文献类型：期刊文献

英文题名：Relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis

作者：Liu, Peng[1];Le, Jiawei[1];Wang, Lanlan[2];Pan, Tieying[2];Lu, Xilan[1];Zhang, Dexiang[1]

机构：[1]East China Univ Sci & Technol, Dept Chem Engn Energy Resources, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Anal & Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：183

起止页码：470

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20164102887111);WOS:【SCI-EXPANDED(收录号:WOS:000391897600038)】；

基金：The authors are grateful to the National Key Basic Research Development Program of China (973Program, No. 2011CB201304) for the financial support.

语种：英文

外文关键词：Pyrolysis; Coal; Carbon structure; Coal tar; Liquid alkane

摘要：The relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis were discussed extensively. The pyrolysis tests were carried out in a tube reactor at 873 K and keep 15 min. The carbon distribution in coals was investigated by solid state C-13 nuclear magnetic resonance (N.M.R.). The curve-fitting method was used to quantify the accurate contents of structural carbon. The alkanes in coal tar were analyzed by Gas Chromatograph-Mass Spectrometer (GC-MS). The results show that oxygen-linked aromatic carbon decreases with the increasing of coal rank. The aliphatic carbon contents of Huainan (HN) coal are 44.20%, the highest among the four coals. The carbon types in coal structure have a significant influence on the formation of tar and liquid alkane. The coal tar yields are related to the aliphatic substituted aromatic carbon, CH2/CH3 ratio and oxygen-linked carbon in coal so that the increasing order of tar yield is Inner Mongolia lignite (IM, 6.30 wt.%) < Sinkiang coal (SK, 7.55 wt.%) < Shenmu coal (SM, 12.84 wt.%) < HN (16.29 wt.%). The highest contents of oxygen-linked aromatic carbon in IM lead to phenolic compound of 41.06% in IM-tar. The contents of alkane in SM-tar are the highest because the appropriate CH2/CH3 ratio and the highest aliphatic side chains on aromatic rings in SM leading to generate aliphatic hydrocarbon with medium molecular weight easily. The mechanism on formation of tar and liquid alkane plays an important role in guiding the industrialization of pyrolysis-based poly-generation producing tar with high additional value and has a significant influence on production liquid fuels and chemical feedstock from carbon-based material. (C) 2016 Elsevier Ltd. All rights reserved.