Studies On The Catalysts For Catalytic Combustion Of Propane And The Infra-red Heater For The Casting Head Gas

During the exploitationof petroleum, the discharging of some light alkanesas the casting head gas is an environmental problem. The catalytic combustion isone of the efficient ways to solve the problem.Although much work has been thoroughly done for catalytic combustion ofCH₄, researches about the casting head gas are seldom reported, due to thecomplex compositions and the existence of H₂S in the casting head gas.We chose propane as model reactant and investigated its catalyticcombustion on Pt catalyst. The BET, TPR, and H₂-chemisorp techniques wereapplied to characterize the performance of the catalyst. It was found that thecatalytic performance can be improved by increasing Pt loading and the porevolume of γ-Al₂O₃ support. The activity of pre-reduced catalyst isn't betterthan non-reduced one. Besides, the Pt-Sn bimetallic catalysts show a goodstability.On the basis of our previous work about the Pt, Pt-Sn catalysts, we chose theceramic fiber as catalyst support, and completed the assembly of the catalyticinfra-red heater.The performance of the catalytic heater was measured using Pt-Sn/ceramicfiber catalyst. The results show that catalytic combustion can be carried out in awider range of flux and at low temperatures with high heat efficiency. Moreover,the catalytic heater can make use of the casting head gas as energy sourceenvironmentally and efficiently.