文献类型：期刊文献

英文题名：Application of two-dimensional gas chromatography/time-of-flight mass spectrometry (GC?×?GC-TOFMS) for the thorough study of hydrocarbons in lignite pyrolysates

作者：Mao, Feng[1]; Wang, Jie[1]; Fan, Haojie[2]

机构：[1] Department of Chemical Engineering for Energy, East China University of Science and Technology, 130 # Meilong Road, Shanghai, 200237, China; [2] School of Mechanical Engineering, Shanghai Jiao Tong University, 800 # Dongchuan Road, Shanghai, 200240, China

年份：2021

卷号：157

外文期刊名：Journal of Analytical and Applied Pyrolysis

收录：EI(收录号：20212010359331)

语种：英文

外文关键词：Biomarkers - Acetone - Mass spectrometry - Dichloromethane - Tar - Gas chromatography - Lignite - Pyrolysis

摘要：Two-dimensional gas chromatography/time-of-flight mass spectrometry (GC × GC-TOFMS) was applied to analyze the complex molecular compositions of hydrocarbons in the four tars produced from the slow pyrolysis of a low-maturity lignite without and with the post cracking of volatile matter. The liquid (EL-tar) extracted from the lignite with the mixture solvent of acetone and dichloromethane was analyzed by way of contrast. Up to 866 hydrocarbons were identified in a lignite pyrolysis tar, in contrast to only 64 hydrocarbons found in EL-tar. It was revealed that the lignite was enriched with fatty acids and isoprene moieties, most of which were tightly incorporated in the macrostructures. The pyrolysis with the post cracking at 500 °C allowed the lignite to liberate a wide variety of biomarker hydrocarbons, which comprised a significant part of open-chain and cyclic aliphatic hydrocarbons. GC × GC-TOFMS was capable of distinguishing between various isomers of terpenoid hydrocarbons and a large array of homologues of cyclopentane/cyclopentene and cyclohexane/cyclohexene. The work has discussed the possible origins of typical biomarker hydrocarbons for the lignite studied, and also provided an insight on the variations of hydrocarbon compounds with the volatile matter cracking at different temperatures. ? 2021 Elsevier B.V.