Ni–CeO2–ZrO2 Catalysts for Water Gas Shift Reaction: Effect of CeO2 Contents and Reduction Temperature
نویسندگان
چکیده
Ni–CeO2–ZrO2 Catalysts for Water Gas Shift Reaction: Effect of CeO2
منابع مشابه
Active Sites and Mechanism for the Water-Gas Shift Reaction on Metal and Metal/Oxide Catalysts
Current industrial catalysts for the water-gas shift reaction are commonly mixtures of Fe-Cr and Zn-Al-Cu oxides, used at temperatures between 350-500oC and 180250oC, respectively. These oxide catalysts are pyrophoric and normally require lengthy and complex activation steps before usage. Improved catalysts are being sought, particularly for lower temperature (e.g., at T<150oC, equilibrium lowe...
متن کاملMorphology-Dependent Properties of Cu/CeO2 Catalysts for the Water-Gas Shift Reaction
CeO2 nanooctahedrons, nanorods, and nanocubes were prepared by the hydrothermal method and were then used as supports of Cu-based catalysts for the water-gas shift (WGS) reaction. The chemical and physical properties of these catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption/desorption, UV-Vis spectroscopy, X-ray photoelectron spectro...
متن کاملCatalytic Steam Reforming of Toluene as a Model Compound of Biomass Gasification Tar Using Ni-CeO2/SBA-15 Catalysts
Nickel supported on SBA-15 doped with CeO2 catalysts (Ni-CeO2/SBA-15) was prepared, and used for steam reforming of toluene which was selected as a model compound of biomass gasification tar. A fixed-bed lab-scale set was designed and employed to evaluate the catalytic performances of the Ni-CeO2/SBA-15 catalysts. Experiments were performed to reveal the effects of several factors on the toluen...
متن کاملNew Direct Evaluation of Oxygen Storage/Release Capacity on Millisecond Time Scale
The amount of oxygen storage and release from catalysts on a millisecond scale (MS-OSC) is believed to play an essential role in automotive three-way catalysts. We have developed a new method to evaluate the MS-OSC based on the rapid detection of reaction products on catalyst surfaces immediately after CO and O2 injections using pulsed valves by time-of-flight mass spectrometry. CO and O2 were ...
متن کاملEffects of Catalysts and Membranes on the Performance of Membrane Reactors in Steam Reforming of Ethanol at Moderate Temperature
Steam reforming of ethanol in the membrane reactor using the Pd77Ag23 membrane was evaluated in Ni/CeO2 and Co/CeO2 at atmospheric pressure. At 673 K, the H2 yield in the Pd77Ag23 membrane reactor over Co/CeO2 was found to be higher than that over Ni/CeO2, although the H2 yield over Ni/CeO2 exceeded that over Co/CeO2 at 773 K. This difference was owing to their reaction mechanism. At 773 K, the...
متن کامل