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Yazdanpanah M, Fereidooni M, Márquez V, Paz CV, Saelee T, Salazar Villanueva M, Rittiruam M, Khajondetchairit P, Praserthdam S, Praserthdam P. The Underlying Catalytic Role of Oxygen Vacancies in Fatty Acid Methyl Esters Ketonization over TiO x Catalysts. CHEMSUSCHEM 2024; 17:e202301033. [PMID: 37724580 DOI: 10.1002/cssc.202301033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/18/2023] [Accepted: 09/18/2023] [Indexed: 09/21/2023]
Abstract
Recently, interest in converting bio-derived fatty acid methyl esters (FAMEs) into added-value products has significantly increased. The selectivity of ketonization reaction in the conversion of the FAMEs has significantly hampered the efficiency of this process. Herein, this work reports the preparation of catalysts with different levels of oxygen vacancies while the crystal phase remained unchanged. The catalyst with the highest level of oxygen vacancy exhibited the maximum selectivity. The density functional theory (DFT) simulation showed an increase in interatomic distances leading to the formation of frustrated Lewis pairs (FLPs) upon the creation of oxygen vacancies. The surface measurements, type and density of acid sites of the catalysts, showed that the Lewis acid sites enhanced the selectivity for ketone production; while Bronsted acid sites increased the formation of by-products. Moreover, the ketone formation rate was directly proportional to acid density. The findings of this research provide a different approach for catalyst design, based on defects engineering and their effect on the surface activity, which could be used for enhancing the catalytic performance of novel metal oxides.
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Affiliation(s)
- Mohammad Yazdanpanah
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mohammad Fereidooni
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Victor Márquez
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - C V Paz
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Tinnakorn Saelee
- High-Performance Computing Unit (CECC-HCU), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Martin Salazar Villanueva
- Facultad de Ingeniería, Benemerita Universidad Autonoma de Puebla, Apartado Postal J-39, CP, 72570, Puebla, Mexico
| | - Meena Rittiruam
- High-Performance Computing Unit (CECC-HCU), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Patcharaporn Khajondetchairit
- High-Performance Computing Unit (CECC-HCU), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Supareak Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- High-Performance Computing Unit (CECC-HCU), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Piyasan Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
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Yun J, Tong Z, Hu X, Zhao C, Liu C, Chen D, Zhang H, Chen Z. Modification of CrCeO x with Mo: improved SO 2 resistance and N 2 selectivity for NH 3-SCR at medium–low temperatures. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00679k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mo doping effectively changed the reaction mechanism and surface acidity of CrCeOx catalysts from E–R to L–H, enhancing the sulfur resistance and N2 selectivity.
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Affiliation(s)
- Junge Yun
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
| | - Zhangfa Tong
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xiaomei Hu
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
| | - Cheng Zhao
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
| | - Chengxian Liu
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Dingsheng Chen
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
| | - Hanbing Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Zhihang Chen
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Air Pollution Control Engineering Laboratory of Guangdong Province, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China
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