The Investigation On Anti-coke And Catalyst Of Steam Reforming Of Kerosene

The kerosene has been used as an important fuel in the engine. In recent years, with the further research on kerosene, the hydrocarbon group of the kerosene is found cracking at a high temperature, and the coke formed will plug the pipeline and affect the normal operation of the engine.Therefore, higher thermal stability of the kerosne is requested in all countries. At this case, the reason for the coke formed below the 640K lies in its internal dissolved oxygen in the fuel, which plays a lead role in the reaction as the free radicals.But if we can decrease the concentration of the dissolved oxygen down to 1 ppm, by which the kerosene will maintain a relatively high thermal stability below 640K.In this article, the way of removing dissolved oxygen in the kerosen is disscused. We take three methods including the chemical, zeolite adsorption and Nitrogen Filling,and compare each other. The results show that Nitrogen Filling method is the most appropriate method nowadays. At the same time, we also discusses the use of chemicals analysis as a new and high-precision method for detecting the dissolved oxygen which can replace the analyzer for dissolving oxygen.kerosene of steam reforming is a strong endothermic reaction. On the one hand, the reaction can decrease the temperature in the system of the engine which reduces the damage to the engine. On the other hand, the reaction can produce high-efficiency, low-pollution hydrogen fuel which can result in higher efficiency, if it is applied in the engine. About the latent heat of kerosene, we discuss its hydrogen production efficiency in this paper. Because of the high thermal efficiency, storage and transportation convenience, it is used as a hydrogen material which has huge potential commercial value. Light hydrocarbon of steam reforming into hydrogen is the most economical, the most important industrial line.In this paper, the catalyst for steaming reforming into hydrogen is developed, supported by La- Ni-K/cordierite as the main body. We discusse the different conditions in the stability of catalyst and the efficiency of hydrogen production. The catalysts obtained under different calcination temperatures and different reaction temperatures are characterized by TG-DTG-SDTA, XRD and SEM techniques, respectively, and are tested in the fixed bed reactor. The experimental results indicate the catalyst, supported the promoter 5wt. %K₂O, 25m. %NiO and 10wt. %La₂O₃, has excellent activity, stability and resistance to carbon deposition under 773 K of reaction temperature, 873 K of calcination temperature, 3 h^-1 of space velocity and S/C=3.5.The catalyst has a good prospect in application.