基于TG-FTIR和Py-GC-MS分析的椰壳热解特性研究  

Pyrolysis Characteristics of Coconut Shell Based on TG-FTIR and Py-GC-MS Analysis

作　　者：陈强 王艳[2] 翟华敏[1] CHEN Qiang;WANG Yan;ZHAI Huamin(College of Light Industry and Food Engineering,Nanjing Forestry University,Nanjing 210037,China;Institute of Chemical Industry of Forest Products,CAF,Nanjing 210042,China)

机构地区：[1]南京林业大学轻工与食品学院,江苏南京210037 [2]中国林业科学研究院林产化学工业研究所,江苏南京210042

出　　处：《林产化学与工业》2020年第1期45-52,共8页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(31070524)

摘　　要：采用热重-红外光谱(TG-FTIR)和裂解-气相色谱-质谱联用(Py-GC-MS)技术对椰壳粉的热失重、热裂解行为及其裂解产物进行了研究。在对N2和空气气氛下椰壳的TG和DTG曲线进行分析的基础上,采用三维红外光谱对热解过程中气体产物进行在线检测,结果表明:N2气氛下,椰壳的最大失重峰温度(Tm)为347.8℃,固体残余量为32.0%,主要的气体产物是CO2;而空气气氛下椰壳的热解更完全,固体残余量仅为6.5%,且最大热失重温度为282.1℃,释放的气体除了CO2,还有CO、H2O和CH4等。Py-GC-MS分析结果表明:酚类化合物是主要的裂解产物,当温度为400℃时共检测到39种裂解产物,其中酚类化合物12种(GC含量40.0%);当温度为700℃时共检测到56种裂解产物,其中酚类化合物18种(GC含量45.8%)。The thermogravimetric,pyrolysis behavior and pyrolytic products of coconut shells meal were analyzed by thermogravimetry-Fourier transform infrared spectroscopy(TG-FTIR)and pyrolysis-gas chromatography and mass spectrometry(Py-GC-MS).Three-dimensional infrared spectroscopy was used to detect the gas products in the pyrolysis process,based on the analysis of TG and DTG curves under N 2/air atmosphere.The results showed that the maximum weight loss peak temperature(Tm)was 347.8℃,and the residual was 32.0%,CO2 was the main gas product under the N2 atmosphere.The solid residual was only 6.5%,and Tm was 282.1℃,and the released gas were CO2,CO,H2O and CH4,under the air atmosphere.Py-GC-MS results showed that phenolic compounds were the main products.There were 39 pyrolysis products,among which 12 kinds of products were phenolic compounds(GC content 40.0%)at the temperature 400℃.There were 56 pyrolysis products,among which 18 kinds of products were phenolic compounds(GC content 45.8%)at the temperature 700℃.

关 键 词：热失重 热重-红外光谱 裂解-气相色谱质谱 椰壳 热解特性 

分 类 号：TQ35[化学工程]