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林产化学与工业 ›› 2016, Vol. 36 ›› Issue (3): 107-113.doi: 10.3969/j.issn.0253-2417.2016.03.016

• 研究报告 • 上一篇    下一篇

抽提预处理沙柳的热解失重特性、动力学及产物组分

张忠涛, 王文亮, 耿晶, 常建民   

  1. 北京林业大学材料科学与技术学院, 北京 100083
  • 收稿日期:2015-04-22 出版日期:2016-06-25 发布日期:2016-07-07
  • 通讯作者: 常建民,博士生导师,研究领域为生物质能源;E-mail:cjianmin@bjfu.edu.cn。 E-mail:cjianmin@bjfu.edu.cn
  • 作者简介:张忠涛(1976-),男,黑龙江哈尔滨人,教授级高工,博士,主要从事林产化工等研究工作
  • 基金资助:
    国家林业局引进国际先进林业科学技术项目(2014-4-34);国家科技部农业科技成果转化资金项目(2013GB23600671)

Pyrolysis Characteristics, Kinetics and Product Components of Extracted Salix cheilophila Schneid.

ZHANG Zhong-tao, WANG Wen-liang, GENG Jing, CHANG Jian-min   

  1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China
  • Received:2015-04-22 Online:2016-06-25 Published:2016-07-07

摘要: 为了控制和改善沙柳原料热解产物品质,对比了热水、1% NaOH和苯-乙醇(苯醇)抽提3种预处理方法,利用热重红外分析法(TG-FT-IR)和热解气质联用(Py-GC/MS)研究了预处理对沙柳热解失重特性及产物生成规律的影响。结果表明:热水和苯醇抽提预处理降低了残炭率,促进了挥发性产物的生成,而1% NaOH抽提预处理增加了残炭率;Coats-Redfern动力学分析发现,抽提预处理沙柳低温段与一级动力学拟合较好,高温段与二级动力学拟合较好,抽提预处理降低了沙柳热解活化能,有利于沙柳热解反应的进行;经过1% NaOH抽提预处理沙柳生成了较多的酚和酮类组分,经过热水抽提预处理沙柳的醛类、酚类、酸类等物质GC含量减少而酯类、醚类GC含量增加,苯醇抽提预处理沙柳各组分GC含量变化不大。

关键词: 沙柳, 抽提预处理, 热解特性, 动力学, 产物组分

Abstract: Three kinds of extraction pretreatment, including hot-water, 1% NaOH and benzene-alcohol extraction methods, were used to improve the quality of pyrolytic products derived from Salix cheilophila Schneid. The pyrolytic products were investigated by TG-FT-IR and Py-GC/MS. The Results indicated that hot-water and benzene-ethanol extractions decreased the yields of char residues while 1% NaOH extraction was in reverse. The kinetics analysis using Coats-Redfern method showed that low temperature section was fitted well with the first order kinetics, and the high section was fitted well with the second order kinetics. Extraction pretreatments had positive effect to the pyrolysis reaction because of the reduction of the activation energies. GC content of phenols and ketones were increased after the 1% NaOH extraction pretreatment. After the hot-water extraction pretreatment, the GC content of aldehydes, phenols and acids decreased while the content of esters and ethers increased. There was no obvious change in GC content of pyrolysis components with the pretreatment of benzene-ethanol extraction.

Key words: Salix cheilophila Schneid., extraction pretreatment, pyrolysis characteristic, kinetcs, product component

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