Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment
KAUST DepartmentKAUST—Cornell Center of Energy and Sustainability, Cornell University, Ithaca, New York 14853, United States
Embargo End Date2022-07-07
Permanent link to this recordhttp://hdl.handle.net/10754/670051
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AbstractTo study the relationship between the electrical conductivity and the coking performance, a device for the online measurement of the conductivity of heavy oil during thermal reaction was constructed. Three samples with different fraction compositions, including Middle East atmospheric residue (ME-AR), Tahe atmospheric residue (TH-AR), and Saudi Arabia vacuum residue (SA-VR), were selected for study. The conductivity of all samples presents the peak value, before or after the end of the coke induction period. The molar conductivity of asphaltenes, resins, or aromatics in toluene solutions was measured, and the fractions were derived from SA-VR thermal reaction samples under hydrogen. The molar conductivity of asphaltenes in toluene was 20 and 2000 times more than that of resins and aromatics, indicating that the asphaltene was the most important conductive fraction in the petroleum residue. The dipole moments of fractions of SA-VR thermal reaction samples were measured. The concentration of asphaltenes went through a maximum during a reaction, which was consistent with the conductivity variation qualitatively. This work indicated that there were certain relationships between the conductivity variation and the coking characteristics of residue during thermal reaction.
CitationZhang, L., Mao, H., Zhang, G., Yang, G., Li, L., & Yang, C. (2016). Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment. Energy & Fuels, 30(7), 5404–5410. doi:10.1021/acs.energyfuels.6b00453
SponsorsThis work was partially supported by the National Nature Science Foundations of China (Grant Nos. 21576292, 21476263 and 51574062) and the Special Feature of China National Petroleum Corporation Major Scientific and Technological Project: Research and Development of the Catalyst for Petroleum Refining, and the Fundamental Research Funds for the Central Universities (Grant No. 14CX05029A).
PublisherAmerican Chemical Society (ACS)
JournalENERGY & FUELS