【摘要】 利用浆态床 F-T 合成反应,经长周期试验数据估算宏观反应动力学参数。用多组分数学模型,考虑了反应器内催化剂浓度间歇变化,并引入催化剂活性修正因子,采用正交排列与单纯形方法进行计算。最后用得到的动力学参数进行模拟计算,合成气转化率预报值与实测值相对误差2.5%,最大误差7.7%。可以认为采用的数学模型及动力学参数可以描述用沉淀铁催化剂,进行浆态床 F-T 合成反应的结果。更多还原

【Abstract】 Parameters in the kinetic equation,— r_CO+H2=kc_H2/[1+(Kc_CO2/c_CO)],used for Fischer- Tropsch synthesis were estimated by means of a simplicial method and the method of orthogonal collocation.The reactor model used is a multicomponent mathematical model which considers the changes of catalyst concentration and activity in a bubble column slurry reactor（BCSR）.When the ratio of H₂/CO in syngas is less than 0.8,and catalysts concentration in BCSR is expressed as C_cat（n）=sum from i=0 to n-1 y_ni multiply from j=i+1 to n-1 (1-γα_nj) the parameter values predicted are as follows: k=1.36×10⁹exp[-100.0/（R×T）-3.0×10^-4τ_m] K=0.204 where,k-rate constant,K-ratio of adsorption constant（Kco₂/Kco）. The relative error and maximum error between the observed and the predicted results are 2.5 and 7.7 percent respectively.It is considered that the multicomponent model and the kinetic parameters can be successfully applied to describe previous results from a bench-scale pilot plant for slurry Fischer-Tropsch synthesis over precipitated Fe catalysts.更多还原