Shaped Catalyst In Hydrocarbon Steam Reforming Process And Application Of Dynamics

In recent years, domestic and international hydrocarbon steam reforming catalyst of abnormal application made great progress. Shaped the main catalyst of the catalyst by changing the shape of the structure, increasing unit volume or surface area per unit mass, changing the catalyst pore volume, pore size distribution, affect the response heat transfer, mass transfer process that affects the catalytic activity, selectivity and stability so as to improve catalyst efficiency, lower pressure drop in fixed bed reactor and other effects.Shape the dynamics of conventional catalyst, the literature has a relatively complete data for reference, but shaped steam reforming catalyst accurate calculation of kinetic data is still difficult. Shaped catalyst performance data current is still mainly rely on measurement, but with universality and regularity of the kinetics is still lacking. Established for the shaped catalyst of the mass transfer of a mathematical model of coupled heat, be complex partial differential equations, to obtain high-precision concentration and temperature distribution, many algorithms the complexity of computing a large degree of difficulty, skills strong. In this paper, shaped hydrocarbon steam reforming catalyst theory and application in industrial devices collect data, using finite element method, solution method is simple, fast, accurate, dead-shaped catalyst balance large and complex to solve regional specificity also not to create difficulties for solving the model,mathematical model is easily extended to the complex shape of the conversion catalyst. To test the model, the gradient magnetic stirring internal recycle reactor 570-770℃,3.0MPa experimental conditions, spherical shape and the wheels on the tin catalyst forms the intrinsic dynamics and kinetics were studied established the power function Several types of the kinetic equation. Application of this model catalyst Kinetics of experimental points were calculated to obtain the concentration, temperature and other parameters of the distribution in the catalyst, and further calculate the efficiency factor, calculated and experimental results was proved that the model is reliable.Shaped catalyst for hydrocarbon steam reforming process in the production device has been widely applied to reduce the resistance of the reactor was reduced to improve the space velocity, air flow increases the contact area to operating temperature and other operating conditions are improved. Compared with the conventional Raschig ring greatly enhanced the efficiency of the catalyst. So greatly improved the effectiveness of the manufacturer.