Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production
Spherical SrFeO3 pellets are used for effective syngas and CO production during coke oven gas reforming (COGR) and CO2 splitting (CS), exhibiting a high CH4 oxidation activity and suppressing reduction by H2 and CO during methane reforming (MR). Above 850 °C, MR produces H2-rich syngas through simul...
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Elsevier
2025-07-01
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| Series: | Journal of CO2 Utilization |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982025000964 |
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| author | Sang-Hyeok Kim Seolhwa Yun Jung-Hyun Lee Il-Hyun Baek Sung-Chan Nam Jong Tak Jang |
| author_facet | Sang-Hyeok Kim Seolhwa Yun Jung-Hyun Lee Il-Hyun Baek Sung-Chan Nam Jong Tak Jang |
| author_sort | Sang-Hyeok Kim |
| collection | DOAJ |
| description | Spherical SrFeO3 pellets are used for effective syngas and CO production during coke oven gas reforming (COGR) and CO2 splitting (CS), exhibiting a high CH4 oxidation activity and suppressing reduction by H2 and CO during methane reforming (MR). Above 850 °C, MR produces H2-rich syngas through simultaneous reduction and CH4 decomposition reactions. For sequential CS, CO production is amplified owing to the co-occurrence of CO2 splitting and reverse Boudouard reactions. The redox reaction time is optimized to realize MR–CS cycling with a high redox stability and coke utilization efficiency. From the third MR–CS cycle onward, the reoxidation percentage exceeds 96.4 %, consistent with crystal structure evolution. Amorphous carbon is deposited on SrFeO3−δ via the decomposition of CH4 during MR, and the content of this carbon remains constant after the 10th MR–CS cycle because of its high reactivity toward CO2. Over 10 COGR–CS cycles, superior coke utilization due to the occurrence of the reverse Boudouard reaction during COGR results in stable syngas and CO production from the second cycle onward. |
| format | Article |
| id | doaj-art-4117229b0bbb4f0d9b05c7d29ebc7002 |
| institution | OA Journals |
| issn | 2212-9839 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj-art-4117229b0bbb4f0d9b05c7d29ebc70022025-08-20T02:05:09ZengElsevierJournal of CO2 Utilization2212-98392025-07-019710311210.1016/j.jcou.2025.103112Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO productionSang-Hyeok Kim0Seolhwa Yun1Jung-Hyun Lee2Il-Hyun Baek3Sung-Chan Nam4Jong Tak Jang5CCS Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of KoreaCCS Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of KoreaDepartment of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of KoreaCCS Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of KoreaCCS Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of KoreaCCS Research Department, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea; Corresponding author.Spherical SrFeO3 pellets are used for effective syngas and CO production during coke oven gas reforming (COGR) and CO2 splitting (CS), exhibiting a high CH4 oxidation activity and suppressing reduction by H2 and CO during methane reforming (MR). Above 850 °C, MR produces H2-rich syngas through simultaneous reduction and CH4 decomposition reactions. For sequential CS, CO production is amplified owing to the co-occurrence of CO2 splitting and reverse Boudouard reactions. The redox reaction time is optimized to realize MR–CS cycling with a high redox stability and coke utilization efficiency. From the third MR–CS cycle onward, the reoxidation percentage exceeds 96.4 %, consistent with crystal structure evolution. Amorphous carbon is deposited on SrFeO3−δ via the decomposition of CH4 during MR, and the content of this carbon remains constant after the 10th MR–CS cycle because of its high reactivity toward CO2. Over 10 COGR–CS cycles, superior coke utilization due to the occurrence of the reverse Boudouard reaction during COGR results in stable syngas and CO production from the second cycle onward.http://www.sciencedirect.com/science/article/pii/S2212982025000964Coke oven gas reformingSyngasSrFeO3−δCO2 splittingCoke utilization |
| spellingShingle | Sang-Hyeok Kim Seolhwa Yun Jung-Hyun Lee Il-Hyun Baek Sung-Chan Nam Jong Tak Jang Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production Journal of CO2 Utilization Coke oven gas reforming Syngas SrFeO3−δ CO2 splitting Coke utilization |
| title | Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production |
| title_full | Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production |
| title_fullStr | Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production |
| title_full_unstemmed | Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production |
| title_short | Coke formation and utilization during coke oven gas reforming–CO2 splitting cycles over spherical SrFeO3 pellets for syngas and CO production |
| title_sort | coke formation and utilization during coke oven gas reforming co2 splitting cycles over spherical srfeo3 pellets for syngas and co production |
| topic | Coke oven gas reforming Syngas SrFeO3−δ CO2 splitting Coke utilization |
| url | http://www.sciencedirect.com/science/article/pii/S2212982025000964 |
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