碳化钼催化剂的制备及二苯并噻吩加氢脱硫性能

Preparation of Molybdenum Carbide Catalyst and Its Hydrodesulf Urization Performance for Dibenzothiophene

以MoO_3为前躯体,正已烷/H_2混合物为还原碳化气,采用程序升温碳化反应方法,在不同碳化温度和不同碳源进料速率的条件下碳化制备出碳化钼催化剂,并用XRD进行表征,同时研究了制备出来的碳化物催化剂对二苯并噻吩的加氢脱硫活性.结果表明:程序升温碳化反应到650℃,采用正已烷为碳化原料是可行的,且在适当的正已烷和H_2物质的量比的条件下能够制备出高度分散并且对二苯并噻吩具有较高加氢脱硫活性的负载型碳化钼催化剂.

Molybdenum carbide catalyst was prepared by temperature-programmed reaction by 1.1sing n-hexane/H2 gas mixture to carburize molybdenum trioxide at different carburizing temperatures and different rates of carbon feed. then characterized by X-ray, and studied dibenzothiophene HDS activity of carbide catalyst at the same time. The results indicated that： under carburized by temperature-programmed reaction to 650 ℃, using the n-hexane for the carbonation of raw materials is feasible and can produce a supported molybdenum carbide catalyst with highly fragmented and highly dibenzothiophene HDS activity in appropriate quality proportion of the n-hexane and H2.