Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst
Cu/ZnO catalysts were synthesized via an impregnation method on an Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> support and modified by the addition of manganese and niobium as promoters. The effect of the selected promoters on the physicochemical properties and pe...
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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/2073-4344/12/6/636 |
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| author | Nur Insyirah Zulkifli Noor Asmawati Mohd Zabidi Zulkifli Merican Aljunid Merican Sara Faiz Hanna Tasfy |
| author_facet | Nur Insyirah Zulkifli Noor Asmawati Mohd Zabidi Zulkifli Merican Aljunid Merican Sara Faiz Hanna Tasfy |
| author_sort | Nur Insyirah Zulkifli |
| collection | DOAJ |
| description | Cu/ZnO catalysts were synthesized via an impregnation method on an Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> support and modified by the addition of manganese and niobium as promoters. The effect of the selected promoters on the physicochemical properties and performance toward the hydrogenation of CO<sub>2</sub> to methanol are presented in this paper. The Mn and Nb promoters improved the reducibility of the catalyst as evidenced by the shifting of the H<sub>2</sub>-TPR peaks from 315 °C for the un-promoted catalyst to 284 °C for the Mn- and Nb-promoted catalyst. The catalytic performance in a CO<sub>2</sub> hydrogenation reaction was evaluated in a fixed-bed reactor system at 22.5 bar and 250 °C for 5 h. Amongst the catalysts investigated, the catalyst with equal ratio of Mn and Nb promoters exhibited the smallest particle size of 6.7 nm and highest amount of medium-strength basic sites (87 µmol/g), which resulted in the highest CO<sub>2</sub> conversion (15.9%) and methanol selectivity (68.8%). |
| first_indexed | 2024-03-10T00:11:13Z |
| format | Article |
| id | doaj.art-7e1420b90a5c4471bce725dbcfee260d |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T00:11:13Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-7e1420b90a5c4471bce725dbcfee260d2023-11-23T15:59:45ZengMDPI AGCatalysts2073-43442022-06-0112663610.3390/catal12060636Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> CatalystNur Insyirah Zulkifli0Noor Asmawati Mohd Zabidi1Zulkifli Merican Aljunid Merican2Sara Faiz Hanna Tasfy3Center of Contaminant Control and Utilization (CenCoU), Institute of Contaminant Management for Oil and Gas, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaCenter of Contaminant Control and Utilization (CenCoU), Institute of Contaminant Management for Oil and Gas, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaCenter of Contaminant Control and Utilization (CenCoU), Institute of Contaminant Management for Oil and Gas, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaDepartment of Chemical and Petroleum Engineering, American University of Ras Al Khaimah, Ras Al Khaimah 10021, United Arab EmiratesCu/ZnO catalysts were synthesized via an impregnation method on an Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> support and modified by the addition of manganese and niobium as promoters. The effect of the selected promoters on the physicochemical properties and performance toward the hydrogenation of CO<sub>2</sub> to methanol are presented in this paper. The Mn and Nb promoters improved the reducibility of the catalyst as evidenced by the shifting of the H<sub>2</sub>-TPR peaks from 315 °C for the un-promoted catalyst to 284 °C for the Mn- and Nb-promoted catalyst. The catalytic performance in a CO<sub>2</sub> hydrogenation reaction was evaluated in a fixed-bed reactor system at 22.5 bar and 250 °C for 5 h. Amongst the catalysts investigated, the catalyst with equal ratio of Mn and Nb promoters exhibited the smallest particle size of 6.7 nm and highest amount of medium-strength basic sites (87 µmol/g), which resulted in the highest CO<sub>2</sub> conversion (15.9%) and methanol selectivity (68.8%).https://www.mdpi.com/2073-4344/12/6/636CO<sub>2</sub> hydrogenationmethanol synthesismanganeseniobiumCu-based catalyst |
| spellingShingle | Nur Insyirah Zulkifli Noor Asmawati Mohd Zabidi Zulkifli Merican Aljunid Merican Sara Faiz Hanna Tasfy Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst Catalysts CO<sub>2</sub> hydrogenation methanol synthesis manganese niobium Cu-based catalyst |
| title | Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst |
| title_full | Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst |
| title_fullStr | Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst |
| title_full_unstemmed | Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst |
| title_short | Effects of Promoter’s Composition on the Physicochemical Properties of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Catalyst |
| title_sort | effects of promoter s composition on the physicochemical properties of cu zno al sub 2 sub o sub 3 sub zro sub 2 sub catalyst |
| topic | CO<sub>2</sub> hydrogenation methanol synthesis manganese niobium Cu-based catalyst |
| url | https://www.mdpi.com/2073-4344/12/6/636 |
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