Characteristics of waste cooking oil pyrolysis by TG-FTIR-MS and TG-GC/MS

被引：0
|
作者：
Zhang S. [1 ,2 ]
Wang Y. [1 ]
Liu H. [1 ]
Ding B. [1 ]
机构：
[1] Engineering Research Center of Metallurgical Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming
[2] Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Gaseous product; Pyrolysis; TG-FTIR-MS; TG-GC/MS; Waste cooking oil;
D O I：
10.11817/j.issn.1672-7207.2021.04.026
中图分类号：
学科分类号：
摘要：
The combined thermogravimetric-Fourier transform infared spectromotry-mass spectrometry (TG-FTIR-MS) and thermogravimetric-gas chromatograph-mass spectrometry(TG-GC/MS) analysis were used to investigate the composition of waste cooking oil pyrolysis products evolved from thermogravimetric analyzer. The reaction process and characteristics of waste cooking oil pyrolysis were studied. The results show that the composition of gaseous products from waste cooking oil pyrolysis are diacylglycerols, monoglycerides, fatty acids, aliphatic aldehydes, aliphatic ketones, alkanes, alkenes, aromatic hydrocarbons and CO2. The composition of gaseous products changes significantly with the increase of temperature. The pyrolysis process can be divided into three stages. The first stage is ascribed to the breakage of C-O bond between the glycerol backbone and the fatty acid chain to form diacylglycerols, monoglycerides, fatty acids and aliphatic aldehydes. The second stage is attributed to the cleavage of C-O and C-C bond of ester compounds and fatty acids derived from the first stage to release fatty acids, aliphatic aldehydes, aliphatic ketones, alkanes, alkenes and CO2. The third stage is the volatilization of fatty acids and the production of alkanes, alkenes and CO2 through the decarboxylation of fatty acids and the formation of aromatic hydrocarbons through Diels-Alder reactions between conjugated dienes and substituted alkenes. © 2021, Central South University Press. All right reserved.
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页码：1297 / 1306
页数：9
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