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过程工程学报 ›› 2019, Vol. 19 ›› Issue (S1): 109-114.DOI: 10.12034/j.issn.1009-606X.219160

• 绿色制造的全过程污染控制 • 上一篇    下一篇

微波烘焙预处理降解玉米秸秆

徐 霞1,2,3*， 吴 云1,2， 赵 勇1,2， 李宏强3,4， 彭 敏5， 徐 建1,2,3   

  1. 1. 安徽工业大学生物化工研究中心，安徽 马鞍山 243032 2. 安徽工业大学化学与化工学院，安徽 马鞍山 243032 3. 中国科学院过程工程研究所生化工程国家重点实验室，北京 100190 4. 北京健生药业有限公司，北京 100039 5. 安徽科达洁能股份有限公司，安徽 马鞍山 243041
  • 收稿日期:2019-02-27 修回日期:2019-04-25 出版日期:2019-06-28 发布日期:2019-06-10
  • 通讯作者: 彭敏 pmyj2000@sina.com
  • 基金资助:
    CO2酶法捕集系统中的介尺度结构和调控机制研究

Degradation of corn stover components with microwave torrefaction

Xia XU1,2,3*, Yun WU1,2, Yong ZHAO1,2, Hongqiang LI3,4, Min PENG5, Jian XU1,2,3   

  1. 1. Biochemical Engineering Research Center, Anhui University of Technology, Ma?anshan, Anhui 243032, China 2. College of Chemistry and Chemical Engineering, Anhui University of Technology, Ma?anshan, Anhui 243032, China 3. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 4. Beijing Jiansheng Pharmaceutical Co., Ltd., Beijing 100039, China 5. Keda (Anhui) Clean Energy Co., Ltd., Ma?anshan, Anhui 243041, China
  • Received:2019-02-27 Revised:2019-04-25 Online:2019-06-28 Published:2019-06-10
  • Contact: Min N.A.Peng pmyj2000@sina.com

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摘要： 用微波可高效对生物质烘焙预处理，考察了不同微波烘焙过程对玉米秸秆主要组分的降解作用及酸、碱、甘油催化剂对纤维素转化效率的影响，并对预处理的玉米秸秆进行酶解实验。结果表明，单纯的微波预处理对玉米秸秆中主要组分纤维素、半纤维素和木质素均有强烈的转化作用。无催化剂微波烘焙后，样品中纤维素含量降低了30%。在微波烘焙中添加酸、碱、甘油催化剂，可选择性降解玉米秸秆中的半纤维素或木质素，有效提高预处理后玉米秸秆中的纤维素含量，添加NaOH后纤维素含量增加最明显，由33%增至42%，纤维素最高转化率达65%。

关键词: 生物质, 微波烘焙, 预处理, 酶解

Abstract: As an indispensable step in biomass utilization chain, the current pretreatment methods cannot meet the industrial production requirements of low cost, low pollution and high efficiency. New technology development is necessary. In this work, microwave irradiation-based torrefaction pretreatment was employed to investigate the degradation of the major components in corn stover with or without catalysts. In addition, the destruction and change of corn stover structure before/after pretreatment and enzymatic hydrolysis were also studied. The results showed that the monomers of the three major components (cellulose, hemicellulose and lignin) were transformed dramatically with microwave treatment. However, they were not degraded from the polymer structure. With the presence of catalysts, the microwave torrefaction presented selective degradation effect on corn stover. The addition of acid, alkali or glycerol in the pretreatment process increased the content of cellulose. NaOH was observed to be the most effective catalyst. The cellulose content increased from 33% to 42%. The contents of other components in the solids were significantly reduced. Enzymatic hydrolysis experiments on the corn stover obtained from different pretreatments. After microwave torrefaction for 20 min, the yield of glucose increased from 12% to 17% with the enzymatic hydrolysis rate of cellulose increased from 33% to 65%. NaOH as a catalyst in the pretreatment process could significantly improve the enzymatic hydrolysis rate of cellulose. The glucose yield was increased from 12% to 30%. While the enzymatic hydrolysis of the corn stover pretreated with sulfuric acid or glycerol presented a slight effect or no effect. Microwave torrefaction increased temperature without the use of pressure vessels and organic solvents compared to single microwave irradiation process. Due to the unique advantage such as easy operation and less energy consumption, the microwave torrefaction can be developed into a practical and efficient biomass pretreatment technology.

Key words: Biomass, Microwave torrefaction, Pretreatment, Enzymatic hydrolysis