Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether
Mordenite (H-MOR) catalysts were synthesized by a hydrothermal method, and silver-modified mordenite (Ag-MOR) catalysts were prepared by ion exchange with AgNO<sub>3</sub> at different concentrations. The performance of these catalysts in the carbonylation of dimethyl ether (DME) to meth...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/11/2/197 |
| _version_ | 1797415918093991936 |
|---|---|
| author | Qijia Lu Weixin Qian Hongfang Ma Haitao Zhang Weiyong Ying |
| author_facet | Qijia Lu Weixin Qian Hongfang Ma Haitao Zhang Weiyong Ying |
| author_sort | Qijia Lu |
| collection | DOAJ |
| description | Mordenite (H-MOR) catalysts were synthesized by a hydrothermal method, and silver-modified mordenite (Ag-MOR) catalysts were prepared by ion exchange with AgNO<sub>3</sub> at different concentrations. The performance of these catalysts in the carbonylation of dimethyl ether (DME) to methyl acetate (MA) was also evaluated. The catalysts were characterized by Ar adsorption/desorption, XRD, ICP-AES, SEM, HRTEM, <sup>27</sup>Al NMR, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, Py-IR, and CO-TPD. According to the characterization results, Ag ion exchange sites were mainly located in the 8-membered ring (8-MR) channels of Ag-MOR; evenly dispersed Ag<sub>2</sub>O particles were also present. The acid site distribution was changed by the modification of Ag, and the amount of Brønsted acid sites increased in 8-MR and decreased in 12-MR. The CO adsorption performance of the catalyst significantly increased with the modification of Ag. These changes improved the conversion and selectivity of the carbonylation of DME. Over 4Ag-MOR in particular, DME conversion and MA selectivity reached 94% and 100%, respectively. |
| first_indexed | 2024-03-09T05:56:22Z |
| format | Article |
| id | doaj.art-8b10505ae52049cba345a9b53fa12da7 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T05:56:22Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-8b10505ae52049cba345a9b53fa12da72023-12-03T12:13:03ZengMDPI AGCatalysts2073-43442021-02-0111219710.3390/catal11020197Silver-Modified Nano Mordenite for Carbonylation of Dimethyl EtherQijia Lu0Weixin Qian1Hongfang Ma2Haitao Zhang3Weiyong Ying4Engineering Research Center of Large-scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaEngineering Research Center of Large-scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaEngineering Research Center of Large-scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaEngineering Research Center of Large-scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaEngineering Research Center of Large-scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaMordenite (H-MOR) catalysts were synthesized by a hydrothermal method, and silver-modified mordenite (Ag-MOR) catalysts were prepared by ion exchange with AgNO<sub>3</sub> at different concentrations. The performance of these catalysts in the carbonylation of dimethyl ether (DME) to methyl acetate (MA) was also evaluated. The catalysts were characterized by Ar adsorption/desorption, XRD, ICP-AES, SEM, HRTEM, <sup>27</sup>Al NMR, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, Py-IR, and CO-TPD. According to the characterization results, Ag ion exchange sites were mainly located in the 8-membered ring (8-MR) channels of Ag-MOR; evenly dispersed Ag<sub>2</sub>O particles were also present. The acid site distribution was changed by the modification of Ag, and the amount of Brønsted acid sites increased in 8-MR and decreased in 12-MR. The CO adsorption performance of the catalyst significantly increased with the modification of Ag. These changes improved the conversion and selectivity of the carbonylation of DME. Over 4Ag-MOR in particular, DME conversion and MA selectivity reached 94% and 100%, respectively.https://www.mdpi.com/2073-4344/11/2/197dimethyl ethercarbonylationsilvermordenitemethyl acetate |
| spellingShingle | Qijia Lu Weixin Qian Hongfang Ma Haitao Zhang Weiyong Ying Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether Catalysts dimethyl ether carbonylation silver mordenite methyl acetate |
| title | Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether |
| title_full | Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether |
| title_fullStr | Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether |
| title_full_unstemmed | Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether |
| title_short | Silver-Modified Nano Mordenite for Carbonylation of Dimethyl Ether |
| title_sort | silver modified nano mordenite for carbonylation of dimethyl ether |
| topic | dimethyl ether carbonylation silver mordenite methyl acetate |
| url | https://www.mdpi.com/2073-4344/11/2/197 |
| work_keys_str_mv | AT qijialu silvermodifiednanomordeniteforcarbonylationofdimethylether AT weixinqian silvermodifiednanomordeniteforcarbonylationofdimethylether AT hongfangma silvermodifiednanomordeniteforcarbonylationofdimethylether AT haitaozhang silvermodifiednanomordeniteforcarbonylationofdimethylether AT weiyongying silvermodifiednanomordeniteforcarbonylationofdimethylether |