文献类型：期刊文献

英文题名：Pressure Effect on the Rheological Behavior of Waxy Crude Oil with Comb-Type Copolymers Bearing Azobenzene Pendant

作者：Li, Tao[1];Wang, Tongshuai[2];Xu, Jun[1];Zou, Run[1];Si, Zhongye[1];Becker, Julian[3];Li, Li[1];Stuart, Martien A. Cohen[1];Prud'homme, Robert K.[4,5];Guo, Xuhong[1,6]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA;[3]Nuremberg Inst Technol, Dept Proc Engn, D-90489 Nurnberg, Germany;[4]Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA;[5]Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA;[6]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Xinjiang 832000, Peoples R China

年份：2018

卷号：57

期号：14

起止页码：4887

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20181605022778);WOS:【SCI-EXPANDED(收录号:WOS:000430155700015)】；

基金：We thank the financial support by National Natural Science and Foundation of China (21476143, 51003028), 111 Project Grant (B08021), PetroChina Innovation Foundation (2016D-5007-0211), and the Open Project of State Key Laboratory of Shihezi University (2016BTRC004). We also thank Petrochina Liaohe Oilfield Company for affording oil samples. Staffs of High Performance Computing Center (HPCC) of East China University of Science and Technology are greatly acknowledged.

语种：英文

外文关键词：Metadata - Amides - Crude oil - Differential scanning calorimetry - Yield stress - Azobenzene

摘要：In this work, a pressure responsive poly(alpha-octadecene-co-maleic acid azobenzene amide) (Azo-MAC) was synthesized and able to enhance the flowability of waxy crude oil with asphaltenes significantly under high pressure. High-pressure UV-vis spectrometer was used to characterize its pressure response under pressures. The onset temperature and enthalpy during wax crystallization of Liaohe waxy crude oil under various pressures were determined by using high-pressure differential scanning calorimeter. The viscosity and yield stress were measured by high-pressure rheometer. On the basis of our experimental data, a mechanism was propounded that the conformation transformation from cis to trans of azobenzene groups in Azo-MAC at enhanced pressure may destroy the assembly of asphaltenes, disturb the crystallization of paraffins and thus improve the flowability of oils. Azo-MAC should be an ideal additive for exploitation and transportation of oils under high pressure.