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Advances in Energy Research Volume 8, Number 4, December 2022 , pages 265-273 DOI: https://doi.org/10.12989/eri.2022.8.4.265 |
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Coal pyrolysis behaviors at supercritical CO2 conditions |
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Hakduck Kim, Jeongmin Choi, Heechang Lim and Juhun Song
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| Abstract | ||
| In this study, a product gas yield and carbon conversion were measured during the coal pyrolysis. The pyrolysis process occurred under two different atmospheres such as subcritical (45 bar, 10C) and supercritical CO2 condition (80 bar, 35C). Under the same pressure (80 bar), the atmosphere temperature increased from 35C to 45C to further examine temperature effect on the pyrolysis at supercritical CO2 condition. For all three cases, a power input supplied to heating wire placed below coal bed was controlled to make coal bed temperature constant. The phase change of CO2 atmosphere and subsequent pyrolysis behaviors of coal bed were observed using high-resolution camcorder. The pressure and temperature in the reactor were controlled by a CO2 pump and heater. Then, the coal bed was heated by wire heater to proceed the pyrolysis under supercritical CO2 condition. | ||
| Key Words | ||
| coal pyrolysis; phase change; product gas yield; P-T diagram; Supercritical CO2 (ScCO2) | ||
| Address | ||
| Hakduck Kim: Graduate School of Convergence for Clean Energy Integrated Power Generation, Pusan National University, Republic of Korea Jeongmin Choi, Heechang Lim and Juhun Song: School of Mechanical Engineering, Pusan National University, Republic of Korea | ||
