Evolution of the Pseudo-Components of Heavy Oil during Low Temperature Oxidation Processes

Renbao Zhao, Tiantian Wang, Lijuan Chen, Jingjun Pan, Shutong Li, Dong Zhao, Long Chen and Jiaying Wang
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Renbao Zhao: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Tiantian Wang: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Lijuan Chen: Xinjiang Oil Field Branch Company, PetroChina, Karamay 834000, China
Jingjun Pan: Xinjiang Oil Field Branch Company, PetroChina, Karamay 834000, China
Shutong Li: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Dong Zhao: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Long Chen: Xinjiang Oil Field Branch Company, PetroChina, Karamay 834000, China
Jiaying Wang: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

Energies, 2022, vol. 15, issue 14, 1-14

Abstract: Heavy oil was divided into different pseudo-components according to their boiling ranges through a real-boiling point distillation process, and the oxidation products for pseudo-components with a boiling range higher than 350 °C were systematically investigated during low temperature oxidation (LTO). Kinetic cell (KC) experiments were conducted under different ambient pressure conditions and temperature ranges, and the oxidation products were characterized using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). The results indicate that the oxygen addition and cracking reactions typically occur in the temperature intervals of 140–170 °C and 180–220 °C, respectively, at the given heating rate of 3.83 °C/min. Components with the mass-to-charge ratio in the region of 250–450 Da mainly evaporate in the temperature regions of 25–150 °C, which results in losses from the fraction. Considering the gas-liquid multi-phase reaction, the pseudo-components with low boiling range distributed on the surface of the liquid film are prone to generate high molecular weight compounds through oxygen addition. In contrast, the high boiling point range fractions increase in molecular weight through oxygen addition and are then subject to further cracking processes that generate lower molecular weights in the region of 200–400 Da. N 1 O 3 - and N 1 O 4 - containing compounds were determined by high resolution mass spectra, and these compounds were generated through oxygen addition of basic N 1 -containing compounds. On the basis of these reactions and the experimental results obtained, some insights related to the LTO of heavy oil, which are highly valuable for ISC field applications, are summarized.

Keywords: heavy oil; in situ combustion; pseudo-components; oxygen addition; cracking (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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