能源环境保护2024，Vol.38Issue(2)：180-189,10.DOI:10.20078/j.eep.20240312
制浆造纸厂污泥热分解特性及其动力学、热力学分析
Thermal decomposition characteristics,kinetics and thermodynamic analysis of pulp and paper mill sludge
摘要
Abstract
Pyrolysis technology holds significant potential for the harmless,resourceful,and reduced disposal of sludge in pulp and paper mills.Currently,the understanding of the thermal behavior,t-hermodynamic characteristics,and product composition during the pyrolysis process of sludge from pulp and paper mills remains incomplete.In this study,thermogravimetry-fourier transform infrared(TG-FTIR)technology was employed to investigate the thermal behavior and real-time release char-acteristics of volatile products for pulp and paper mill sludge pyrolysis at different heating rates.Addi-tionally,a multi-component parallel reaction kinetics model,kinetics compensation effect,and master plot method were used to explore the pyrolysis kinetics of organic compounds.The results indicated that the thermal decomposition of organic matter in pulp and paper sludge was primarily concentrated in the temperature range of 140～600 ℃.The pyrolysis products mainly included H2O,CH4,CO2,CO,NH3,ketones,aldehydes,carboxylic acids,phenols,aromatics,ethers,and alcohols.As the pyrolysis temperature increased(600～900 ℃),CaCO3 in the pulp and paper sludge decomposed,producing a large amount of CO2,and simultaneous reactions occurred between CO2 and pyrolytic carbon to generate CO.The parallel reaction kinetics model with four components could effectively describe the organic decomposition process of pulp and paper sludge.The average apparent activation energy for the four pseudo-components were 171.54,179.50,192.05,and 200.86 kJ/mol,with pre-exponential factor ranging from 1.74×1011～8.34×1016,1.47×1011～5.55×1013,1.40×1011～1.55×1012,and 1.67× 1010～1.34×1013 s-1,respectively.Different reaction mechanism models were followed among the various components,and the reaction mechanism models were changed with increasing conversion fraction.关键词
制浆造纸污泥/热解/动力学/热力学/热重红外Key words
Pulp and paper mill sludge/Pyrolysis/Kinetics/Thermodynamics/TG-FTIR分类
资源环境引用本文复制引用
丁蕾,陈方军,任冠龙,熊勤钢..制浆造纸厂污泥热分解特性及其动力学、热力学分析[J].能源环境保护,2024,38(2):180-189,10.基金项目
国家自然科学基金资助项目(22178123,22311530109) （22178123,22311530109）
华南理工大学国家级大学生创新创业训练计划资助项目(202310561107) （202310561107）
