土壤中烷烃的热脱附行为及动力学特征研究  

Study on Thermal Desorption Behavior and Kinetic Characteristics of Alkanes in Soil

作　　者：任科研 王水[2] 张居兵[1] 王海鑫 李梦雅 钟道旭 REN Ke-yan;WANG Shui;ZHANG Ju-bing;WANG Hai-xin;LI Meng-ya;ZHONG Dao-xu(School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China;Engineering Research Center for Soil and Groundwater Pollution Prevention and Control in Jiangsu Province,Jiangsu Provincial Academy of Environmental Sciences,Nanjing 210036,China)

机构地区：[1]南京师范大学能源与机械工程学院,江苏南京210023 [2]江苏省土壤与地下水污染防控工程研究中心江苏省环境科学研究院,江苏南京210036

出　　处：《环境科技》2025年第2期14-18,共5页Environmental Science and Technology

基　　金：江苏省生态环境科研项目(2023001);江苏省优秀博士后人才资助计划(JB0206016).

摘　　要：采用热重-红外联动技术研究了3种典型石油烃(烷烃)组分的热脱附特性,结合烷烃热脱附产物的组分分析,揭示了烷烃热脱附规律。结果表明,不同升温速率下,3种烷烃的热脱附温度窗口均向高温区移动,且最大脱附速率随温度升高而增大;烷烃的热脱附反应活化能随升温速率呈先减小后增大趋势,15℃/min时活化能最低;相同升温速率下,碳链越短热脱附反应活化能越低;烷烃热脱附过程产生的挥发性气体组分基本相同,但各组分含量不同。研究有助于了解烷烃的热脱附行为及尾气成分,可为改进热脱附治理提供重要依据。The thermal desorption characteristics of three typical petroleum hydrocarbon(alkane)components were investigated by using thermogravimetric-infrared coupled technology.By analyzing the composition of alkane desorption products,the desorption patterns of alkanes were revealed.The results indicate that under different heating rates,the thermal desorption temperature windows of the three alkanes shift towards higher temperature regions,and the maximum desorption rates increase with temperature.The activation energy for the thermal desorption reaction of alkanes first decreases and then increases with increasing heating rates,with the lowest activation energy observed at 15℃/min.At the same heating rate,the activation energy for thermal desorption decreases as the carbon chain length shortens.The volatile gas components produced during the thermal desorption process of alkanes are essentially the same,but their contents vary.These findings contribute to understanding the thermal desorption behavior of alkanes and the composition of exhaust gases,providing important evidence for improving thermal desorption treatment.

关 键 词：烷烃 热脱附 活化能 

分 类 号：X5[环境科学与工程—环境工程]