Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction
A unique method to prepare Zn-P co-modified hierarchical ZSM-5 zeolites was developed. The ZSM-5 zeolite was directly synthesized by a dry gel conversion without adding any templates or seeds. Afterwards, the hierarchical structure was endowed to the ZSM-5 zeolite by the sequential desilication-deal...
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MDPI AG
2021-11-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/11/1388 |
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| author | Youhe Wang Zhihong Li Chang Dai Ningning Du Tingting Li Risheng Wang Peng Peng Hongman Sun |
| author_facet | Youhe Wang Zhihong Li Chang Dai Ningning Du Tingting Li Risheng Wang Peng Peng Hongman Sun |
| author_sort | Youhe Wang |
| collection | DOAJ |
| description | A unique method to prepare Zn-P co-modified hierarchical ZSM-5 zeolites was developed. The ZSM-5 zeolite was directly synthesized by a dry gel conversion without adding any templates or seeds. Afterwards, the hierarchical structure was endowed to the ZSM-5 zeolite by the sequential desilication-dealumination. Zn and P species were then introduced into the hierarchical ZSM-5 zeolites by the impregnation method and their activity in methanol to aromatics process was investigated. It was found that the Zn-P co-modified hierarchical ZSM-5 zeolites possessed more Zn-related Lewis acid sites, and the ratio of Zn(OH)<sup>+</sup>/ZnO was increased. The catalytic evaluation results revealed that the benzene, toluene and xylene (BTX) and aromatics selectivity were significantly improved from 20.59% and 29.41% of pristine ZSM-5 zeolite to 28.12% and 41.88% of Zn-P co-modified hierarchical counterpart (1.5Zn0.3P/HZSM-5), respectively. Owing to the introduced highly stable Zn-P co-modified hierarchical structures, the lifetime (conversion not less than 99%) of ZSM-5 zeolite during methanol to aromatics reaction was increased from 6 h to 18 h. |
| first_indexed | 2024-03-10T05:37:14Z |
| format | Article |
| id | doaj.art-46ba08e04bf5452381c0beb107dcd42d |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T05:37:14Z |
| publishDate | 2021-11-01 |
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| series | Catalysts |
| spelling | doaj.art-46ba08e04bf5452381c0beb107dcd42d2023-11-22T22:46:30ZengMDPI AGCatalysts2073-43442021-11-011111138810.3390/catal11111388Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics ReactionYouhe Wang0Zhihong Li1Chang Dai2Ningning Du3Tingting Li4Risheng Wang5Peng Peng6Hongman Sun7College of Science, China University of Petroleum, Qingdao 266580, ChinaCollege of Science, China University of Petroleum, Qingdao 266580, ChinaCollege of Chemical Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Chemical Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Chemical Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Science, China University of Petroleum, Qingdao 266580, ChinaCollege of Chemical Engineering, China University of Petroleum, Qingdao 266580, ChinaCollege of Science, China University of Petroleum, Qingdao 266580, ChinaA unique method to prepare Zn-P co-modified hierarchical ZSM-5 zeolites was developed. The ZSM-5 zeolite was directly synthesized by a dry gel conversion without adding any templates or seeds. Afterwards, the hierarchical structure was endowed to the ZSM-5 zeolite by the sequential desilication-dealumination. Zn and P species were then introduced into the hierarchical ZSM-5 zeolites by the impregnation method and their activity in methanol to aromatics process was investigated. It was found that the Zn-P co-modified hierarchical ZSM-5 zeolites possessed more Zn-related Lewis acid sites, and the ratio of Zn(OH)<sup>+</sup>/ZnO was increased. The catalytic evaluation results revealed that the benzene, toluene and xylene (BTX) and aromatics selectivity were significantly improved from 20.59% and 29.41% of pristine ZSM-5 zeolite to 28.12% and 41.88% of Zn-P co-modified hierarchical counterpart (1.5Zn0.3P/HZSM-5), respectively. Owing to the introduced highly stable Zn-P co-modified hierarchical structures, the lifetime (conversion not less than 99%) of ZSM-5 zeolite during methanol to aromatics reaction was increased from 6 h to 18 h.https://www.mdpi.com/2073-4344/11/11/1388methanol to aromaticshierarchical ZSM-5dry gel conversionZn-P co-modified |
| spellingShingle | Youhe Wang Zhihong Li Chang Dai Ningning Du Tingting Li Risheng Wang Peng Peng Hongman Sun Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction Catalysts methanol to aromatics hierarchical ZSM-5 dry gel conversion Zn-P co-modified |
| title | Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction |
| title_full | Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction |
| title_fullStr | Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction |
| title_full_unstemmed | Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction |
| title_short | Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction |
| title_sort | zn p co modified hierarchical zsm 5 zeolites directly synthesized via dry gel conversion for enhanced methanol to aromatics reaction |
| topic | methanol to aromatics hierarchical ZSM-5 dry gel conversion Zn-P co-modified |
| url | https://www.mdpi.com/2073-4344/11/11/1388 |
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