Nb2O5 promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone

doi:10.1016/j.cjche.2021.04.038

Chinese Journal of Chemical Engineering ›› 2022, Vol. 44 ›› Issue (4): 87-93.DOI: 10.1016/j.cjche.2021.04.038

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Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone

Chunhua Zhang^1,2, Zhengyan Qu¹, Hong Jiang¹, Rizhi Chen¹, Weihong Xing¹

1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Changzhou Key Laboratory of Eco-Textile Technology, Changzhou Vocational Institute of Textile and Garment, Changzhou 213164, China

Received:2021-02-01 Revised:2021-04-11 Online:2022-06-18 Published:2022-04-28
Contact: Rizhi Chen,E-mail:rizhichen@njtech.edu.cn;Weihong Xing,E-mail:xingwh@njtech.edu.cn
Supported by:
The financial supports from the National Natural Science Foundation (21776127, 21921006), the Jiangsu Province Key R&D Program (BE2018009-2), the Jiangsu Province natural science research of College and university general project (20KJB540003), a project funded by the priority academic program development of Jiangsu higher education institutions (PAPD), the State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201902), and the outstanding young teacher's project of Changzhou Vocational Institute of Textile and Garment of China are gratefully acknowledged.

Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone

Chunhua Zhang^1,2, Zhengyan Qu¹, Hong Jiang¹, Rizhi Chen¹, Weihong Xing¹

1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Changzhou Key Laboratory of Eco-Textile Technology, Changzhou Vocational Institute of Textile and Garment, Changzhou 213164, China

通讯作者: Rizhi Chen,E-mail:rizhichen@njtech.edu.cn;Weihong Xing,E-mail:xingwh@njtech.edu.cn
基金资助:
The financial supports from the National Natural Science Foundation (21776127, 21921006), the Jiangsu Province Key R&D Program (BE2018009-2), the Jiangsu Province natural science research of College and university general project (20KJB540003), a project funded by the priority academic program development of Jiangsu higher education institutions (PAPD), the State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201902), and the outstanding young teacher's project of Changzhou Vocational Institute of Textile and Garment of China are gratefully acknowledged.

Abstract

Abstract: Phenol hydrogenation is a green route to prepare cyclohexanone, an intermediate for the production of nylon 66 and nylon 6. The development of high-performance catalysts still keeps a great challenge. Herein, the activated carbon (AC) was modified with an acidic material Nb₂O₅ to adjust the microstructure and surface properties of AC, and the influences of the calcination temperature and Nb₂O₅ content on the catalytic performance of the Pd/AC-Nb₂O₅ catalysts for the phenol hydrogenation to cyclohexanone were investigated. The Nb₂O₅ with proper content can be highly uniformly distributed on the AC surface, enhancing the acidity of the Pd/AC-Nb₂O₅ catalysts with comparable specific surface area and Pd dispersion, thereby improving the catalytic activity. The hybrid Pd/AC-10Nb₂O₅-500 catalyst exhibits the synergistic effect between the Pd nanoparticles and AC-10Nb₂O₅, which enhances the catalytic activity for the hydrogenation of phenol. Furthermore, the as-prepared Pd/AC-10Nb₂O₅-500 catalyst shows good reusability during 7 reaction cycles.

Key words: Phenol hydrogenation, Cyclohexanone, Nb₂O₅, Pd/AC, Acidity

摘要： Phenol hydrogenation is a green route to prepare cyclohexanone, an intermediate for the production of nylon 66 and nylon 6. The development of high-performance catalysts still keeps a great challenge. Herein, the activated carbon (AC) was modified with an acidic material Nb₂O₅ to adjust the microstructure and surface properties of AC, and the influences of the calcination temperature and Nb₂O₅ content on the catalytic performance of the Pd/AC-Nb₂O₅ catalysts for the phenol hydrogenation to cyclohexanone were investigated. The Nb₂O₅ with proper content can be highly uniformly distributed on the AC surface, enhancing the acidity of the Pd/AC-Nb₂O₅ catalysts with comparable specific surface area and Pd dispersion, thereby improving the catalytic activity. The hybrid Pd/AC-10Nb₂O₅-500 catalyst exhibits the synergistic effect between the Pd nanoparticles and AC-10Nb₂O₅, which enhances the catalytic activity for the hydrogenation of phenol. Furthermore, the as-prepared Pd/AC-10Nb₂O₅-500 catalyst shows good reusability during 7 reaction cycles.

关键词: Phenol hydrogenation, Cyclohexanone, Nb₂O₅, Pd/AC, Acidity

Chunhua Zhang, Zhengyan Qu, Hong Jiang, Rizhi Chen, Weihong Xing. Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone[J]. Chinese Journal of Chemical Engineering, 2022, 44(4): 87-93.

Chunhua Zhang, Zhengyan Qu, Hong Jiang, Rizhi Chen, Weihong Xing. Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone[J]. 中国化学工程学报, 2022, 44(4): 87-93.

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Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone

Nb₂O₅ promoted Pd/AC catalyst for selective phenol hydrogenation to cyclohexanone

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