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Study on the Stability Colloid and Influence on Thermal Cracking of Heavy Oil

Author: JiangWenZuo
Tutor: LiuDong
School: China University of Petroleum
Course: Chemical Engineering and Technology
Keywords: Venezuelan heavy oil Colloidal stability Thermal reaction The coke
CLC: TE622.5
Type: Master's thesis
Year: 2011
Downloads: 69
Quote: 0
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Abstract


This study examined the impact of the light components , the macromolecular polymer and a surfactant on the Venezuelan heavy oil viscosity and colloidal stability , heat transfer conditions of the system and the thermal reaction conditions , the reaction coke conditions , product distribution and component change study and discussion. The study showed that the circulation of the light component to Venezuelan heavy oil fluidity improving effect to a certain extent . Heavy oil diesel or gas oil component of the mass fraction lt ; 1% , the viscosity reducing effect little difference ; dosage gt ; 1% , the magnitude of the viscosity reduction of diesel components is much larger than the wax component . Diesel components in the heavy oil , oil - like colloidal stability decreased wax components to improve oil -like colloidal stability . Either join the diesel component or wax component , the thermal reaction process of heat transfer will be improved to a certain extent ; diesel component can promote coke , coke induction period is shortened , atmospheric residue in the product coke precursor matter content decreased ; adding wax component can inhibit coke , the coke - induced prolongation , increased atmospheric residue in the product coke precursor content . In the synthesis of the viscosity reducer , SMA ( styrene - maleic anhydride - acrylate, stearyl alcohol ester terpolymers ) of heavy oil has a good viscosity reducing effect , SMA whether multiplexed with the the diesel component or wax component with can improve the colloidal stability of oil samples , and the compounding effect of SMA diesel components than with the compounding effect of wax components . The experiments show that the SMA can inhibit coke , the coke - induced prolongation ; the SMA diesel components mixed add thermal reaction , saturates and aromatics content in reducing atmospheric residue , coke precursor content increased significantly ; the thermal reaction when mixed with wax component , of atmospheric residue saturates and aromatics content increased, the coke precursors were significantly reduced . SDBS ( sodium dodecylbenzene sulfonate) can improve the colloidal stability of the heavy oil , and can improve the thermal reaction process heat transfer . SDBS will promote green coke , coke induction period is shortened . The SDBS diesel components mixed add heat reaction , coke rate decreased , coke - induced prolongation significant increase in atmospheric residue content of coke precursors . Add heat reaction when mixed with wax component , the rate of coke a slight increase in the atmospheric residue saturation points were significantly reduced, and the aromatics content increased significantly .

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The composition, properties and analysis of oil > Physical properties and measurement methods
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