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生物质化学工程 ›› 2014, Vol. 48 ›› Issue (6): 44-49.doi: 10.3969/j.issn.1673-5854.2014.06.008

• 研究报告 • 上一篇    下一篇

超临界CO2萃取脱除甘蔗渣木质素的研究

左林1, 程皓2, 刘江燕1,2   

  1. 1. 湖北师范学院 化学化工学院, 湖北 黄石 435002;
    2. 华南理工大学制浆造纸工程国家重点实验室, 广东 广州 510640
  • 收稿日期:2014-05-13 出版日期:2014-11-30 发布日期:2014-12-10
  • 通讯作者: 刘江燕(1962-), 男, 教授, 博士, 硕士生导师, 研究领域:植物资源化学;E-mail:liu.jy@126.com. E-mail:liu.jy@126.com
  • 作者简介:左 林(1988-), 女, 湖北襄阳人, 硕士生, 研究方向:植物资源化学与计算机模拟;E-mail:472998565@qq.com
  • 基金资助:
    稀有金属化学湖北省协同创新中心项目(无编号)

Delignification of Bagasse with CO2 Supercritical Fluid Extraction

ZUO Lin1, CHENG hao2, LIU Jiang-yan1,2   

  1. 1. College of Chemistry & Chemical Engineering, hubei Normal University, huangshi 435002, China;
    2. State Key Lab.of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2014-05-13 Online:2014-11-30 Published:2014-12-10

摘要: 采用超临界CO2萃取技术,研究了萃取条件对甘蔗渣木质素脱除规律的影响,设计正交试验方案得出纸浆得率、综纤素维含量、Klason木质素含量,进一步得出脱木质素率,以确定最优条件.结果表明,温度是影响超临界CO2脱除木质素的最主要因素.在180 ℃、 20 MPa下,用1,4-二氧六环2 mL作夹带剂反应60 min,脱木质素率达到79.61%.用GC-MS 对不同温度下超临界CO2萃取液的分析以研究在超临界CO2下甘蔗渣中木质素的溶出规律,结果表明,木质素的降解不仅发生在芳基醚键这种大分子的断裂,还导致了苯环上甲氧基的断裂.且在高温作用下,还会导致甘蔗渣中其它碳水化合物、纤维素和半纤维素的降解.

关键词: 甘蔗渣, 脱木质素, 超临界CO2, GC-MS

Abstract: This paper reported the delignification of bagasse with the supercritical fiuid of CO2 and the influence of extraction conditions.The pulp yield, holocellulose contents,and Klason lignin contents were obtained by orthogonal experiments to get the delignification rate and the optimal conditions.The experimental results showed that the temperature was the main factor that influenced the efficiency of delignification.Under the condition of 180 ℃,20 MPa,1,4-dioxane 2 mL within 60 min,the delignification rate could reach 79.61%.The GC-MS analysis of the supercritical extraction liquid under different temperature showed that the degradation of lignin not only occured by breaking the aryl-ether bonds of macromolecule,but also led to the fracture of methoxy on the benzene ring.And at high temperature,the other carbohydrates,cellulose,and hemicellulose in bagasse also degraded.

Key words: bagasse, delignification, supercritical CO2, GC-MS

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