Comparison of the products in vacuum pyrolysis vapors derived from non-catalytic and catalytic upgrading of camphorwood sawdust

被引：0
作者：
Fan, Yong-Sheng [1 ]
Cai, Yi-Xi [1 ]
Li, Xiao-Hua [1 ]
Yu, Ning [1 ]
Chen, Lei [1 ]
机构：
[1] School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang
来源：
Chemistry and Industry of Forest Products | 2015年 / 35卷 / 01期
关键词：
Bio-oil; Biomass; HZSM-5; catalysis; Vacuum pyrolysis;
D O I：
10.3969/j.issn.0253-2417.2015.01.011
中图分类号：
学科分类号：
摘要：
Direct catalysis of the vapors from biomass(camphorwood sawdust) vacuum pyrolysis was investigated over HZSM-5 zeolite in a two-stage fixed-bed reactor. Comparative analysis of the yield changes of each phase and the composition of the gas phase, as well as the physicochemical properties and chemical composition of bio-oil before and after catalysis was conducted. The results showed that the presence of catalyst decreased the bio-oil yield while bio-oil consisted of separable oil and aqueous phases. The H/C molar ratio, pH value and high heat value(HHV) of oil phase were 1.712, 4.93 and 37.15 MJ/kg, respectively. The use of HZSM-5 zeolite caused a remarkable increase of the target products including aromatic hydrocarbons, light phenols and alcohols, and a significant decrease of the unstable and corrosive compounds, such as carboxylic acids, aldehydes and ketones. The oil phase had higher qualities compared with raw bio-oil and could be used as an alternative fuel. The fuel added value of aqueous phase(dry basis) was also higher with HHV of 32.98 MJ/kg than that of raw bio-oil though it still contained a small amount of unstable and corrosive compounds. Transformation reactions of the non-target compounds on the HZSM-5 zeolite followed carbonium ions reaction mechanism. ©, 2015, Editorial Board of Chemistry and Industry of Forest Products. All right reserved.
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页码：70 / 76
页数：6
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