Citation: ZHANG Long-li, LIU Dong-dong, ZHAO Yu-sheng, YANG Guo-hua, YANG Chao-he, XING Xue-qing. Study on asphaltene aggregate size of ALVR thermal reaction samples under nitrogen atmosphere[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(1): 46-52. shu

Study on asphaltene aggregate size of ALVR thermal reaction samples under nitrogen atmosphere

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1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China;

Corresponding author: ZHANG Long-li,
Received Date: 19 April 2012
Available Online: 29 June 2012
Fund Project: 国家自然科学基金(20776160) (20776160) 中石油重大科技专项专题(固定床渣油加氢处理催化剂研究开发) (固定床渣油加氢处理催化剂研究开发) 中国石油大学(华东)"青年教师拔尖人才建设工程"基金 (华东)

Vacuum residue from Saudi Arabia light crude oil (ALVR) was thermally reacted at 395℃ under the atmosphere of nitrogen. Thermal reaction samples were obtained by online sampling device at different reaction times, and the asphaltene aggregate size was determined by small-angle X-ray scattering (SAXS) measurements. The aggregate size of asphaltene decreases from 29~21 nm in the initial stage of coke induction period; during later stage of coke induction period, the asphaltene aggregate size increases rapidly and reaches to 43 nm when thermal reaction time reaches to 150 min. After the stage of coke induction period, the asphaltene aggregate size changes little and is in the range of 46~42 nm. In the thermal reaction process of residue, the aggregate size of asphaltene is jointly affected by the thermal cracking and association-disassociation of asphaltene, but does not show obvious relationship with asphaltene content.
- vacuum residue,
- thermal reaction,
- coke ratio,
- asphaltene aggregate size
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