文献类型：期刊文献

英文题名：Co-pyrolysis of lignite and vacuum residue: Product distribution and hydrogen transfer

作者：Li, Yanling[1];Huang, Sheng[1];Wu, Shiyong[1];Wu, Youqing[1];Gao, Jinsheng[1]

机构：[1]East China Univ Sci & Technol, Dept Chem Engn Energy Resources, Shanghai 200237, Peoples R China

年份：2020

卷号：263

外文期刊名：FUEL

收录：;EI(收录号：20194907785613);WOS:【SCI-EXPANDED(收录号:WOS:000504834400024)】；

基金：We gratefully acknowledge financial support of this work by the National Natural Science Foundation of China (Grant No. 21506060 and No. 21878096), the National Key Basic Research and Development Program of China (Grant No. 2018YFB0604602), and the Fundamental Research Funds for the Central Universities (Grant No. 222201718003).

语种：英文

外文关键词：Hydrogen transfer; Interaction mechanism; Co-pyrolysis; Lignite; Vacuum residue

摘要：During co-pyrolysis process, hydrogen transfer, which plays an important role on the distributions and properties of products, is closely related to the interaction mechanism between raw materials. In this study, co-pyrolysis of Xilinhot lignite (XL) and vacuum residue (VR) was carried out in an aluminum retort to investigate the product distribution and hydrogen transfer, which is helpful for better understanding the potential interaction mechanism between XL and VR during co-pyrolysis process. Results indicate that, with the increasing ratio of VR, the yield of co-pyrolysis tar significantly increases, while the yields of char, water and gas decrease gradually. The hydrogen contents in co-pyrolysis tar (HP-E, 9.74-10.22 wt%) are higher than the theoretical values (HP-T, 8.64-8.87 wt%), and the contents of n-HEX solubles (nHS) in co-pyrolysis tar are also higher than expected, which are obvious evidences of the improvement of co-pyrolysis tar quality. Besides, nHS in co-pyrolysis tar contains more aliphatics and less aromatics than expected. However, there is no obvious increase on co-pyrolysis tar yield comparing with theoretical value. This may be due to that alkali and alkaline earth metals (AAEMs) in XL intensify the secondary cracking of co-pyrolysis tar, at the same time, the proportion of C-2-C-4 hydrocarbon in gaseous product is higher than expected. As for hydrogen distribution, more hydrogen transfer into tar and less hydrogen transfer into water than expected. The differences between experimental and theoretical contents of hydrogen transferred to char and gas are not significant.