Water-Gas Shift Reaction on Iron Promoted Cu Based Catalysts

In the research reported herein, Fe promoted Cu based catalysts were prepared on various oxides supports, and apply these catalysts on water-gas shift (WGS) reaction. In our experience, Cu based catalysts used in WGS reaction may deactivate in a long period, due to partial oxidation of reduced Cu. In this proposal, Fe promoter will be used to improve the activity and stability of Cu catalysts in WGS reaction. In the first year, Cu and Cu-Fe particles will be dispersed on several oxides supports such as SiO2, TiO2 and Al2O3, using an impregnated method. In the second year, the synthesis of Cu and Cu-Fe particles is expected to further performed on SBA-15 with and without carboxylic acid groups. In the third year, the atomic layer deposition technique will be developed to prepare various SiO2 supported Cu-Fe catalysts, using Cu(thd)2 and FeCl3 as the precursors. The active sites and chemical state of all Cu and Cu-Fe catalysts will discussed in relation to the characterization and activity results of the WGS reaction. We used CO as a probe molecule to identify the active sites on the catalysts, because it is a good probe molecule for vibrational spectroscopy and can usually provide important information about the surface sites of adsorbed species and the chemical environment of a copper surface. The reaction mechanism of WGS reaction, active sites for H2O adsorbed and H2O dissociation will be investigated by the IR and TPD techniques. We will build up a flow reaction system combining FT-IR, TPD and GC-TCD techniques. On the other hand, FT-IR also will be applied to perform the kinetic parameters for WGS reaction on Cu and Cu-Fe surfaces. The in-situ X-ray absorption spectroscopy can be used to probe the change of oxidation states of Cu and Fe on catalysts during WGS reaction. The examination of catalysts, by DR-UV/VIS, TPR, XRD, AES and ESCA etc., may be associated with experimental results of TPD and IR.

Project ID:PA10501-0959
External Project ID:MOST103-2113-M182-001-MY3