Catalytic pyrolysis characteristics of simulated seawater in lean coal
In the underground catalytic gasification process of lean coal, the solid catalyst cannot be used and recovered, so it is necessary to develop an inexpensive liquid catalyst.In order to explore the feasibility of seawater as a cheap gasification agent for underground coal gasification, and to unders...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2020-02-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/271 |
| _version_ | 1828094602482024448 |
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| author | Sun Rui Ma Gaofeng Ma Guoshuai Wang Xiaoying Liang Jie |
| author_facet | Sun Rui Ma Gaofeng Ma Guoshuai Wang Xiaoying Liang Jie |
| author_sort | Sun Rui |
| collection | DOAJ |
| description | In the underground catalytic gasification process of lean coal, the solid catalyst cannot be used and recovered, so it is necessary to develop an inexpensive liquid catalyst.In order to explore the feasibility of seawater as a cheap gasification agent for underground coal gasification, and to understand the catalytic effect of NaCl component on coal pyrolysis and gasification, this paper selects the block size with 3%NaCl solution (simulated seawater) as catalyst.The lean coal of Wangxie Coal Mine of about 6cm was subjected to pyrolysis test.The heating rate inside and outside of the coal block and the composition of the pyrolysis product tar were measured.The influence of the catalyst on the semi-coke structure was studied.The results show that the temperature transfer in the process of pyrolysis of massive lean coal has hysteresis.The activation energy of large-scale coal with addition of NaCl catalyst in the temperature range of 350℃~650℃ is reduced by 39%and 45%, respectively, compared with the raw coal;catalytic pyrolysis The benzene content in tar increased by 7.8%, the hydrocarbon content of coal sample Ⅰ decreased by 14.9%, coal sample Ⅱ decreased by 32.4%;the specific surface area of catalytic pyrolysis coal char was significantly larger than that of non-catalyzed pyrolysis;The content of-OH bond and=C=O health coal Ⅱ coke < coal Ⅰ coke < raw coal.It can be concluded that seawater has a certain catalytic effect on coal pyrolysis and gasification. |
| first_indexed | 2024-04-11T07:00:28Z |
| format | Article |
| id | doaj.art-c4fc65ebe4e1437880d36aabe7312406 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-11T07:00:28Z |
| publishDate | 2020-02-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-c4fc65ebe4e1437880d36aabe73124062022-12-22T04:38:44ZengEmergency Management Press矿业科学学报2096-21932020-02-015111512110.19606/j.cnki.jmst.2020.01.01220200112Catalytic pyrolysis characteristics of simulated seawater in lean coalSun Rui0Ma Gaofeng1Ma Guoshuai2Wang Xiaoying3Liang Jie4School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaIn the underground catalytic gasification process of lean coal, the solid catalyst cannot be used and recovered, so it is necessary to develop an inexpensive liquid catalyst.In order to explore the feasibility of seawater as a cheap gasification agent for underground coal gasification, and to understand the catalytic effect of NaCl component on coal pyrolysis and gasification, this paper selects the block size with 3%NaCl solution (simulated seawater) as catalyst.The lean coal of Wangxie Coal Mine of about 6cm was subjected to pyrolysis test.The heating rate inside and outside of the coal block and the composition of the pyrolysis product tar were measured.The influence of the catalyst on the semi-coke structure was studied.The results show that the temperature transfer in the process of pyrolysis of massive lean coal has hysteresis.The activation energy of large-scale coal with addition of NaCl catalyst in the temperature range of 350℃~650℃ is reduced by 39%and 45%, respectively, compared with the raw coal;catalytic pyrolysis The benzene content in tar increased by 7.8%, the hydrocarbon content of coal sample Ⅰ decreased by 14.9%, coal sample Ⅱ decreased by 32.4%;the specific surface area of catalytic pyrolysis coal char was significantly larger than that of non-catalyzed pyrolysis;The content of-OH bond and=C=O health coal Ⅱ coke < coal Ⅰ coke < raw coal.It can be concluded that seawater has a certain catalytic effect on coal pyrolysis and gasification.http://kykxxb.cumtb.edu.cn/article/id/271lean coalnaclcatalyzepyrolysiscoal tarsemi-coking coal characteristics |
| spellingShingle | Sun Rui Ma Gaofeng Ma Guoshuai Wang Xiaoying Liang Jie Catalytic pyrolysis characteristics of simulated seawater in lean coal 矿业科学学报 lean coal nacl catalyze pyrolysis coal tar semi-coking coal characteristics |
| title | Catalytic pyrolysis characteristics of simulated seawater in lean coal |
| title_full | Catalytic pyrolysis characteristics of simulated seawater in lean coal |
| title_fullStr | Catalytic pyrolysis characteristics of simulated seawater in lean coal |
| title_full_unstemmed | Catalytic pyrolysis characteristics of simulated seawater in lean coal |
| title_short | Catalytic pyrolysis characteristics of simulated seawater in lean coal |
| title_sort | catalytic pyrolysis characteristics of simulated seawater in lean coal |
| topic | lean coal nacl catalyze pyrolysis coal tar semi-coking coal characteristics |
| url | http://kykxxb.cumtb.edu.cn/article/id/271 |
| work_keys_str_mv | AT sunrui catalyticpyrolysischaracteristicsofsimulatedseawaterinleancoal AT magaofeng catalyticpyrolysischaracteristicsofsimulatedseawaterinleancoal AT maguoshuai catalyticpyrolysischaracteristicsofsimulatedseawaterinleancoal AT wangxiaoying catalyticpyrolysischaracteristicsofsimulatedseawaterinleancoal AT liangjie catalyticpyrolysischaracteristicsofsimulatedseawaterinleancoal |