Preparation Of Carbon-based Metal Oxide Composite And Its Application In The Water Gas Shift Reaction

Carbon nanomaterials has been widely used in many area due to its excellent physical and chemical properties. The composite consisted of carbon material, metal oxide and metal nanoparticles takes on considerable applications in energy and environmental.This thesis devote its effort both to develop a simple method for preparing nano carbon composite with high catalytic activity and larger surface area,and to develop a cost-effective way to construct composite consist of metal oxide and carbon nanomaterials.By solvent-free pyrolysis of ferrocene, and polyvinylpyrrolidone (PVP) preparation of carbon-coated metal oxides carbon-based composite materials. Study the effects of temperature, time and feed ratio on the morphology of the product, optimization of the process parameters, and by XRD, SEM the crystal structure and morphology were characterized. Synthetic composites take water-gas shift reaction catalytic performance tests on catalyst performance evaluation device. Experimental results show that at a temperature of 500?, time was 4h, ferrocene:PVP= 1:5 the product show spherical morphology and dispersion better. Catalytic tests showed that the prepared carbon-coated metal oxides composites have some catalytic properties, but the activity is not high.By solvent pyrolysis of octacarbonyldicobalt, and polyvinylpyrrolidone (PVP) preparation of carbon-coated cobalt oxide carbon-based composite materials. The optimal parameters of the application of the test applied, and the morphology was characterized by SEM, results showed the product evenly vertically grown on the substrate surface. Catalytic tests showed that the prepared carbon-coated metal oxides composites have some catalytic properties, different catalytic activity in different solvent systems.By solvent pyrolysis of ferrocene octacarbonyldicobalt, and polyvinylpyrrolidone (PVP) preparation of carbon-coated iron, cobalt oxide coexistence carbon-based composite materials(carbon-coated metal ferrite). Application of optimal parameters of the experiment in the test, and by XRD, SEM the crystal structure and morphology were characterized, the results show that when PVP excess the particles are not fully grown, while showing a small amount of sea urchin-like structure when PVP exile. Catalytic tests showed that the prepared coated carbon composites have some catalytic properties, but the activity is not high, heat resistance is not good.By carrying coal gangue molecular sieve in a nitrogen environment without solvent pyrolysis of ferrocene octacarbonyldicobalt, and polyvinylpyrrolidone (PVP) preparation of cobalt oxide, metal oxides, carbon-coated iron, cobalt coexistence oxide carbon-based composite materials and by XRD, SEM the crystal structure and morphology were characterized, SEM results showed that the particles are uniformly dispersed in the surface of the molecular sieve. Catalytic tests showed that the prepared coated carbon composite material without catalytic properties.This preparation method provides a simple, one-step preparation of carbon-coated metal oxide composites, and to study their catalytic properties in the Water-gas shift reaction. Tests showed that carbon-coated metal oxides composites have some catalytic properties, but the activity is not high. We promote the above method for preparing iron, cobalt coexistence oxide carbon-based composite materials and study its catalytic in the Water-gas shift reaction. Experiments show that ferrocene accounted for the major proportion of poor catalytic properties of the catalyst prepared, and octacarbonyldicobalt accounted for the major proportion of poor catalytic properties of the prepared catalysts. The catalyst carrier carrying coal waste as little activity.