Removal of lignin from wheat stalk

doi:10.16085/j.issn.1000-6613.2017-0887

Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (S1): 476-481.DOI: 10.16085/j.issn.1000-6613.2017-0887

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Removal of lignin from wheat stalk

ZHAO Wei, LI Weigang, LIU Haomiao, LIU Kaishuai, AO Lei, FANG Junji, GUAN Yinshuang

College of Chemistry and Chemical Engineering, China University of Mining and Technology, Xuzhou 221000, Jiangsu, China

Received:2017-05-15 Revised:2015-05-30 Online:2017-12-13 Published:2017-12-31

麦秆中木质素的脱除

赵炜, 李伟钢, 刘浩淼, 刘开帅, 敖磊, 方君基, 关尹双

中国矿业大学化工学院, 江苏徐州 221000

通讯作者: 赵炜(1965-),女,博士,研究方向为碳资源催化转化。
作者简介:赵炜(1965-),女,博士,研究方向为碳资源催化转化。E-mail:zhaow1965@163.com。
基金资助:
江苏省自然科学基金（BK20151140）及徐州市科技（KC16SG245）项目。

Abstract

Abstract: The effects of acid treatment, base treatment, oxidation treatment and ultrasonic irradiation on the removal of lignin from wheat stalk powder (WSP) were investigated. Hemicellulose content is decreased by acid treatment and lignin content is decreased by base treatment. Hemicellulose and lignin are decreased by oxidation treatment. Ultrasonic treatment can effectively disperse WSP and make it full contact with the solvent,thereby promoting the removal of lignin. The treatment process of WSP was optimized by orthogonal experiment in order to remove lignin from WSP. The optimum conditions of treatment are that the concentrations of NaOH and H₂O₂ in alkaline and H₂O₂ mixed solution are 1mol/L and 1.5% H₂O₂, the ratio of alkaline H₂O₂ to ethanol is 1:1, and that 5g of WSP is pretreated under ultrasonic irradiation for about 5min, mixed with a mixing solution of about 20times, and then treated under ultrasonic irradiation for 5min, and then treated at a temperature of 80℃ for 3h. Under these conditions, the removal rate of lignin from WSP reaches 88%.

Key words: wheat stalk, lignin, hydrogen peroxide, ultrasonic irradiation

摘要： 分别考察了酸处理、碱处理、氧化处理和超声辐射处理对从麦秆中脱除木质素的影响。酸处理能降低半纤维素含量；碱处理能够减少木质素含量；氧化处理能减少木质素及半纤维素含量；超声处理较好的分散麦秆并使之与溶剂充分接触，进而促进木质素的脱除。通过正交实验得到从麦秆中脱除木质素的优化条件为：碱性H₂O₂的乙醇混合溶液中NaOH浓度为1mol/L、H₂O₂体积分数为1.5%、双氧水与乙醇体积比1∶1，麦秆超声预处理5min，麦秆用量为2.5g，固液比1∶20；麦秆和混合溶液超声处理5min，然后在80℃下处理3h。在此条件下，木质素脱除率可达到88%。

关键词: 麦秆, 木质素, 双氧水, 超声辐射

CLC Number:

TQ352.4

ZHAO Wei, LI Weigang, LIU Haomiao, LIU Kaishuai, AO Lei, FANG Junji, GUAN Yinshuang. Removal of lignin from wheat stalk[J]. Chemical Industry and Engineering Progress, 2017, 36(S1): 476-481.

赵炜, 李伟钢, 刘浩淼, 刘开帅, 敖磊, 方君基, 关尹双. 麦秆中木质素的脱除[J]. 化工进展, 2017, 36(S1): 476-481.

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Removal of lignin from wheat stalk

麦秆中木质素的脱除

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