Dimethyl Ether Oxidation over Copper Ferrite Catalysts
The depletion of fossil energy sources and the legislation regarding emission control demand the use of alternative fuels and rapid progression of aftertreatment technologies. The study of dimethyl ether (DME) catalytic oxidation is important in this respect, as DME is a promising clean fuel and at...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/6/604 |
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| author | Maria Smyrnioti Theophilos Ioannides |
| author_facet | Maria Smyrnioti Theophilos Ioannides |
| author_sort | Maria Smyrnioti |
| collection | DOAJ |
| description | The depletion of fossil energy sources and the legislation regarding emission control demand the use of alternative fuels and rapid progression of aftertreatment technologies. The study of dimethyl ether (DME) catalytic oxidation is important in this respect, as DME is a promising clean fuel and at the same time a VOC pollutant present in the tail gases of industrial processes. In the present work, copper ferrite catalysts synthesized via the citrate complexation method have been evaluated in DME oxidation. N<sub>2</sub>-physisorption, XRD, H<sub>2</sub>-TPR, and XPS were employed for the characterization of the mixed oxide catalysts. The copper ferrite spinel phase was detected in all samples accompanied by a gradual decrease in the bulk CuO phase upon increase in iron content, with the latter never vanishing completely. The Fe<sub>0.67</sub>Cu<sub>0.33</sub> catalyst exhibited the highest catalytic activity in DME oxidation, attaining approximately a 4-fold higher oxidation rate compared to the respective pure copper and iron oxides. The enhanced catalytic performance was attributed to the higher specific surface area of the catalyst and its enhanced redox properties. Highly dispersed copper species were developed owing to the formation of the spinel phase. DME-TPD/TPSR experiments showed that the surface lattice oxygen of the Fe<sub>0.67</sub>Cu<sub>0.33</sub> catalyst can oxidize preadsorbed DME at a lower temperature than all other catalysts which is in agreement with the H<sub>2</sub>-TPR findings. |
| first_indexed | 2024-03-10T00:11:19Z |
| format | Article |
| id | doaj.art-977463bddad64e7399173fef4349949c |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T00:11:19Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-977463bddad64e7399173fef4349949c2023-11-23T15:59:11ZengMDPI AGCatalysts2073-43442022-06-0112660410.3390/catal12060604Dimethyl Ether Oxidation over Copper Ferrite CatalystsMaria Smyrnioti0Theophilos Ioannides1Foundation for Research & Technology-Hellas, Institute of Chemical Engineering Sciences (FORTH/ICE-HT), GR-26504 Patras, GreeceFoundation for Research & Technology-Hellas, Institute of Chemical Engineering Sciences (FORTH/ICE-HT), GR-26504 Patras, GreeceThe depletion of fossil energy sources and the legislation regarding emission control demand the use of alternative fuels and rapid progression of aftertreatment technologies. The study of dimethyl ether (DME) catalytic oxidation is important in this respect, as DME is a promising clean fuel and at the same time a VOC pollutant present in the tail gases of industrial processes. In the present work, copper ferrite catalysts synthesized via the citrate complexation method have been evaluated in DME oxidation. N<sub>2</sub>-physisorption, XRD, H<sub>2</sub>-TPR, and XPS were employed for the characterization of the mixed oxide catalysts. The copper ferrite spinel phase was detected in all samples accompanied by a gradual decrease in the bulk CuO phase upon increase in iron content, with the latter never vanishing completely. The Fe<sub>0.67</sub>Cu<sub>0.33</sub> catalyst exhibited the highest catalytic activity in DME oxidation, attaining approximately a 4-fold higher oxidation rate compared to the respective pure copper and iron oxides. The enhanced catalytic performance was attributed to the higher specific surface area of the catalyst and its enhanced redox properties. Highly dispersed copper species were developed owing to the formation of the spinel phase. DME-TPD/TPSR experiments showed that the surface lattice oxygen of the Fe<sub>0.67</sub>Cu<sub>0.33</sub> catalyst can oxidize preadsorbed DME at a lower temperature than all other catalysts which is in agreement with the H<sub>2</sub>-TPR findings.https://www.mdpi.com/2073-4344/12/6/604dimethyl etheroxidationVOCiron oxidecopper oxidecopper ferrite |
| spellingShingle | Maria Smyrnioti Theophilos Ioannides Dimethyl Ether Oxidation over Copper Ferrite Catalysts Catalysts dimethyl ether oxidation VOC iron oxide copper oxide copper ferrite |
| title | Dimethyl Ether Oxidation over Copper Ferrite Catalysts |
| title_full | Dimethyl Ether Oxidation over Copper Ferrite Catalysts |
| title_fullStr | Dimethyl Ether Oxidation over Copper Ferrite Catalysts |
| title_full_unstemmed | Dimethyl Ether Oxidation over Copper Ferrite Catalysts |
| title_short | Dimethyl Ether Oxidation over Copper Ferrite Catalysts |
| title_sort | dimethyl ether oxidation over copper ferrite catalysts |
| topic | dimethyl ether oxidation VOC iron oxide copper oxide copper ferrite |
| url | https://www.mdpi.com/2073-4344/12/6/604 |
| work_keys_str_mv | AT mariasmyrnioti dimethyletheroxidationovercopperferritecatalysts AT theophilosioannides dimethyletheroxidationovercopperferritecatalysts |