Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts
The world of energy is on the cusp of profound transformation. Hydrogen or hydrogen-containing fuel mixtures in the form of synthesis gas, as carriers of clean energy, will be in the short term among the most efficient solutions to pressing environmental problems, reducing the amount of greenhouse g...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/19/6078 |
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| author | Galina Xanthopoulou Savvas Varitis Manapkhan Zhumabek Konstantinos Karanasios George Vekinis Svetlana A. Tungatarova Tolkyn S. Baizhumanova |
| author_facet | Galina Xanthopoulou Savvas Varitis Manapkhan Zhumabek Konstantinos Karanasios George Vekinis Svetlana A. Tungatarova Tolkyn S. Baizhumanova |
| author_sort | Galina Xanthopoulou |
| collection | DOAJ |
| description | The world of energy is on the cusp of profound transformation. Hydrogen or hydrogen-containing fuel mixtures in the form of synthesis gas, as carriers of clean energy, will be in the short term among the most efficient solutions to pressing environmental problems, reducing the amount of greenhouse gases as well as pollution of cities and dependence on oil-based fuels. Carbon dioxide conversion of methane is the most promising method for the production of synthesis gas due to the simultaneous consumption of two greenhouse gases and, accordingly, a successful solution to environmental problems. Ni/Mn-based catalysts have been prepared by self-propagating high-temperature synthesis (SHS) for this process. The samples were characterized by X-ray diffraction, scanning electron microscopy, and nitrogen porosimetry. The effects of the catalysts’ composition on activity, selectivity, and product yield were investigated. The influence of the content of Ni, Mn on the behavior of catalysts has been established. Comparison of spinels with different component ratios showed that they have a defective structure. Non-stoichiometric spinels with highly defective catalyst structures were obtained due to very high heating and cooling rates during SHS. They work as active sites, which underlies the high activity of the catalysts. |
| first_indexed | 2024-03-10T07:03:41Z |
| format | Article |
| id | doaj.art-456d584dbd6e4d2f908f155090ea67c4 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:03:41Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-456d584dbd6e4d2f908f155090ea67c42023-11-22T15:58:56ZengMDPI AGEnergies1996-10732021-09-011419607810.3390/en14196078Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS CatalystsGalina Xanthopoulou0Savvas Varitis1Manapkhan Zhumabek2Konstantinos Karanasios3George Vekinis4Svetlana A. Tungatarova5Tolkyn S. Baizhumanova6Institute of Nanoscience and Nanotechnology, NCSR Demokritos, 15310 Athens, GreeceInstitute of Nanoscience and Nanotechnology, NCSR Demokritos, 15310 Athens, GreeceD.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, 142, Kunaev Str., Almaty 050010, KazakhstanInstitute of Nanoscience and Nanotechnology, NCSR Demokritos, 15310 Athens, GreeceInstitute of Nanoscience and Nanotechnology, NCSR Demokritos, 15310 Athens, GreeceD.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, 142, Kunaev Str., Almaty 050010, KazakhstanD.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, 142, Kunaev Str., Almaty 050010, KazakhstanThe world of energy is on the cusp of profound transformation. Hydrogen or hydrogen-containing fuel mixtures in the form of synthesis gas, as carriers of clean energy, will be in the short term among the most efficient solutions to pressing environmental problems, reducing the amount of greenhouse gases as well as pollution of cities and dependence on oil-based fuels. Carbon dioxide conversion of methane is the most promising method for the production of synthesis gas due to the simultaneous consumption of two greenhouse gases and, accordingly, a successful solution to environmental problems. Ni/Mn-based catalysts have been prepared by self-propagating high-temperature synthesis (SHS) for this process. The samples were characterized by X-ray diffraction, scanning electron microscopy, and nitrogen porosimetry. The effects of the catalysts’ composition on activity, selectivity, and product yield were investigated. The influence of the content of Ni, Mn on the behavior of catalysts has been established. Comparison of spinels with different component ratios showed that they have a defective structure. Non-stoichiometric spinels with highly defective catalyst structures were obtained due to very high heating and cooling rates during SHS. They work as active sites, which underlies the high activity of the catalysts.https://www.mdpi.com/1996-1073/14/19/6078biogassynthesis gashydrogenreforming |
| spellingShingle | Galina Xanthopoulou Savvas Varitis Manapkhan Zhumabek Konstantinos Karanasios George Vekinis Svetlana A. Tungatarova Tolkyn S. Baizhumanova Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts Energies biogas synthesis gas hydrogen reforming |
| title | Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts |
| title_full | Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts |
| title_fullStr | Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts |
| title_full_unstemmed | Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts |
| title_short | Direct Reduction in Greenhouse Gases by Continuous Dry (CO<sub>2</sub>) Reforming of Methane over Ni-Containing SHS Catalysts |
| title_sort | direct reduction in greenhouse gases by continuous dry co sub 2 sub reforming of methane over ni containing shs catalysts |
| topic | biogas synthesis gas hydrogen reforming |
| url | https://www.mdpi.com/1996-1073/14/19/6078 |
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