A Study on Pyrolysis Characteristics and Product Release Mechanisms of Oil Shale
4 affiliations
- 1Sinopec Northwest Oilfield Company , No. 466 Changchun South Road , Xinshi District, , ,
- 2Sinopec Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-Vuggy Reservoirs , No. 466 Changchun South Road , Xinshi District, , ,
- 3PetroChina Southwest Oil & Gasfield Company , , No. 12 Tianfu Avenue North, Chengdu High-Tech Zone , , ,
- 4Southwest Petroleum University , , No. 8 Xindu Avenue , Xindu District, , ,
Abstract
To investigate the effects of reaction atmosphere on the oxidative thermal conversion and product-evolution characteristics of oil shale, Maoming oil shale and its extracted kerogen were examined by thermogravimetric analysis (TG) and simultaneous thermal analysis coupled with Fourier-transform infrared spectroscopy and mass spectrometry (STA-FTIR-MS) under air and nitrogen. The oil-shale mass-loss process was divided into three characteristic stages. In the present experiments, the onset of the principal mass-loss region under air occurred approximately 50 °C earlier than under nitrogen, and kerogen displayed pronounced exothermic behavior in air but a mild endothermic response in nitrogen. Isoconversional OFW and DAEM analyses yielded atmosphere-dependent apparent kinetic parameters; because oxidation, oxygen uptake, volatilization, and combustion may overlap during heating in air, these parameters describe the overall mass-change process and are not interpreted as intrinsic thermal-cracking barriers directly comparable with those obtained under nitrogen. The uncalibrated MS signals and FTIR spectra show distinct atmosphere-dependent evolution profiles for H2, H2O, CH4, CO2, and light hydrocarbons. These observations identify differences in product-evolution temperature ranges and relative signal profiles but do not establish absolute product yields, a carbon balance, or a unique reaction pathway. The results support further laboratory-scale evaluation of air-assisted conversion, while field-scale feasibility requires quantitative heat-balance, oxygen-demand, heat-loss, front-stability, and energy-efficiency assessments.
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BibTeX
@article{li2026study,
title = {{A Study on Pyrolysis Characteristics and Product Release Mechanisms of Oil Shale}},
author = {Jinghui Li and Xihe Yu and Yong Li and Tingting Li and Min Yang and Xian Li and Junyi Xie and Yibo Li},
journal = {ACS Omega},
year = {2026},
month = oct,
doi = {10.1021/acsomega.6c08234},
url = {https://pubs.acs.org/acsodf/article/11/41/63801/5446516/A-Study-on-Pyrolysis-Characteristics-and-Product},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - A Study on Pyrolysis Characteristics and Product Release Mechanisms of Oil Shale
AU - Jinghui Li
AU - Xihe Yu
AU - Yong Li
AU - Tingting Li
AU - Min Yang
AU - Xian Li
AU - Junyi Xie
AU - Yibo Li
PY - 2026
DA - 2026/10/07
JO - ACS Omega
DO - 10.1021/acsomega.6c08234
UR - https://pubs.acs.org/acsodf/article/11/41/63801/5446516/A-Study-on-Pyrolysis-Characteristics-and-Product
AB - To investigate the effects of reaction atmosphere on the oxidative thermal conversion and product-evolution characteristics of oil shale, Maoming oil shale and its extracted kerogen were examined by thermogravimetric analysis (TG) and simultaneous thermal analysis coupled with Fourier-transform infrared spectroscopy and mass spectrometry (STA-FTIR-MS) under air and nitrogen. The oil-shale mass-loss process was divided into three characteristic stages. In the present experiments, the onset of the principal mass-loss region under air occurred approximately 50 °C earlier than under nitrogen, and kerogen displayed pronounced exothermic behavior in air but a mild endothermic response in nitrogen. Isoconversional OFW and DAEM analyses yielded atmosphere-dependent apparent kinetic parameters; because oxidation, oxygen uptake, volatilization, and combustion may overlap during heating in air, these parameters describe the overall mass-change process and are not interpreted as intrinsic thermal-cracking barriers directly comparable with those obtained under nitrogen. The uncalibrated MS signals and FTIR spectra show distinct atmosphere-dependent evolution profiles for H2, H2O, CH4, CO2, and light hydrocarbons. These observations identify differences in product-evolution temperature ranges and relative signal profiles but do not establish absolute product yields, a carbon balance, or a unique reaction pathway. The results support further laboratory-scale evaluation of air-assisted conversion, while field-scale feasibility requires quantitative heat-balance, oxygen-demand, heat-loss, front-stability, and energy-efficiency assessments.
SN - 2470-1343
ER -