Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane
Oxidative Coupling of Methane (OCM) is a process to produce ethylene as one of the most widely used petrochemicals from methane natural gas. The core–shell nano-catalyst of NaKCO3@(Mn-Na2WO4/SiO2) was prepared with different ratios of Na/K, and its activity in the OCM process was investigated and it...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Arabian Journal of Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S187853522300059X |
| _version_ | 1811159961773801472 |
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| author | Hadis Rezaee Mir Esmaeil Masoumi Afshar Alihosseini |
| author_facet | Hadis Rezaee Mir Esmaeil Masoumi Afshar Alihosseini |
| author_sort | Hadis Rezaee |
| collection | DOAJ |
| description | Oxidative Coupling of Methane (OCM) is a process to produce ethylene as one of the most widely used petrochemicals from methane natural gas. The core–shell nano-catalyst of NaKCO3@(Mn-Na2WO4/SiO2) was prepared with different ratios of Na/K, and its activity in the OCM process was investigated and its performance was compared with the conventional Mn-Na2WO4/SiO2 nano-catalyst. The effect of temperature and methane-to-oxygen ratio on nano-catalyst performance was investigated. The performance criteria included methane conversion, ethylene selectivity, and C2+ yield. The formation of the core–shell structure has been deliberated using XRD and FE-SEM characterization tests. The results of characterization and reactor experiments indicated that the best performance was related to the nano-catalyst prepared with a ratio ofNa/K = 2/2.4, operating conditions: 850 °C, atmospheric pressure, and CH4/O2 ratio = 2 in the reaction feed. The formation of the core–shell structure does not reduce the nano-catalyst activity, but rather increases the selectivity of the main product, ethylene, by improving the nano-catalyst performance even at 850 °C. Stability tests were performed to examine the catalytic activity under high temperatures. |
| first_indexed | 2024-04-10T05:49:35Z |
| format | Article |
| id | doaj.art-4a13302c90c542d19d58e89ac3803c02 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-10T05:49:35Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-4a13302c90c542d19d58e89ac3803c022023-03-05T04:23:57ZengElsevierArabian Journal of Chemistry1878-53522023-04-01164104598Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methaneHadis Rezaee0Mir Esmaeil Masoumi1Afshar Alihosseini2Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, Tehran, IranDepartment of Chemical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran; Corresponding author.Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, IranOxidative Coupling of Methane (OCM) is a process to produce ethylene as one of the most widely used petrochemicals from methane natural gas. The core–shell nano-catalyst of NaKCO3@(Mn-Na2WO4/SiO2) was prepared with different ratios of Na/K, and its activity in the OCM process was investigated and its performance was compared with the conventional Mn-Na2WO4/SiO2 nano-catalyst. The effect of temperature and methane-to-oxygen ratio on nano-catalyst performance was investigated. The performance criteria included methane conversion, ethylene selectivity, and C2+ yield. The formation of the core–shell structure has been deliberated using XRD and FE-SEM characterization tests. The results of characterization and reactor experiments indicated that the best performance was related to the nano-catalyst prepared with a ratio ofNa/K = 2/2.4, operating conditions: 850 °C, atmospheric pressure, and CH4/O2 ratio = 2 in the reaction feed. The formation of the core–shell structure does not reduce the nano-catalyst activity, but rather increases the selectivity of the main product, ethylene, by improving the nano-catalyst performance even at 850 °C. Stability tests were performed to examine the catalytic activity under high temperatures.http://www.sciencedirect.com/science/article/pii/S187853522300059XOxidative Coupling of MethaneEthyleneNano-catalystCore-shellShell |
| spellingShingle | Hadis Rezaee Mir Esmaeil Masoumi Afshar Alihosseini Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane Arabian Journal of Chemistry Oxidative Coupling of Methane Ethylene Nano-catalyst Core-shell Shell |
| title | Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane |
| title_full | Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane |
| title_fullStr | Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane |
| title_full_unstemmed | Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane |
| title_short | Synthesis of NaKCO3@(Mn-Na2 WO4/SiO2) core-shell catalyst for oxidative coupling of methane |
| title_sort | synthesis of nakco3 mn na2 wo4 sio2 core shell catalyst for oxidative coupling of methane |
| topic | Oxidative Coupling of Methane Ethylene Nano-catalyst Core-shell Shell |
| url | http://www.sciencedirect.com/science/article/pii/S187853522300059X |
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