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林产化学与工业

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (3): 75-82.doi: 10.3969/j.issn.0253-2417.2022.03.010

• 研究报告 • 上一篇    下一篇

木质素在直接生物质燃料电池中产电性能研究

杜艺飞1,2, 蒲悦2, 张力平2, 赵强2, 宋先亮1,2,*()   

  1. 1. 北京林业大学 林木生物质化学北京市重点实验室, 北京 100083
    2. 北京林业大学 林业生物质材料与能源教育部工程研究中心, 北京 100083
  • 收稿日期:2021-05-18 出版日期:2022-06-28 发布日期:2022-07-04
  • 通讯作者: 宋先亮 E-mail:sxlswd@bjfu.edu.cn
  • 作者简介:宋先亮，教授，博士，博士生导师，研究领域为生物质能源、材料及化学品、二次纤维利用及造纸化学品；E-mail: sxlswd@bjfu.edu.cn
    杜艺飞(1997—)，男，河南焦作人，硕士生，从事木质素生物质发电的研究工作
  • 基金资助:
    国家重点研发计划资助项目(2019YFB1503803-01-05);北京林业大学实验室建设与安全运行专项基金资助(BJFUSY20210911)

Power Generation Performance of Lignin in Direct Biomass Fuel Cell

Yifei DU1,2, Yue PU2, Liping ZHANG2, Qiang ZHAO2, Xianliang SONG1,2,*()   

  1. 1. Key Laboratory of Forestry Biomass Chemistry, Beijing Forestry University, Beijing 100083, China
    2. Engineering Research Center of Forestry Biomass Materials and Energy, Ministry of Education, Beijing Forestry University, Beijing 100083, China
  • Received:2021-05-18 Online:2022-06-28 Published:2022-07-04
  • Contact: Xianliang SONG E-mail:sxlswd@bjfu.edu.cn

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摘要：

通过改变溶剂体系及预处理条件，对酶解木质素(EHL)、碱木质素(AL)、木质素磺酸钠(SL)和糠醛渣(FR)，这4种类型的木质素在直接生物质燃料电池中的产电性能进行了一系列的研究，并对AL反应前后的紫外吸收光谱、红外光谱和1H NMR谱图进行了分析。研究结果表明：AL的产电性能最好，开路电压可达392.7 mV，最大功率密度为0.198 W/m2。木质素在3种不同的溶剂体系中的发电性能不同，在NaOH溶液中的产电性能最好，在NaOH+苯甲酸钠溶液中最差。水浴加热预处理对木质素的产电性能有提高作用，温度越高，处理时间越长，木质素的产电性能会越好。木质素在经紫外光照射处理时，随着时间的推移，产电性能呈现先增大后减小的趋势，在经处理24 h时产电性能最好，开路电压可以提高到431.2 mV，最大功率密度提高到0.371 W/m2。经过在燃料电池中的氧化反应，AL的紫外吸收峰产生红移和增色效应，在红外光谱中羰基吸收峰增强，1H NMR谱图中芳香族质子、酚羟基、脂肪族羟基的信号减弱，证明木质素的苯环结构已经受到一定程度的破坏，苯环上的羟基被氧化成了羰基结构。

关键词: 生物质, 碱木质素, 预处理, 发电

Abstract:

By changing the solvent system and pretreatment conditions, a series of studies were carried out on the electricity generation performance of the four types of lignin (enzymatic hydrolysis lignin(EHL), alkaki lignin(AL), sodium ligninsulfonate(SL) and furfural residue(FR))in direct biomass fuel cells. The UV spectrum, FT-IR spectrum and 1H NMR spectrum before and after the reaction of alkali lignin were analyzed. The results showed that the alkali lignin exhibited the best power generation performance, the open circuit voltage(OCV) could reach 392.7 mV, and the peak power density(PPD) was 0.198 W/m2. And lignin had the best power generation performance in NaOH solution. Water bath heating pretreatment could improve the power generation performance of lignin. The higher the temperature and the longer the treatment time, the better the power generation performance of the lignin would be. When lignin was irradiated with ultraviolet light, the electricity production performance increased first and then decreased with the passage of time. The electricity production performance was the best when it was treated for 24 hours. The OCV could be increased to 431.2 mV, and PPD was increased to 0.371 W/m2. After the oxidation reaction in the fuel cell, the benzene ring structure of lignin had been destroyed to a certain extent, and the hydroxyl group on the benzene ring had been oxidized to a carbonyl structure. The UV absorption peak of alkali lignin produced red-shift and color enhancement effects. And in the FT-IR spectrum, the carbonyl absorption peak was enhanced. Especially, the signals of aromatic protons, phenolic hydroxyl groups and aliphatic hydroxyl groups were weakened in 1H NMR spectrum.

Key words: biomass, alkali lignin, pretreatment, generate electricity

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