An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs
In-situ combustion gasification (ISCG) is a technology in the field pilot stage used for hydrogen generation from oil reservoirs. ISCG is implemented by injecting an oxidant (pure oxygen, air, …) into the reservoir to trigger in-situ chemical reactions responsible for hydrogen generation. Pyrolysis...
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KeAi Communications Co., Ltd.
2025-06-01
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| Series: | Petroleum |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405656125000355 |
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| author | Mohamed Abdalsalam Hanfi Olalekan Saheed Alade Abdulkadir Tanimu Mohamed Mahmoud Sulaiman A. Alarifi |
| author_facet | Mohamed Abdalsalam Hanfi Olalekan Saheed Alade Abdulkadir Tanimu Mohamed Mahmoud Sulaiman A. Alarifi |
| author_sort | Mohamed Abdalsalam Hanfi |
| collection | DOAJ |
| description | In-situ combustion gasification (ISCG) is a technology in the field pilot stage used for hydrogen generation from oil reservoirs. ISCG is implemented by injecting an oxidant (pure oxygen, air, …) into the reservoir to trigger in-situ chemical reactions responsible for hydrogen generation. Pyrolysis reaction is one of the significant reactions triggered by in-situ combustion (ISC). This study used a fixed-bed micro-activity test (MAT) unit to investigate hydrogen generation from crude oil through pyrolysis. Crude oil pyrolysis experiments were conducted in the MAT unit under different temperatures (300 °C, 400 °C, 500 °C, 600 °C), atmospheric pressure, and under a flow of a nitrogen gas. The results showed that the threshold initiation temperature of hydrogen generation and coke formation was about 500 °C. The experiments demonstrated that the introduced sandstone enhanced hydrogen generation and coke formation at high temperatures. The maximum volume of hydrogen generated with sandstone effect reached 8.15 mL at 600 °C, while that without sandstone was only 6.39 mL at 600 °C. The study provides deep insights into the in-situ hydrogen generation from crude oil through pyrolysis. In addition, the obtained data of various pyrolysis products provide a comprehensive representation of crude oil pyrolysis that could promote the existing reaction models of in-situ hydrogen generation from the gasification of crude oil. The findings demonstrate the potential of adopting pyrolysis of crude oil for direct hydrogen generation from reservoirs. |
| format | Article |
| id | doaj-art-d2276e360ce241b8b83df3ac1ca81473 |
| institution | OA Journals |
| issn | 2405-6561 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum |
| spelling | doaj-art-d2276e360ce241b8b83df3ac1ca814732025-08-20T02:35:22ZengKeAi Communications Co., Ltd.Petroleum2405-65612025-06-0111336637610.1016/j.petlm.2025.05.002An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirsMohamed Abdalsalam Hanfi0Olalekan Saheed Alade1Abdulkadir Tanimu2Mohamed Mahmoud3Sulaiman A. Alarifi4Department of Petroleum Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi ArabiaCenter for Integrative Petroleum Research (CIPR), King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi ArabiaInterdisciplinary Research Center for Refining and Advanced Chemicals, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaDepartment of Petroleum Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi ArabiaDepartment of Petroleum Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia; Corresponding author.In-situ combustion gasification (ISCG) is a technology in the field pilot stage used for hydrogen generation from oil reservoirs. ISCG is implemented by injecting an oxidant (pure oxygen, air, …) into the reservoir to trigger in-situ chemical reactions responsible for hydrogen generation. Pyrolysis reaction is one of the significant reactions triggered by in-situ combustion (ISC). This study used a fixed-bed micro-activity test (MAT) unit to investigate hydrogen generation from crude oil through pyrolysis. Crude oil pyrolysis experiments were conducted in the MAT unit under different temperatures (300 °C, 400 °C, 500 °C, 600 °C), atmospheric pressure, and under a flow of a nitrogen gas. The results showed that the threshold initiation temperature of hydrogen generation and coke formation was about 500 °C. The experiments demonstrated that the introduced sandstone enhanced hydrogen generation and coke formation at high temperatures. The maximum volume of hydrogen generated with sandstone effect reached 8.15 mL at 600 °C, while that without sandstone was only 6.39 mL at 600 °C. The study provides deep insights into the in-situ hydrogen generation from crude oil through pyrolysis. In addition, the obtained data of various pyrolysis products provide a comprehensive representation of crude oil pyrolysis that could promote the existing reaction models of in-situ hydrogen generation from the gasification of crude oil. The findings demonstrate the potential of adopting pyrolysis of crude oil for direct hydrogen generation from reservoirs.http://www.sciencedirect.com/science/article/pii/S2405656125000355Hydrogen generationCrude oilIn-situ pyrolysisSandstone mineralogyPyrolysis products |
| spellingShingle | Mohamed Abdalsalam Hanfi Olalekan Saheed Alade Abdulkadir Tanimu Mohamed Mahmoud Sulaiman A. Alarifi An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs Petroleum Hydrogen generation Crude oil In-situ pyrolysis Sandstone mineralogy Pyrolysis products |
| title | An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs |
| title_full | An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs |
| title_fullStr | An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs |
| title_full_unstemmed | An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs |
| title_short | An experimental study to investigate the role of pyrolysis reaction on in-situ hydrogen generation from sandstone oil reservoirs |
| title_sort | experimental study to investigate the role of pyrolysis reaction on in situ hydrogen generation from sandstone oil reservoirs |
| topic | Hydrogen generation Crude oil In-situ pyrolysis Sandstone mineralogy Pyrolysis products |
| url | http://www.sciencedirect.com/science/article/pii/S2405656125000355 |
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