| Investigation on performance characteristics and thermal analysis of underground coal gasification in porous media based on non-steady flow | |
Cui, Chunxue1; Liu YW(刘曰武)1,2 ; Chai, Xiaolong3,4; Tian, Leng3,4
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| Corresponding Author | Chai, Xiaolong([email protected]) |
| Source Publication | FUEL
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| 2025-06-01 | |
| Volume | 389Pages:11 |
| ISSN | 0016-2361 |
| Abstract | Underground coal gasification (UCG), is a type of efficient and clean coal mining technology with clearly defined import and export parameters but undefinable internal reactions. This makes it challenging to ascertain the gasification process, characteristics of gas production, material transport, etc. This paper takes a two-dimensional underground gasification zone as the simulation object, a new mathematical model of unsteady flow transfer and chemical reactions in porous media is proposed based on the coupling characteristics of heat and mass transfer, flow in porous media, and combustion gasification reaction in underground coal gasification process. The instantaneous temperature and gas component changes in the gasification tunnel, as well as the connection between gas production and characteristic fields are studied by writing and discretizing the multiphysics coupling mathematical model in the FORTRAN language. The results show that the oxygen content has a significant effect on the distribution of CO2 and CO concentration in the tunnel, but has little effect on H2. The calorific value increasing by about 0.15 MJ/m3 when the oxygen content increases by 20 %. The area ratio between oxidation zone and reduction zone gradually increases from 0 to 2.5. The model derived in this paper is accurate and reliable, it can be used to optimize the parameters of the underground coal gasification process and increase the efficiency of gas production. |
| Keyword | Underground coal gasification Multiphysics coupling model Gasification characteristics Heat and mass transfer Oxygen content |
| DOI | 10.1016/j.fuel.2025.134629 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001426325200001 |
| WOS Keyword | CAVITY GROWTH ; SIMULATION ; CONTEXT |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Project | National Natural Science Foundation of China[51974329] ; National Major Science and Technology Projects of China[2016ZX05047-005-001] |
| Funding Organization | National Natural Science Foundation of China ; National Major Science and Technology Projects of China |
| Classification | 一类 |
| Ranking | 2 |
| Contributor | Chai, Xiaolong |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/100135 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China; 4.China Univ Petr, Inst Petr Engn, Beijing 102249, Peoples R China |
| Recommended Citation GB/T 7714 | Cui, Chunxue,Liu YW,Chai, Xiaolong,et al. Investigation on performance characteristics and thermal analysis of underground coal gasification in porous media based on non-steady flow[J]. FUEL,2025,389:11.Rp_Au:Chai, Xiaolong |
| APA | Cui, Chunxue,刘曰武,Chai, Xiaolong,&Tian, Leng.(2025).Investigation on performance characteristics and thermal analysis of underground coal gasification in porous media based on non-steady flow.FUEL,389,11. |
| MLA | Cui, Chunxue,et al."Investigation on performance characteristics and thermal analysis of underground coal gasification in porous media based on non-steady flow".FUEL 389(2025):11. |
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