文献类型：期刊文献

英文题名：Effect of Aromatic and Aliphatic Pendants in Poly(maleic acid amide-co-vinyl acetate) on Asphaltene Precipitation in Heavy Oil

作者：Xu, Jun[1];Zou, Run[1];Gai, Decheng[1];Theil, Pascal[2];Pickenbach, Linda[2];Li, Tao[1];Li, Li[1];Stuart, Martien A. Cohen[1];Guo, Xuhong[1,3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Nuremberg Inst Technol, Dept Proc Engn, D-90489 Nurnberg, Germany;[3]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Xinjiang 832000, Peoples R China

年份：2018

卷号：57

期号：31

起止页码：10701

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20182905572470);WOS:【SCI-EXPANDED(收录号:WOS:000441475700061)】；

基金：Financial support by National Natural Science and Foundation of China (21476143, 51003028), PetroChina Innovation Foundation (2016D-5007-0211), Fundamental Research Funds for the Central Universities, the Open Project of State Key Laboratory of Shihezi University (2016BTRC004), and 111 Project Grant (B08021) are gratefully acknowledged. The authors also thank Petrochina Liaohe Oilfield Company for affording oil samples and technological support.

语种：英文

外文关键词：Turbidity - Light scattering - Asphaltenes - Ultraviolet visible spectroscopy - Amides - Aromatic compounds - Aromatization - Heavy oil production - Precipitation (chemical) - Petroleum transportation

摘要：Asphaltene precipitation often brings difficulties to the recovery and transportation of heavy crude oil. Poly(maleic acid amide-co-vinyl acetate) copolymers with various aromatic (phenyl, naphthyl, and benzimidazole) pendants and/or aliphatic (octyl, tetradecyl, and octadecyl) grafts were synthesized and found to be capable of dispersing asphaltenes effectively. To study the influence of aromatic and aliphatic pendants in copolymers on asphaltene precipitation behaviors, the initial precipitation point, turbidity, and size of asphaltene precipitates from model heavy oils in the presence and absence of copolymers were determined by UV-vis spectroscopy, turbidity meter, and dynamic light scattering, respectively. The effect of copolymers on the viscosity of Tahe heavy oil with high asphaltene content was investigated by the rheological approach. The results revealed that the copolymers with both aromatic and aliphatic pendants dispersed asphaltene, reduced its precipitates, and thus improved the flowability of Tahe heavy oil more effectively than those with only aromatic or aliphatic graft. The combination of pi-pi delocalized conjugation attraction" from blocking" from pendants and "steric aliphatic grafts should be the reason.