| Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion | |
Lei M1; Sun C(孙岑)2,3 ; Zhang YC1
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| Corresponding Author | Sun, Cen([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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| 2020-09-17 | |
| Pages | 17 |
| ISSN | 0363-907X |
| Abstract | Physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurized O-2/N(2)and O-2/CO(2)combustion were investigated by a pressurized tube furnace with Fourier transform infrared spectroscopy and X-ray diffraction analysis. The results indicated that as the pyrolysis pressure increased, the decompositions of the aromatic ring structure and the hydroxyl hydrogen bonds of char were enhanced and the aromatic ring transformed to the low-substituted single ring. Meanwhile, the aliphatic chain and carboxyl group in the char shortened at elevated pressures. Furthermore, pressurized pyrolysis increased the degree of graphitization of the char, which further influenced the microcrystalline parameters of char. During the pyrolysis process, the decompositions of some low-temperature minerals in the char were inhibited by the elevated pressure. In addition, the effect of the furnace temperature on the mineral transformations of char was more significant than the effect of the furnace pressure. Compared to what observed at atmospheric pressure, the primary minerals in the coal ash remained the same at elevated pressure, but their relative contents changed to some extent. And, the influence of the furnace pressure on the transformations of minerals in the ash was mainly affected by the combustion temperatures of different ignition mechanisms at different pressures. Compared to the O-2/N(2)mixture, the decompositions of low-temperature minerals and the formations of high-temperature minerals were restrained due to the relatively low combustion temperature in the O-2/CO(2)mixture. And, the furnace temperature instead of the furnace pressure was the primary factor which influenced the mineral transformations of ash. |
| Keyword | ash char mineral transformation physicochemical property pressurized combustion pressurized pyrolysis |
| DOI | 10.1002/er.5739 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000569734500001 |
| WOS Keyword | OXY-FUEL COMBUSTION ; PULVERIZED COAL ; TEMPERATURE ; IMPACT |
| WOS Research Area | Energy & Fuels ; Nuclear Science & Technology |
| WOS Subject | Energy & Fuels ; Nuclear Science & Technology |
| Funding Project | National Key R&D Program of China[2016YFB0600701] ; National Key R&D Program of China[2017MS120] ; Fundamental Research Funds for the Central Univers |
| Funding Organization | National Key R&D Program of China ; Fundamental Research Funds for the Central Univers |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Sun, Cen |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85241 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.North China Elect Power Univ, Sch Energy & Power Engn, Baoding, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Lei M,Sun C,Zhang YC. Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion[J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH,2020:17.Rp_Au:Sun, Cen |
| APA | Lei M,孙岑,&Zhang YC.(2020).Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion.INTERNATIONAL JOURNAL OF ENERGY RESEARCH,17. |
| MLA | Lei M,et al."Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion".INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2020):17. |
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| Jp2020348.pdf（2521KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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