A New Catalyst for the Non-hydrogenation Reduction of Olefins

In this article, the preparation and application of a nonhydrogenation-reducing olefin catalyst were studied. The carrier of this catalyst was synthesized by γ-Al₂O₃ and SiO₂. It was found that the optimum molar ratio was 1:1 and the more suitable synthetic temperature was 80°C. The catalyst consisted of transition element Ni, W loading on the carrier that was self-made. Meanwhile, the properties of the catalyst were determined by an x-ray diffraction pattern (XRD), N₂-adsorption, and an FT-IR spectrophotometer. In order to study the performance of the catalyst, it was dried and calcined, and then it was reacted with the feed gasoline on the small fixed vector. The results showed that the content of olefins in fluid catalytic cracking (FCC) gasoline had been reduced from 51.0% to 25.6% when the reaction temperature was 170°C, the space velocity was 1.5 h^-1, and the reaction pressure was 2.5 MPa. The experimental results showed that the method of the catalytic preparation was simple and convenient, the activity of the catalyst was very high, and the regeneration and stability were also very good. The olefin content was reduced by more than 20% in FCC gasoline; the original octane number was not changed. Therefore the quality of the gasoline would meet the new gasoline standard (GB). The catalyst had very high industrial application value.