25.35 mmol g（-1）。与纤维素和半纤维素相比，木质素产生最多的氢，为25.25 mmol g（-1）。用木质素观察到最高的残余炭产生，其产生约45重量%的残余炭。炭，是纤维素和半纤维素的两倍多。(C)2018作者由Elsevier Ltd代表能源研究所出版。
The pyrolysis-catalytic steam reforming of six agricultural biomass waste samples as well as the three main components of biomass was investigated in a two stage fixed bed reactor. Pyrolysis of the biomass took place in the first stage followed by catalytic steam reforming of the evolved pyrolysis gases in the second stage catalytic reactor. The waste biomass samples were, rice husk, coconut shell, sugarcane bagasse, palm kernel shell, cotton stalk and wheat straw and the biomass components were, cellulose, hemicellulose (xylan) and lignin. The catalyst used for steam reforming was a 10 wt.% nickel-based alumina catalyst (NiAl2O3). In addition, the thermal decomposition characteristics of the biomass wastes and biomass components were also determined using thermogravimetric analysis (TGA). The TGA results showed distinct peaks for the individual biomass components, which were also evident in the biomass waste samples reflecting the existence of the main biomass components in the biomass wastes. The results for the two-stage pyrolysis-catalytic steam reforming showed that introduction of steam and catalyst into the pyrolysis-catalytic steam reforming process significantly increased gas yield and syngas production notably hydrogen. For instance, hydrogen composition increased from 6.62 to 25.35 mmol g(-1) by introducing steam and catalyst into the pyrolysis-catalytic steam reforming of palm kernel shell. Lignin produced the most hydrogen compared to cellulose and hemicellulose at 25.25 mmol g(-1). The highest residual char production was observed with lignin which produced about 45 wt.% char, more than twice that of cellulose and hemicellulose. (C) 2018 The Authors. Published by Elsevier Ltd on behalf of Energy Institute.