Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke
Inorganic components in coal play a significant role during the supercritical water gasification (SCWG) process. This study comprehensively investigated the effect of major mineral components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, and CaO) on the SCWG of s...
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MDPI AG
2024-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/5/1193 |
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| author | Panpan Sun Zhaobin Lv Chuanjiang Sun Hui Jin Long He Tong Ren Zening Cheng |
| author_facet | Panpan Sun Zhaobin Lv Chuanjiang Sun Hui Jin Long He Tong Ren Zening Cheng |
| author_sort | Panpan Sun |
| collection | DOAJ |
| description | Inorganic components in coal play a significant role during the supercritical water gasification (SCWG) process. This study comprehensively investigated the effect of major mineral components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, and CaO) on the SCWG of semi-coke with/without K<sub>2</sub>CO<sub>3</sub>. The inhibition/promotion mechanism and conversion of mineral chemical components were explored. The results showed that, without K<sub>2</sub>CO<sub>3</sub>, CaO promoted gasification because CaO’s adsorption of CO<sub>2</sub> contributed to the fixed carbon steam reforming reaction and the catalysis of highly dispersed calcite. When K<sub>2</sub>CO<sub>3</sub> was added, SiO<sub>2</sub> and CaO were prone to sintering and agglomeration due to the formation of low-melting-point minerals, which hindered further gasification of fine carbon particles. Al<sub>2</sub>O<sub>3</sub> prevented the aggregation of slags, increased the probability of fine carbon particles contacting SCW and K<sub>2</sub>CO<sub>3</sub>, and promoted complete gasification. This study’s results may provide theoretical guidance for the directional control of minerals in coal during SCWG, and complete gasification of solid-phase carbon can be achieved by properly adjusting the mineral components. |
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| format | Article |
| id | doaj.art-6c263570a3894627ac88eabf6a0652b8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-25T00:31:10Z |
| publishDate | 2024-03-01 |
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| record_format | Article |
| series | Energies |
| spelling | doaj.art-6c263570a3894627ac88eabf6a0652b82024-03-12T16:43:41ZengMDPI AGEnergies1996-10732024-03-01175119310.3390/en17051193Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-CokePanpan Sun0Zhaobin Lv1Chuanjiang Sun2Hui Jin3Long He4Tong Ren5Zening Cheng6College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, ChinaCollege of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaInorganic components in coal play a significant role during the supercritical water gasification (SCWG) process. This study comprehensively investigated the effect of major mineral components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, and CaO) on the SCWG of semi-coke with/without K<sub>2</sub>CO<sub>3</sub>. The inhibition/promotion mechanism and conversion of mineral chemical components were explored. The results showed that, without K<sub>2</sub>CO<sub>3</sub>, CaO promoted gasification because CaO’s adsorption of CO<sub>2</sub> contributed to the fixed carbon steam reforming reaction and the catalysis of highly dispersed calcite. When K<sub>2</sub>CO<sub>3</sub> was added, SiO<sub>2</sub> and CaO were prone to sintering and agglomeration due to the formation of low-melting-point minerals, which hindered further gasification of fine carbon particles. Al<sub>2</sub>O<sub>3</sub> prevented the aggregation of slags, increased the probability of fine carbon particles contacting SCW and K<sub>2</sub>CO<sub>3</sub>, and promoted complete gasification. This study’s results may provide theoretical guidance for the directional control of minerals in coal during SCWG, and complete gasification of solid-phase carbon can be achieved by properly adjusting the mineral components.https://www.mdpi.com/1996-1073/17/5/1193supercritical water gasificationsemi-cokemineral componentsgasification effect |
| spellingShingle | Panpan Sun Zhaobin Lv Chuanjiang Sun Hui Jin Long He Tong Ren Zening Cheng Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke Energies supercritical water gasification semi-coke mineral components gasification effect |
| title | Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke |
| title_full | Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke |
| title_fullStr | Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke |
| title_full_unstemmed | Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke |
| title_short | Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke |
| title_sort | experimental investigation of the effects of inorganic components on the supercritical water gasification of semi coke |
| topic | supercritical water gasification semi-coke mineral components gasification effect |
| url | https://www.mdpi.com/1996-1073/17/5/1193 |
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