Research On Extrusion Conditions And Macro Performance Of The Fe-ZSM-5 Catalyst For N₂O Oxidation Benzene To Phenol

N2O one step oxidation benzene to phenol as a new way in the process of phenol has been the focus of modern researchers. In this paper, we take the N2O one step oxidation of benzene to phenol as the object, by means of the combination of characterization analysis and experimental evaluation. Study on the effects of molding conditions on the forming process of Fe-ZSM-5 molecular sieve and the macroscopic properties of the catalyst. Determine the suitability of Fe-ZSM-5 molding and application conditions.Regard the strength of catalyst and its activity as the index. The influence of SB powder, nitric acid, water/powder ratio and expanding agent were investigated by single factor method. The results shows:(1)SB powder, nitric acid, water/powder ratio and expanding agent all have a great influence on the strength of molding catalyst. The increase of the content of SB powder will lead to the increase of the strength of the catalyst. The addition of nitric acid and water have the Optimum value. Expanding agent can make the catalyst strength decrease. (2)Adding SB powder, nitric acid has a certain effect on the catalytic activity of the reaction, and the adding of the water almost have no effect on activity. (3)Adding pore expanding agent brings the increasing of activity and life of catalyst. When the addition amount was 10%, the highest yield of phenol reached 77.8%. The suitable molding conditions for Fe-ZSM-5 molecular sieve catalysts are:powder Fe-ZSM- 20g, SB powder 20%-25%, HNO3 6%-8% and water powder ratio 70%.Regard the yield of phenol and the conversion rate of N2O as the target. Adopt the way of combining with single factor experiment and orthogonal experiment. Explore the effects of reaction temperature, Space velocity and the ratio of raw materials on the reaction. the results shows:(1)The selection of reaction temperature will seriously affect the reaction, the temperature is too high or too low to affect the catalytic activity and life. (2) Space velocity changes will bring serious influence on the catalyst bed temperature in the reaction process, but also affect the catalytic activity. (3)With the increasing of the raw material ratio, the yield of phenol increased first and then decreased. finally determine the relatively suitable for the range of operating conditions of the catalysts used in the experiment:reaction temperature 425-450?, space velocity 4500h-1-5500h-1, ratio of raw materials 8:1-10:1.