香樟木屑真空热解蒸气催化前后产物对比分析

doi:10.3969/j.issn.0253-2417.2015.01.011

林产化学与工业 ›› 2015, Vol. 35 ›› Issue (1): 70-76.doi: 10.3969/j.issn.0253-2417.2015.01.011

香樟木屑真空热解蒸气催化前后产物对比分析

樊永胜, 蔡忆昔, 李小华, 俞宁, 陈磊

江苏大学汽车与交通工程学院, 江苏镇江 212013

收稿日期:2014-05-12 出版日期:2015-02-25 发布日期:2015-03-05
通讯作者: 蔡忆昔(1957-),男,教授,博士生导师,主要从事发动机工作过程及排放控制;E-mail:qc001@ujs.edu.cn。 E-mail:qc001@ujs.edu.cn
作者简介:樊永胜(1988-),男,江苏大丰人,博士生,主要从事发动机新能源开发与利用;E-mail:yongsheng_fan@163.com
基金资助:
国家自然科学基金资助项目(51276085);江苏省自然科学基金资助项目(BK2011488);江苏省博士研究生科研创新资助项目(KYLX_1039)

Comparison of the Products in Vacuum Pyrolysis Vapors Derived from Non-catalytic and Catalytic Upgrading of Camphorwood Sawdust

FAN Yong-sheng, CAI Yi-xi, LI Xiao-hua, YU Ning, CHEN Lei

School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China

Received:2014-05-12 Online:2015-02-25 Published:2015-03-05

摘要/Abstract

摘要： 在两段式反应器上开展了对香樟木屑真空热解蒸气的在线催化提质研究。对比分析了催化前后各相产物产率和气体组成的变化,以及催化前后液相产物理化特性和化学组成。结果表明,催化后液相产物产率降低,但生物油出现分层,上层为油相,下层为水相。油相的H/C物质的量之比、pH值和高位热值(湿基)分别为1.712、4.93和37.15 MJ/kg;油相中烃类和轻质酚类等目标产物含量明显增加,而酸类、醛类和酮类等具有腐蚀性和不稳定性的化合物含量则显著降低,燃料品质较生物原油有显著提升;水相中仍含有少量腐蚀性和不稳定化合物,但其干基的高位热值达32.98 MJ/kg,除去水分后亦可将其用作替代燃料。热解蒸气中非目标产物在HZSM-5分子筛的活性位点上发生转化反应生成期望化合物,各类反应遵循碳正离子反应机理。

关键词: 生物质, 真空热解, HZSM-5催化, 生物油

Abstract: 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.

Key words: biomass, vacuum pyrolysis, HZSM-5 catalysis, bio-oil

中图分类号:

TQ35
TK6

樊永胜, 蔡忆昔, 李小华, 俞宁, 陈磊. 香樟木屑真空热解蒸气催化前后产物对比分析[J]. 林产化学与工业, 2015, 35(1): 70-76.

FAN Yong-sheng, CAI Yi-xi, LI Xiao-hua, YU Ning, CHEN Lei. Comparison of the Products in Vacuum Pyrolysis Vapors Derived from Non-catalytic and Catalytic Upgrading of Camphorwood Sawdust[J]. Chemistry and Industry of Forest Products, 2015, 35(1): 70-76.

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香樟木屑真空热解蒸气催化前后产物对比分析

Comparison of the Products in Vacuum Pyrolysis Vapors Derived from Non-catalytic and Catalytic Upgrading of Camphorwood Sawdust

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