The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation
For the reaction of catalytic dehydrogenation of ethanol to produce acetaldehyde, current catalysts face the challenge of limited selectivity, particularly exhibiting poor performance in the efficient generation of acetaldehyde. Some catalysts are hindered in the dehydrogenation process due to exces...
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Editorial Department of Journal of Petrochemical Universities
2025-08-01
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| Series: | Shiyou huagong gaodeng xuexiao xuebao |
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| Online Access: | https://journal.lnpu.edu.cn/syhg/CN/10.12422/j.issn.1006-396X.2025.04.009 |
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| author | Xinru QU Dechen BO Zhongxing GENG Guoyu BAI Dongmei LIU |
| author_facet | Xinru QU Dechen BO Zhongxing GENG Guoyu BAI Dongmei LIU |
| author_sort | Xinru QU |
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| description | For the reaction of catalytic dehydrogenation of ethanol to produce acetaldehyde, current catalysts face the challenge of limited selectivity, particularly exhibiting poor performance in the efficient generation of acetaldehyde. Some catalysts are hindered in the dehydrogenation process due to excessive acidity, which urgently needs to be addressed. Therefore, the development of novel catalysts with high⁃performance surface basicity is crucial.Two composite catalysts, La2O2CO3/ZnO⁃a and La2O2CO3/ZnO⁃b, were prepared using the co⁃precipitation method and the solution combustion method. The performance of the catalysts was evaluated by varying preparation conditions such as precipitation pH, aging time, calcination temperature, and calcination time to determine the optimal synthesis parameters. Advanced characterization techniques, including Scanning Electron Microscopy, Transmission Electron Microscopy, X⁃ray Diffraction, and CO2 Temperature⁃Programmed Desorption, were employed to thoroughly investigate the catalyst's crystal phase, morphology, surface basicity, and their relationship with catalytic performance. The optimal process conditions for ethanol dehydrogenation to acetaldehyde were investigated on the best⁃performing catalyst. When the precipitation pH was 9.0, the aging time was 12.0 h, the ratio of nLa to nZn was 1.0, and the calcination temperature was 600 ℃, the optimal preparation conditions for the solution calcination method were determined as follows: calcination time of 5.0 h, calcination temperature of 550 ℃, and nLa/nZn of 1.0. Under the conditions of a volume space velocity of 1.0 h⁻¹, a reaction pressure of 1.0 MPa, and a reaction temperature of 190 ℃, La₂O₂CO₃/ZnO⁃a achieved the highest acetaldehyde yield of 57.60%. |
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| institution | Kabale University |
| issn | 1006-396X |
| language | zho |
| publishDate | 2025-08-01 |
| publisher | Editorial Department of Journal of Petrochemical Universities |
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| series | Shiyou huagong gaodeng xuexiao xuebao |
| spelling | doaj-art-bacf83775acf4c45b750f4bbe100e7d72025-08-25T05:46:12ZzhoEditorial Department of Journal of Petrochemical UniversitiesShiyou huagong gaodeng xuexiao xuebao1006-396X2025-08-01384667410.12422/j.issn.1006-396X.2025.04.009The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol DehydrogenationXinru QU0Dechen BO1Zhongxing GENG2Guoyu BAI3Dongmei LIU4School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，ChinaSchool of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，ChinaSchool of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，ChinaSchool of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，ChinaSchool of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，ChinaFor the reaction of catalytic dehydrogenation of ethanol to produce acetaldehyde, current catalysts face the challenge of limited selectivity, particularly exhibiting poor performance in the efficient generation of acetaldehyde. Some catalysts are hindered in the dehydrogenation process due to excessive acidity, which urgently needs to be addressed. Therefore, the development of novel catalysts with high⁃performance surface basicity is crucial.Two composite catalysts, La2O2CO3/ZnO⁃a and La2O2CO3/ZnO⁃b, were prepared using the co⁃precipitation method and the solution combustion method. The performance of the catalysts was evaluated by varying preparation conditions such as precipitation pH, aging time, calcination temperature, and calcination time to determine the optimal synthesis parameters. Advanced characterization techniques, including Scanning Electron Microscopy, Transmission Electron Microscopy, X⁃ray Diffraction, and CO2 Temperature⁃Programmed Desorption, were employed to thoroughly investigate the catalyst's crystal phase, morphology, surface basicity, and their relationship with catalytic performance. The optimal process conditions for ethanol dehydrogenation to acetaldehyde were investigated on the best⁃performing catalyst. When the precipitation pH was 9.0, the aging time was 12.0 h, the ratio of nLa to nZn was 1.0, and the calcination temperature was 600 ℃, the optimal preparation conditions for the solution calcination method were determined as follows: calcination time of 5.0 h, calcination temperature of 550 ℃, and nLa/nZn of 1.0. Under the conditions of a volume space velocity of 1.0 h⁻¹, a reaction pressure of 1.0 MPa, and a reaction temperature of 190 ℃, La₂O₂CO₃/ZnO⁃a achieved the highest acetaldehyde yield of 57.60%.https://journal.lnpu.edu.cn/syhg/CN/10.12422/j.issn.1006-396X.2025.04.009ethanol dehydrogenation to acetaldehydecoprecipitation methodsolution combustion methodla2o2co3/zno |
| spellingShingle | Xinru QU Dechen BO Zhongxing GENG Guoyu BAI Dongmei LIU The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation Shiyou huagong gaodeng xuexiao xuebao ethanol dehydrogenation to acetaldehyde coprecipitation method solution combustion method la2o2co3/zno |
| title | The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation |
| title_full | The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation |
| title_fullStr | The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation |
| title_full_unstemmed | The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation |
| title_short | The Influence of Preparation Methods on the Catalytic Performance of La2O2CO3/ZnO in Ethanol Dehydrogenation |
| title_sort | influence of preparation methods on the catalytic performance of la2o2co3 zno in ethanol dehydrogenation |
| topic | ethanol dehydrogenation to acetaldehyde coprecipitation method solution combustion method la2o2co3/zno |
| url | https://journal.lnpu.edu.cn/syhg/CN/10.12422/j.issn.1006-396X.2025.04.009 |
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