3D-printed zeolite with combined structure for xylene isomerization
Para-xylene (PX) is an important material for the production of polyester fibers and resins; it is widely used in fuel and medical fields. To alleviate the low strength and unsatisfactory mass-transfer performance of conventional catalysts during xylene isomerization, a combined-structure catalyst i...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522003665 |
| _version_ | 1811334599394983936 |
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| author | Yifan Yang Zhenhuan Zhou Xuyang Chu Xiaojin Tang Mo Zhou Wei Zhou Ting Fu |
| author_facet | Yifan Yang Zhenhuan Zhou Xuyang Chu Xiaojin Tang Mo Zhou Wei Zhou Ting Fu |
| author_sort | Yifan Yang |
| collection | DOAJ |
| description | Para-xylene (PX) is an important material for the production of polyester fibers and resins; it is widely used in fuel and medical fields. To alleviate the low strength and unsatisfactory mass-transfer performance of conventional catalysts during xylene isomerization, a combined-structure catalyst is fabricated using three-dimensional (3D) printing technology. In this study, a catalyst ink formulation and preparation method suitable for 3D printing is designed, and a wet ball-milling process is adopted to improve the stability of the ink during 3D printing. The mass-transfer performance of the structured catalysts are investigated via computational fluid dynamics simulation; thus, combined-structure catalysts with high diffusivity and high specific surface area are realized. Compressive strength tests and xylene isomerization reaction experiments are conducted on the three-dimensionally printed catalysts and extrudates. Compared with the extrudates, the three-dimensionally printed catalyst exhibits higher mechanical strength and better catalytic performance. Among the structured catalysts, the combined linear-staggered/wave-vertical (LS/WV) catalyst demonstrates the best overall performance with a PX concentration in xylene of 22.89% and a high ethylbenzene conversion of 36.70%, which is approximately 21.68% higher than the extrudates. |
| first_indexed | 2024-04-13T17:11:20Z |
| format | Article |
| id | doaj.art-eba4a9bf50d54f61b46b09eb561a6f49 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T17:11:20Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-eba4a9bf50d54f61b46b09eb561a6f492022-12-22T02:38:17ZengElsevierMaterials & Design0264-12752022-07-012191107443D-printed zeolite with combined structure for xylene isomerizationYifan Yang0Zhenhuan Zhou1Xuyang Chu2Xiaojin Tang3Mo Zhou4Wei Zhou5Ting Fu6Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, ChinaSINOPEC Research Institute of Petroleum Processing, Beijing 100083, ChinaDepartment of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China; Corresponding authors.SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China; Corresponding authors.SINOPEC Research Institute of Petroleum Processing, Beijing 100083, ChinaDepartment of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, ChinaDepartment of Machanical & Automation, Wuhan University of Science and Technology, Wuhan 430081, China; Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaPara-xylene (PX) is an important material for the production of polyester fibers and resins; it is widely used in fuel and medical fields. To alleviate the low strength and unsatisfactory mass-transfer performance of conventional catalysts during xylene isomerization, a combined-structure catalyst is fabricated using three-dimensional (3D) printing technology. In this study, a catalyst ink formulation and preparation method suitable for 3D printing is designed, and a wet ball-milling process is adopted to improve the stability of the ink during 3D printing. The mass-transfer performance of the structured catalysts are investigated via computational fluid dynamics simulation; thus, combined-structure catalysts with high diffusivity and high specific surface area are realized. Compressive strength tests and xylene isomerization reaction experiments are conducted on the three-dimensionally printed catalysts and extrudates. Compared with the extrudates, the three-dimensionally printed catalyst exhibits higher mechanical strength and better catalytic performance. Among the structured catalysts, the combined linear-staggered/wave-vertical (LS/WV) catalyst demonstrates the best overall performance with a PX concentration in xylene of 22.89% and a high ethylbenzene conversion of 36.70%, which is approximately 21.68% higher than the extrudates.http://www.sciencedirect.com/science/article/pii/S02641275220036653D printingStructured catalystMass transferMechanical strength |
| spellingShingle | Yifan Yang Zhenhuan Zhou Xuyang Chu Xiaojin Tang Mo Zhou Wei Zhou Ting Fu 3D-printed zeolite with combined structure for xylene isomerization Materials & Design 3D printing Structured catalyst Mass transfer Mechanical strength |
| title | 3D-printed zeolite with combined structure for xylene isomerization |
| title_full | 3D-printed zeolite with combined structure for xylene isomerization |
| title_fullStr | 3D-printed zeolite with combined structure for xylene isomerization |
| title_full_unstemmed | 3D-printed zeolite with combined structure for xylene isomerization |
| title_short | 3D-printed zeolite with combined structure for xylene isomerization |
| title_sort | 3d printed zeolite with combined structure for xylene isomerization |
| topic | 3D printing Structured catalyst Mass transfer Mechanical strength |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522003665 |
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