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为了弄清 MgWO_4独特载体性质的主要原因,在一大气压和500℃下,Rh—MgWO_4催化剂上进行了正庚烷和水蒸汽反应动力学的研究。己证明由实验得到的初反应速度 r_o〔克分子/克·分〕最佳地表示为下列速度方程:r_o=kP_(C7)~o P_(H2)~o/(1+KP_(o7)~o)式中 k(=3.4±0.2克分子/克·分·大气压)是表观速度常数,p_j~o 是在进料气中 j 组分的分压,K(=230大气压~1_1)是正庚烷吸附平衡常数。由 r_o 和 p_(C7)~o 的关系可以启示:Rh—MgWO_4催化剂的高活性应归结为正庚烷在这种催化剂表面上中等强度吸附的结果。并进一步以催手衡的观点故论了转化气体的组成特征。
In order to understand the main reason of the unique nature of MgWO_4, the kinetics of n-heptane and steam reaction on Rh-MgWO_4 catalyst was investigated at one atmosphere pressure and 500 ℃. It has been shown that the initial reaction rate r_o [gm / g · min] obtained experimentally can best be expressed as the following velocity equation: r_o = kP_ (C7) ~ o P_ (H2) ~ o / (1 + KP_ (o7) o) where k (= 3.4 ± 0.2 moles / g · atm) is the apparent velocity constant, p_j ~ o is the partial pressure of the j component in the feed gas, K (= 230 atm ~ 1_1) Heptane adsorption equilibrium constant. From the relationship between r_o and p_ (C7) ~ o, we can see that the high activity of Rh-MgWO_4 catalyst should be attributed to the adsorption of n-heptane on the surface of this catalyst. And further to the reminder of the balance of views of the composition of the characteristics of the conversion gas.