Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment

Long-li Zhang; Hong-xin Mao; Guo-dong Zhang; Guo-hua Yang; Li Li; Chao-he Yang

doi:10.1021/acs.energyfuels.6b00453

Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment

Long-li Zhang, Hong-xin Mao, Guo-dong Zhang, Guo-hua Yang, Li Li, Chao-he Yang

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

To 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.

Original language	English (US)
Pages (from-to)	5404-5410
Number of pages	7
Journal	Energy & Fuels
Volume	30
Issue number	7
DOIs	https://doi.org/10.1021/acs.energyfuels.6b00453
State	Published - 2016
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-07-08
Acknowledgements: This 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).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

Energy Engineering and Power Technology
General Chemical Engineering
Fuel Technology

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10.1021/acs.energyfuels.6b00453

Cite this

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title = "Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment",

abstract = "To 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.",

author = "Long-li Zhang and Hong-xin Mao and Guo-dong Zhang and Guo-hua Yang and Li Li and Chao-he Yang",

note = "KAUST Repository Item: Exported on 2021-07-08 Acknowledgements: This 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). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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doi = "10.1021/acs.energyfuels.6b00453",

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AU - Zhang, Long-li

AU - Mao, Hong-xin

AU - Zhang, Guo-dong

AU - Yang, Guo-hua

AU - Li, Li

AU - Yang, Chao-he

N1 - KAUST Repository Item: Exported on 2021-07-08 Acknowledgements: This 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). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2016

Y1 - 2016

N2 - To 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.

AB - To 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.

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ER -

Relationships between Electrical Conductivity Variation and Coking Characteristics of Residue during Thermal Reaction through Online Equipment

Abstract

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