文献类型：期刊文献

英文题名：Effect of Heteroaromatic Pendants in Comb Copolymers on Paraffin Crystallization and Cold Flow Ability of Crude Oil

作者：Zhao, Hanqing[1];Xu, Jun[1];Li, Tao[1];Wang, Tongshuai[1];Wei, Xiaoming[2];Wang, Jie[1];Xu, Yisheng[1];Li, Li[1];Guo, Xuhong[1,3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Petrochina Liaohe Oilfield Co, Panjin 124010, Liaoning, Peoples R China;[3]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Shihezi 832000, Xinjiang, Peoples R China

年份：2016

卷号：30

期号：7

起止页码：5398

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20163102660358);WOS:【SCI-EXPANDED(收录号:WOS:000380523200022)】；

基金：Financial support by the National Natural Science Foundation of China (51003028, 21004021, 21306049, 21476143, and 51273063), the Fundamental Research Funds for the Central Universities, and the 111 Project Grant (B08021) is 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：Differential scanning calorimetry - Paraffins - Hydrogen bonds - Asphaltenes - Yield stress - Precipitation (chemical) - X ray diffraction

摘要：Adding comb copolymers as chemical additives is considered an effective and convenient method to improve the cold flow ability of crude oils. To improve the effectiveness of comb copolymers on the flow ability modification for crude oils with asphaltenes, poly(maleic acid amide-a-octadecene) with benzimidazolyl pendants (MACB) were designed and synthesized. In comparison to reported comb maleic anhydride copolymers (MAC) with octadecyl (MACO) or phenyl (MACP) pendants, MACB with heteroaromatic pendants are more efficient in reducing the yield stress of both model oil and Liaohe crude oil, as revealed by rheological measurements, in modifying the morphology of wax crystals, as observed by polarizing light microscopy (PLM), in lowering the wax appearance temperature (WAT) and quantity of wax precipitation, as determined by differential scanning calorimetry (DSC), and in decreasing the crystallinity of paraffins, as measured by X-ray diffraction (XRD). The benzimidazolyl pendants in MACB can provide both hydrogen bonding by amino groups and pi-pi stacking by benzyl groups with asphaltenes in crude oil, which improves the interactions with asphaltens and, thus, the effectiveness in modification the cold flow ability of crude oils.