Preparation for Pt-Loaded Zeolite Catalysts Using w/o Microemulsion and Their Hydrocracking Behaviors on Fischer-Tropsch Product

Catalysts

Toshiaki Hanaoka¹  Tomohisa Miyazawa²  Katsuya Shimura²  Satoshi Hirata²  Magali Boutonnet² 

[1]Biomass Refinery Research Center, National Institute of Advanced Industrial Science and Technology

[2] Kagamiyama 3-11-32, Higashihiroshima, Hiroshima 739-0046, Japan

关键词: microemulsion;    Pt;    zeolite;    hydrocracking;    jet fuel;   

DOI  :  10.3390/catal5010088

来源: mdpi

【 摘 要 】

Pt-loaded β-type zeolite catalysts with constant Pt content (0.11 wt.%) and similar pore structure were prepared using a water-in-oil (w/o) microemulsion. The effect of Pt particle synthesis conditions using microemulsion (a type of Pt complex-forming agents and the molar ratio of complex-forming agent to Pt⁴⁺) on loaded Pt particle size was investigated. The Pt particle size of the Pt catalyst using tetraethylammonium chloride (TEAC) as a complex-forming agent with the molar TEAC/Pt ratio 10 was the minimum value (3.8 nm), and was much smaller than that (6.7 nm) prepared by the impregnation method. The utilization of the complex-forming agent of which hydrophobic groups occupied a small volume and the appropriate complex-forming agent/Pt ratio were favorable for synthesis of small Pt particles. The effect of loaded Pt particle size on the hydrocracking of the Fischer-Tropsch (FT) product was investigated using the Pt-loaded zeolite catalysts at 250 °C with an initial H₂ pressure of 0.5 MPa, and reaction time of 1 h. The Pt catalyst with a Pt particle size of 4.2 nm prepared using the microemulsion exhibited the maximum corresponding jet fuel yield (30.0%), which was higher than that of the impregnated catalyst.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.