Impact of alkyl methacrylate-maleic anhydride-alkyl methacrylate terpolymers as cold flow improver on crystallization behavior of diesel fuel

被引:19
作者
Han, Sheng [1 ,2 ,3 ]
Wang, Peng [3 ]
Wang, Yuhong [2 ]
Song, Yuping [1 ,4 ]
Ren, Tianhui [1 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
[2] Shanghai Inst Technol, Dept Chem Engn, Shanghai 200233, Peoples R China
[3] Shanghai Hiri Lubricants R&D Ctr, Shanghai 200233, Peoples R China
[4] Dushanzi Petrochem Co, Res Inst, Dushanzi 833600, Peoples R China
关键词
Alkyl methacrylate-maleic anhydride-alkyl methacrylate terpolymers; Cold flow improver; Crystallization; Diesel fuel; POUR POINT DEPRESSANT; BLENDS; CLOUD;
D O I
10.1016/j.psep.2009.09.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Alkyl methacrylate-maleic anhydride-alkyl methacrylate terpolymers (MR1-MA-MR2) is one of the widely used cold flow improver. In order to develop more efficient MR1-MA-MR2, it is necessary to study the crystallization behavior of n-alkanes when adding MR1-MA-MR2 into diesel fuel. In this paper, MR1-MA-MR2 is prepared by the reaction of long-chain alkyl methacrylate (MR1), maleic anhydride (MA), and short alkyl methacrylate (MR2). The diesel fuel before and after adding MR1-MA-MR2 is in situ filtrated at its cold filter plugging point (CFPP) in a manual CFPP apparatus. Extensive measurements of composition variation of n-alkanes are done by gas chromatograph and the results are compared. The experimental results show that after adding MR1-MA-MR2, the concentration distribution of n-alkanes in the filtrate is wide and arranges from 8 to 26, and mainly centralizes from 10 to 19. For the precipitate, the concentration distribution of n-alkanes gets richer in the lighter n-alkanes and poorer in the heavier n-alkanes. The concentration distribution of n-alkanes in the crystal solid shows a decreasing trend, especially with high carbon number n-alkanes (heavier than C-20). About 60-70% of the residual crystal solid is composed of non-paraffins such as isoparaffin, naphthene and other components. Crystallinities of n-alkanes show a slow decrease trend from C-8 to C-20. When the carbon number n-alkanes are heavier than C-20, the crystallinities of n-alkanes begin to sharply reduce with an increase of carbon number. The largest decline of crystallinity is C-26 n-alkane from 38.39% to 7.90%. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:41 / 46
页数:6
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