逆流连续重整催化剂烧焦表观动力学研究

APPARENT KINETICS OF COKE COMBUSTION OF COUNTERCURRENT CONTINUOUS REFORMING CATALYST

以逆流连续重整装置催化剂为研究对象,利用固定床反应器,在消除外扩散影响的条件下,系统考察了反应温度、氧分压以及碳含量等因素对催化剂烧焦速率的影响规律,并建立了幂级数形式的烧焦表观动力学方程。结果表明:烧焦速率随着反应温度、氧分压以及碳含量的增大而增大,动力学方程中氧的反应级数为0.78,碳的反应级数为0.68,表观反应活化能为9.98×10^(4) J mol。根据该方程可以准确计算不同条件下的催化剂烧焦速率,进而优化再生器的设计参数和操作条件,为逆流连续重整技术的进步奠定了理论基础。

A fixed-bed reactor was used for the study of the catalyst in the countercurrent continuous reforming unit under the condition of eliminating the influence of external diffusion,and the effects of reaction temperature,oxygen partial pressure,and carbon content on the coke combustion rate of countercurrent naphtha catalytic reforming catalyst were systematically investigated.The apparent kinetic equation of coke combustion in power series form was established.The results showed that the burning rate increased with the increase of reaction temperature,oxygen partial pressure,and carbon content.The reaction order for oxygen in the kinetic equation is 0.78,the reaction order for carbon is 0.68,and the apparent reaction activation energy is 9.98×10^(4)J mol.According to the equation,the coke burning rate of catalyst under different conditions could be calculated accurately,and the design parameters and operating conditions of regenerator could be optimized.