碱金属添加对香菇菌渣热解行为及动力学的影响  

Effect of Addition of Alkali Metal on Pyrolysis Behavior and Kinetics of Mushroom Residue

作　　者：丁平天 王章鸿 DING Ping-tian;WANG Zhang-hong(Ya'an Environmental Emergency Information Center,Ya'an,Sichuan,625000,China;College of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,China)

机构地区：[1]雅安市环境应急信息中心,四川雅安625000 [2]贵州民族大学生态环境工程学院,贵阳550025

出　　处：《四川环境》2024年第3期139-144,共6页Sichuan Environment

基　　金：国家自然科学基金(52260018);贵州省科技厅基础研究计划(黔科合基础-ZK[2022]一般208)。

摘　　要：为了探究金属盐存在对生物质热解过程的影响,以香菇菌渣(MR)为原料,利用碱金属对其进行预处理,基于热重分析对样品的热解行为及动力学过程进行研究。结果表明,随着KCl浓度的增加,导致MR热解向高温区移动,热解残留固体增加。相比之下,KNO3、K2SO4和NaCl的添加能够促进MR热解向低温区移动,降低热解残留固体。动力学分析表明,MR的活化能为34.03 kJ/mol,KCl浓度增加导致MR活化能增加(40.53~70.46 kJ/mol);而KNO3、K2SO4和NaCl的添加能够强化MR的分解,有效降低反应的活化能。本研究表明碱金属存在对生物质热解过程存在重要影响。To investigate the effect of metal salt on the pyrolysis process of biomass,this paper took the mushroom residue(MR)as the raw material and pretreated it with alkali metals.The thermal behavior and kinetic of the samples were analyzed using thermogravimetric analysis.The results showed that an increase in KCl concentration caused the MR pyrolysis to shift towards higher temperatures and increase pyrolysis residues.In contrast,the addition of KNO_(3),K_(2)SO_(4),and NaCl promoted the MR pyrolysis to shift towards lower temperatures and reduce pyrolysis residues.The kinetic analysis indicated that the activation energy of MR was 34.03 kJ/mol,and an increase in KCl concentration led to higher activation energy values for MR pyrolysis(40.53~70.46 kJ/mol).On the other hand,the addition of KNO_(3),K_(2)SO_(4),and NaCl enhanced the decomposition of MR and effectively reduced the activation energy of the reaction.This study demonstrates that alkali metals have a significant impact on the biomass pyrolysis process.

关 键 词：香菇菌渣 碱金属 热解 动力学 

分 类 号：X712[环境科学与工程—环境工程]