A solvent-free in situ synthesis of a hierarchical Co-based zeolite catalyst and its application to tuning Fischer-Tropsch product selectivity

• Published in: Catalysis science & technology Vol. 8; no. 11; pp. 282 - 288
• Main Authors: Mazonde, Brighton, Cheng, Shilin, Zhang, Guihua, Javed, Mudassar, Gao, Weizhe, Zhang, Yu, Tao, Meng, Lu, Chengxue, Xing, Chuang
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 2018
• Subjects: Catalysis; Catalysts; Chemical synthesis; Crystal structure; Crystallization; Fischer-Tropsch process; Gasoline; Hydrothermal crystal growth; Mass transfer; Porosity; Selectivity; Silicon dioxide; Solvents; Structural hierarchy; Zeolites
• ISSN: 2044-4753; 2044-4761
• DOI: 10.1039/c8cy00243f

As a distinctive supportable route, the solvent-free synthesis of zeolites not only minimizes the problems of conversional hydrothermal synthesis, but also greatly increases the product yields with advantageous characteristics, such as reduced waste production and a hierarchical pore structure. Herein, we demonstrate using in situ crystal Co/SiO 2 to form a hierarchical catalyst with Co particles entrapped inside the ZSM-5 body via a solvent-free process. Na-type zeolite catalysts enhanced the production of gasoline-range (C 5 -C 11 ) products, with Co@NaZSM-5 giving a high selectivity of 68% in the Fischer-Tropsch synthesis. Obviously, all characterizations showed that these solvent-free synthesized samples had high crystallization and a high surface area for mass transfer. This hierarchical zeolite has the potential to be applied to other similar materials owing to its convenient synthesis method, features, and outstanding results. As a distinctive supportable route, the solvent-free synthesis of zeolites not only minimizes the problems of conversional hydrothermal synthesis, but also greatly increases the product yields with advantageous characteristics, such as reduced waste production and a hierarchical pore structure.