研究了833～948K和常压下,C_7H_(16)在镍催化剂上进行水蒸汽转化过程中的积碳反应动力学,获得了相应的动力学方程.并探讨了相应的反应机理,提出在镍表面同时进行的水蒸汽转化和积碳反应是两个相对独立的反应.指出在较高温度下,水蒸汽会从简单非解离吸附转变为解离吸附,这一变化不仅改变了反应级数,更重要的是它提高了水蒸汽参与表面反应的能力,特别是加强了氢对积碳反应的作用;同时庚烷的吸附热也随之产生相当大变化.分析了出现在本温度区内积碳反应负表观活化能的来源. The kinetics of carbon deposition during steam reforming of C_7H_ (16) at 833 ~ 948K and C_7H_ (16) on nickel catalyst was studied, and the corresponding kinetic equation was obtained. The corresponding reaction mechanism was also discussed. Simultaneous surface steam reforming and carbon deposition are two relatively independent reactions, pointing out that at higher temperatures, water vapor shifts from simple non-dissociative adsorption to dissociative adsorption, and this change not only changes the reaction order , More importantly, it enhances the ability of water vapor to participate in the surface reaction, especially strengthens the effect of hydrogen on the carbon deposition reaction; meanwhile, the heat of heptane adsorption also changes a lot. Source of negative apparent activation energy for carbon deposition.