Catalytic pyrolysis of biomass components over mesoporous catalysts using Py-GC/MS
Catalytic pyrolysis of biomass components over mesoporous catalysts using Py-GC/MS
复制标题
DOI：
10.1016/j.cattod.2012.07.039
复制
发表时间：
2013-04-15
期刊：
影响因子：
5.3
通讯作者：
Park, Young-Kwon
中科院分区：
文献类型：
--
作者：
Jeon, Mi-Jin;Jeon, Jong-Ki;Park, Young-Kwon
本研究将大孔介孔材料SBA-15(SBA-15、Pt/SBA-15、AlSBA-15和Pt/AlSBA-15)用于催化裂解三种生物质组分：纤维素、半纤维素和木质素。通过对产物组成的分析，评价了催化剂的催化性能。用透射电子显微镜、X射线衍射仪、氮气吸附和NH3程序升温脱附等手段对催化剂进行了表征。结果表明，SBA-15分子筛的酸性中心较少，而AlSBA-15分子筛的酸性中心较多，有利于脱水、裂化、脱碳等反应，且AlSBA-15分子筛和铂/AlSBA-15分子筛的催化性能优于SBA-15分子筛和铂/SBA-15分子筛。特别是，在铂/AlSBA-15催化剂上进行催化改质后，呋喃和芳烃等高附加值物种的产率最高。在纤维素的热解过程中，非催化裂解的主要产物左旋葡聚糖通过催化裂解转化为呋喃、芳烃等高附加值物种。半纤维素裂解产物的催化改质也提高了呋喃、乙醇和芳烃的产率，改善了生物油的质量。催化升级的一个缺点是增加了用于纤维素和半纤维素的酸的产量，包括醋酸。木质素的催化热解增加了酚类物质的生成，特别是减少了羰基的含量。(C)2012爱思唯尔B.V.保留所有权利。
In this study, large pore mesoporous materials, SBA-15 catalysts (SBA-15, Pt/SBA-15, AlSBA-15, and Pt/AlSBA-15), were applied to catalytic pyrolysis of three biomass constituents: cellulose, hemicellulose, and lignin. The catalytic performance was evaluated by analyzing the composition of the products. The catalysts were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption, and NH3 temperature programmed desorption (NH3-TPD). SBA-15 was shown to have few acid sites, whereas AlSBA-15 had considerable amount of acid sites that are advantageous for dehydration, cracking, decarbonylation, etc. The catalytic performances of AlSBA-15 and Pt/AlSBA-15 were better than those of SBA-15 and Pt/SBA-15. In particular, catalytic upgrading over Pt/AlSBA-15 resulted in the largest yields of high value-added species like furans and aromatics. During the pyrolysis of cellulose, levoglucosan, a main product of noncatalytic pyrolysis, was converted by catalytic upgrading into high value-added species such as furans and aromatics. The catalytic upgrading of the pyrolysis product of hemicellulose also increased the yields of furan, ethanol, and aromatics, improving the quality of the bio-oil. One drawback of the catalytic upgrading was the increased production of acids including acetic acid both for cellulose and hemicellulose. Catalytic pyrolysis of lignin increased the production of phenolics, especially, with less amount of carbonyl group. (C) 2012 Elsevier B. V. All rights reserved.