文献类型：期刊文献

英文题名：Experimental study on vacuum residuum upgrading through pyrolysis in supercritical water

作者：Zhao, Li-Qun[1]; Cheng, Zhen-Min[1]; Ding, Yong[1]; Yuan, Pei-Qing[1]; Lu, Shan-Xiang[1]; Yuan, Wei-Kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem React Engn, Shanghai 200237, Peoples R China

年份：2006

卷号：20

期号：5

起止页码：2067

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20064210176869);WOS:【SCI-EXPANDED(收录号:WOS:000240615500045)】；

语种：英文

外文关键词：Molecular weight - Pyrolysis - Resins - Supercritical fluids - Temperature - Vacuum - Viscosity - Water

摘要：Vacuum residuum ( VR) upgrading through pyrolysis in supercritical water was investigated in a bomb reactor and a batch autoclave. The experiments were carried out in the temperature range of 380- 460 C at 25.0 MPa for 5- 120 min with a water/ VR ratio of 0.78: 1- 4: 1 by weight. The upgrading leads to a reduction of 30.9% in resins and asphaltenes, a reduction of 22.8% in aromatics, and an increase of 98.6% in saturates. The viscosity of the product was reduced from 116 mPa s of the feedback to 6.2 mPa s, which is approximately 179 times. Besides, the average molecular weight was reduced from 1860 to 646 g mol(-1), and S, N, Ni, and V contents were reduced by 32, 15, 83, and 85%, respectively. The upgrading mechanism was proposed as ionic and radical reactions in parallel.