CIESC Journal ›› 2020, Vol. 71 ›› Issue (5): 2312-2319.DOI: 10.11949/0438-1157.20191391

• Energy and environmental engineering • Previous Articles     Next Articles

Effect of cellulose composition on amino acids pyrolysis

Meng GONG1(),Yang FANG1,Wei CHEN1,Yingquan CHEN1,Qiang LU3,Haiping YANG1(),Hanping CHEN1,2   

  1. 1.State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
    2.China-EU Institute for Clean and Renewable Energy, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
    3.National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
  • Received:2019-11-15 Revised:2020-02-23 Online:2020-05-05 Published:2020-05-05
  • Contact: Haiping YANG

纤维素组分对氨基酸热解的影响

宫梦1(),方阳1,陈伟1,陈应泉1,陆强3,杨海平1(),陈汉平1,2   

  1. 1.华中科技大学能源与动力工程学院煤燃烧国家重点实验室,湖北 武汉 430074
    2.华中科技大学能源与动力工程学院新能源科学与工程系,湖北 武汉 430074
    3.华北电力大学可再生能源学院生物质发电成套设备国家工程实验室,北京 102206
  • 通讯作者: 杨海平
  • 作者简介:宫梦(1996—),女,硕士研究生,gongmeng312@126.com
  • 基金资助:
    国家自然科学基金项目(51622604);国家自然科学基金面上项目(51876078)

Abstract:

The study aims to uncover the influence of cellulose components on the N-contained components pyrolysis during biomass pyrolysis process. The separation characteristics and distribution rules of pyrolysis from the main N-contained components (phenylalanine and glutamic acid), glucose unit of cellulose and mixture were analyzed by rapid pyrolysis-gas chromatography/mass spectrometry and density functional theory calculation to reveal the effect of glucose on amino acids pyrolysis. The result showed that glucose and phenylalanine mainly polymerized, and it supplied hydrogen, which promoted the deamination of phenylalanine / phenylethylamine to styrene. Glucose and glutamic acid mainly polymerized which promoted the decarboxylation and dehydration of glutamic acid to form 2-pyrrolidone. The calculation results show that the hydroxyl group at C1 of glucose provided hydrogen for the amino group connected with phenylethylamine C2, which can reduce the reaction energy barrier of phenylethylamine deamination. Combining the chain glucosyl group with glutamic acid amino group can reduce the reaction energy barrier of decarboxylation and promote the production of 2-pyrrolidone.

Key words: phenylalanine, glutamic acid, glucose, density functional theory, pyrolysis, nitrogen conversion

摘要:

本研究旨在揭示生物质热解过程中纤维素组分对含氮组分热解过程的影响,采用快速热解-气相色谱/质谱联用与密度泛函理论计算相结合分析生物质主要含氮组分(苯丙氨酸和谷氨酸)、纤维素单元葡萄糖和混合物热解过程中产物析出特性以及分布规律,揭示葡萄糖对氨基酸热解作用机理。研究发现葡萄糖与苯丙氨酸主要发生聚合反应;还会起到供氢的作用,促进苯丙氨酸/苯乙胺发生脱氨反应生成苯乙烯;而和谷氨酸主要发生聚合反应,会促进谷氨酸发生脱羧反应形成2-吡咯烷酮。计算结果表明,葡萄糖C1位羟基为苯乙胺C2连接的氨基提供氢,可以降低苯乙胺脱氨的反应能垒;链式葡萄糖醛基与谷氨酸氨基结合,可以降低脱羧的反应能垒,促进2-吡咯烷酮的生成。

关键词: 苯丙氨酸, 谷氨酸, 葡萄糖, 密度泛函理论, 热解, 氮迁移转化

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