文献类型：期刊文献

英文题名：Selective extraction of aromatics from residual oil with subcritical water

作者：Zhu, Meng-Han[1];Liu, Yin-Dong[2];Wang, Li-Tao[2];Huang, Zi-Bin[1,3];Yuan, Pei-Qing[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Petrochina Petrochem Res Inst, Beijing 102249, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：202

起止页码：444

外文期刊名：CHEMICAL ENGINEERING RESEARCH & DESIGN

收录：;EI(收录号：20240415424790);WOS:【SCI-EXPANDED(收录号:WOS:001167926100001)】；

基金：The authors acknowledge the financial supports from NSFC (22178113) , CNPC (2023ZZ33-1) and SINOPEC (33600000-22-ZC0607- 0017) .

语种：英文

外文关键词：Subcritical water; Extraction; Aromatics; Heavy oil; Hansen solubility parameters

摘要：Based on theoretical calculations and experimental characterizations, the extraction of heavy oil components using subcritical water (Sub-CW) as an extraction solvent was studied in the temperature range of 250-325( degrees)C. According to theoretical calculations, small-scale polycyclic aromatic hydrocarbons (PAHs) are preferentially dissolved in Sub-CW. Meanwhile, the dissolution of heavy oil molecules with large-scale aromatic structures and heterocyclic rings in Sub-CW is hindered. The increase in temperature reduces the hydrogen bonding force between water molecules and the van der Waals repulsion between Sub-CW and PAHs, promoting the dissolution of PAHs in Sub-CW. Extraction experiments applied in a semi-continuous device confirm that Sub-CW selectively extracts aromatic hydrocarbons from heavy oil. Increasing extraction temperature increases the yield of the extract. The aromatic hydrocarbon content in the extract at 325 C reaches 80 wt%, which is 27 wt% higher than feedstock value. In addition, the asphaltene content in the extract is reduced from the feedstock value of 14 wt% to 2 wt%.