Co-based MOR/ZSM-5 composite zeolites over a solvent-free synthesis strategy for improving gasoline selectivity

• Published in: Fuel (Guildford) Vol. 223; pp. 354 - 359
• Main Authors: Cheng, Shilin, Mazonde, Brighton, Zhang, Guihua, Javed, Mudassar, Dai, Peiyao, Cao, Yingnan, Tu, Sisi, Wu, Jiayi, Lu, Chengxue, Xing, Chuang, Shan, Shengdao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-07-2018; Elsevier BV
• Subjects: Catalysts; Catalytic converters; Chemical synthesis; Composite zeolite; Crystal structure; Crystallization; Fischer-Tropsch process; Fischer-Tropsch synthesis; Gasoline; Hydrocarbons; Liquefaction; Morphology; Particulate composites; Selectivity; Solvent-free synthesis; Solvents; Synthesis gas; Zeolites; Composite zeolite; Fischer-Tropsch synthesis; Solvent-free synthesis; Gasoline
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2018.03.042

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•Co@MOR/ZSM-5 zeolites was fabricated under a solvent-free synthesis method.•Crystallization time was directly proportional with crystal morphology.•High gasoline selectivity obtained from MOR/ZSM-5 composite crystals.•Na-type zeolite decrease acidity, leading to a low isoparaffin selectivity.
Composite zeolites containing ZSM-5 are known to be very active for catalytic conversion of syngas into gasoline range hydrocarbons under Fischer-Tropsch synthesis. In this work, a novel MOR/ZSM-5 composite zeolite with immersed Co particles was successfully fabricated under a facile solvent-free synthesis method. The final catalysts were characterised by XRD, SEM and TEM procedures to evaluate the structural properties and morphologies of Co@MOR/ZSM-5. Variation in the crystallization time played a vital role during zeolite synthesis. Perfect crystal structure for solvent-free Co@MOR/ZSM-5 was found at 72 h of crystallization time and proved to exhibit the greatest gasoline selectivity of 72.3%. This composite zeolite synthesized by solvent-free method with outstanding performance, has all potential to act as highly effective heterogeneous catalyst in the near future.