文献类型：期刊文献

英文题名：The structure and pyrolysis product distribution of lignite from different sedimentary environment

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

机构：[1]E 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]E China Univ Sci & Technol, Anal & Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：163

起止页码：254

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20154801608530);WOS:【SCI-EXPANDED(收录号:WOS:000369204500024)】；

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

语种：英文

外文关键词：Lignite; Carbon structure; Pyrolysis product; Tar yield; Sedimentary environment

摘要：Low-temperature pyrolysis is an economically efficient method for lignite to obtain coal tar and improve its combustion calorific value. The research on the distribution of pyrolysis product (especially coal tar yield) plays an important role in energy application and economic development in the now and future. Pyrolysis test was carried out in a tube reactor at 873 K for 15 min. The structure of the lignite was measured by solid C-13 nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR). The thermal analysis was analyzed by thermo-gravimetric (TG) analyzer. The results show that the pyrolysis product distribution is related to the breakage of branch structures of aromatic ring in lignites from different sedimentary environment. The gas yield and composition are related to the decomposition of carbonyl group and the breakage of aliphatic carbon. The tar yield derived from lignite pyrolysis follows the order: Xianfeng lignite (XF, 13.67 wt.%) > Xiaolongtan lignite (XLT, 7.97 wt.%) > Inner Mongolia lignite (IM, 6.30 wt.%), which is mainly influenced by the aliphatic carbon contents, the CH2/H-3 ratio and the oxygen functional groups in lignite. The pyrolysis water yield depends on the decomposition of oxygen functional groups. IM has the highest content of oxygen-linked carbon so that the pyrolysis water yield derived from IM is the highest (9.20 wt.%), and is far more than that from the other two lignites. (C) 2015 Elsevier Ltd. All rights reserved.