论文部分内容阅读
本文采用程序升温表面反应(TPSR)方法,研究了熔铁和沉淀铁催化剂于不同条件下CO、CO/H_2吸附后,在催化剂表面形成的不同加氢活性碳物种的形态和反应性。结果表明,温度对CO解离起重要作用,氢促进了CO的解离和碳化,碳化后催化剂上的CO/H_2吸附,使催化剂表面产生丰富的加氢活性高的α′碳物种。助剂K_2O具有电子效应,可调节催化剂上碳物种的加氢性能。长时间或高温陈化使表面碳活性下降。
In this paper, the temperature-programmed surface reaction (TPSR) method was used to study the morphology and reactivity of different hydrogenated activated carbon species formed on the surface of catalysts after molten iron and precipitated iron catalysts were adsorbed on CO and CO / H 2 under different conditions. The results showed that temperature played an important role in the dissociation of CO. Hydrogen promoted the dissociation and carbonation of CO, and the CO / H 2 adsorption on the catalyst after carbonation resulted in abundant α ’carbon species with high hydrogenation activity on the catalyst surface. The additive K_2O has an electronic effect and can adjust the hydrogenation performance of the carbon species on the catalyst. A long time or high temperature aging to reduce the surface activity of carbon.