Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale
In order to explore the potential catalysts for kerogen pyrolysis and to clear away obstacles to product liberation in product recovery, the facilitation effects of acidic chlorinated salts (MnCl<sub>2</sub>·4H<sub>2</sub>O, AlCl<sub>3</sub>·6H<sub>2</sub...
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MDPI AG
2025-04-01
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| author | Shaotao Xu Liang Xu Senhao Wang Hanxi Wang Sunhua Deng Han Wang |
| author_facet | Shaotao Xu Liang Xu Senhao Wang Hanxi Wang Sunhua Deng Han Wang |
| author_sort | Shaotao Xu |
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| description | In order to explore the potential catalysts for kerogen pyrolysis and to clear away obstacles to product liberation in product recovery, the facilitation effects of acidic chlorinated salts (MnCl<sub>2</sub>·4H<sub>2</sub>O, AlCl<sub>3</sub>·6H<sub>2</sub>O, CrCl<sub>3</sub>·6H<sub>2</sub>O, and MoCl<sub>5</sub>) on pyrolysis behavior of Huadian oil shale (OS) were investigated. Two different ways of wet mixing and dry mixing were used, and indoor pyrolysis experiments were carried out to characterize the different products collected by multiple analyses. The acidic chloride solution could effectively remove large amounts of calcite from OS during wet mixing, whereas the calcite in the dry-mixed samples decomposed significantly during pyrolysis, releasing significant amounts of CO<sub>2</sub>. AlCl<sub>3</sub> could improve the pore space by removing carbonates, which can promote the pyrolysis of kerogen and increase oil yield. The improved pore space can also promote the conversion of kerogen and the release of hydrocarbon products, while the large amounts of CO<sub>2</sub> released during pyrolysis of dry-mixed samples can promote the migration of heavy fractions. This study emphasizes the great potential of acid chlorates in counteracting reservoir blockage and facilitating pyrolysis for OS in situ exploitation. |
| format | Article |
| id | doaj-art-ea93b570a19446f388dda5f33077a32d |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-ea93b570a19446f388dda5f33077a32d2025-08-20T02:24:43ZengMDPI AGApplied Sciences2076-34172025-04-01158422510.3390/app15084225Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil ShaleShaotao Xu0Liang Xu1Senhao Wang2Hanxi Wang3Sunhua Deng4Han Wang5School of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaCollege of Construction Engineering, Jilin University, Changchun 130021, ChinaCollege of Construction Engineering, Jilin University, Changchun 130021, ChinaIn order to explore the potential catalysts for kerogen pyrolysis and to clear away obstacles to product liberation in product recovery, the facilitation effects of acidic chlorinated salts (MnCl<sub>2</sub>·4H<sub>2</sub>O, AlCl<sub>3</sub>·6H<sub>2</sub>O, CrCl<sub>3</sub>·6H<sub>2</sub>O, and MoCl<sub>5</sub>) on pyrolysis behavior of Huadian oil shale (OS) were investigated. Two different ways of wet mixing and dry mixing were used, and indoor pyrolysis experiments were carried out to characterize the different products collected by multiple analyses. The acidic chloride solution could effectively remove large amounts of calcite from OS during wet mixing, whereas the calcite in the dry-mixed samples decomposed significantly during pyrolysis, releasing significant amounts of CO<sub>2</sub>. AlCl<sub>3</sub> could improve the pore space by removing carbonates, which can promote the pyrolysis of kerogen and increase oil yield. The improved pore space can also promote the conversion of kerogen and the release of hydrocarbon products, while the large amounts of CO<sub>2</sub> released during pyrolysis of dry-mixed samples can promote the migration of heavy fractions. This study emphasizes the great potential of acid chlorates in counteracting reservoir blockage and facilitating pyrolysis for OS in situ exploitation.https://www.mdpi.com/2076-3417/15/8/4225oil shaleacidic chlorinated saltsfacilitation effectproduct compositionpore evolution |
| spellingShingle | Shaotao Xu Liang Xu Senhao Wang Hanxi Wang Sunhua Deng Han Wang Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale Applied Sciences oil shale acidic chlorinated salts facilitation effect product composition pore evolution |
| title | Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale |
| title_full | Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale |
| title_fullStr | Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale |
| title_full_unstemmed | Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale |
| title_short | Facilitation Effects of Acidic Chlorinated Salts on Reservoir Unblocking During In Situ Conversion of Huadian Oil Shale |
| title_sort | facilitation effects of acidic chlorinated salts on reservoir unblocking during in situ conversion of huadian oil shale |
| topic | oil shale acidic chlorinated salts facilitation effect product composition pore evolution |
| url | https://www.mdpi.com/2076-3417/15/8/4225 |
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