文献类型：期刊文献

英文题名：Study on structure control and pour point depression mechanism of comb-type copolymers

作者：Huang, Zihao[1];Pu, Xin[1];Hu, Jiawen[1];Gu, Jin[1];Liu, Jichang[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi, Peoples R China

年份：2021

卷号：39

期号：19-20

起止页码：777

外文期刊名：PETROLEUM SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20213710878540);WOS:【SCI-EXPANDED(收录号:WOS:000693083700001)】；

基金：Financial support from Joint Fund by the National Natural Science Foundation of China and PetroChina (Project U1862204) and National Science Foundation for Young Scientists of China (No. 22008070).

语种：英文

外文关键词：Average molecular weight; crude oil; pour point depressant; pour point depressing mechanism; wax crystal size

摘要：A series of poly (n-alkyl acrylate-maleic anhydride) with different molecular weights were prepared as pour point depressants (PPDs) for JENM waxy crude oil obtained from the China-Myanmar crude oil pipeline. The crystallization temperature, wax morphology, and rheological behavior of crude oil were analyzed by differential scanning calorimetry, polarizing microscope, and rotary rheometer, respectively. The results indicate that the molecular weight significantly affects the performance of the pour point depressant. When the weight-average molecular weight (Mw) of copolymers were ranging from 60,000 to 70,000, it has a better pour point depression effect for JENM crude oil. The added copolymer (MW = 68,300) has achieved optimal performance which decreased the pour point of crude oil from 30 to 19 degrees C and crystallization temperature from 39.5 to 36.1 degrees C with the smallest wax crystal size and the 96.7% reduction viscosity.