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《Acta Petrolei Sinica(Petroleum Processing Section)》 2013-05
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Mechanism of the Effect of Components Interaction on Wax Precipitation Process in Crude Oil

CHEN Gang;LI Xiaolong;ZHANG Jie;College of Chemical Engineering,Xi'an Shiyou University;  
With chromatogram separation,differential scanning calorimetry(DSC)and optical microscope methods the components of two crude oils from Changqing and Yumen oil field were separated and their effect mechanisms on the wax precipitation process were studied.The results indicated that the compositions of the two crude oils were quite different.The interaction between the components of the crude oil could inhibit the precipitation of wax crystal effectively.For the crude oil from Changqing oil field,the wax-appearing temperature decreased by 6.45℃,and the wax-appearing peak temperature decreased by 6.64℃,compared to that of the saturated hydrocarbon component(Ch1).For the crude oil from Yumen oil field,the wax-appearing temperature decreased by 3.46℃,and wax-appearing peak temperature decreased by 6.14℃,compared to that of the saturated hydrocarbon component(Y1).The behaviors of Ch1with different polarity components added were quite different from the crude oil.The addition of resin and asphaltene to Ch1increased the number of wax crystal particles and decreased their dimensions during the cooling crystallization process,which prevented the particles from contact and crosslink each other to form bulk wax crystal aggregation.
【Fund】: 陕西省科技计划项目(2012KJXX-40);; 陕西省教育厅科研计划项目(11JK0560)资助
【CateGory Index】: TE621
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