Oxyfuel Catalytic Methane Combustion By Fe-based Perovskite

Natural gas (methane) is the one of the world's leading energy. However, like other fossil fuels, methane combustion process will inevitable produce carbon dioxide, carbon monoxide and toxic gases such as nitrogen oxides. Catalytic combustion is a kind of environment-friendly technologies. Compared with ordinary combustion, catalytic combustion with high combustion efficiency and energy utilization,Natural gas (CH4) than oil, coal, fuel pollution levels low, in the process of combustion emissions of C02, S02 and NOx and other pollutants less. Catalytic combustion of natural gas can achieve ultra-low emissions of pollutants, is a promising combustion technology. People have carried out a lot of research. At the same time, with the worsening of the greenhouse effect, in order to reduce CO2 and other greenhouse gases on the further destruction of the global environment, natural gas thermal power in the people to the idea of CO2 collection. If caught before combustion, combustion and after the capture oxygen combustion. In this three ways, the catalytic combustion of methane oxygen used to replace the traditional air combustion of methane is of great significance, for example, through combustion and chemical recycling advanced zero-emission power stations, can only produce water and carbon dioxide, this will be conducive to collection and storage of carbon dioxide, and thereby reduce carbon dioxide damage to the environment.In this paper, using a sol gel prepared by several new categories of perovskite oxides, the study of ion-doped perovskite-type doped complex oxide catalyst catalytic properties of methane. The X-ray diffraction (XRD) analysis of a sample of technical crystal structure, particle size and lattice parameters, to seek out BET surface area method, using XPS, and other technical characterization of the physical and chemical properties of the catalyst to a n-catalytic combustion reaction to probe samples studied the catalytic activity and its physical and chemical properties of the association. In this paper, Chapters I and II introduces the catalytic combustion of methane and the background of the current main significance of methane catalytic combustion catalyst classification. The third chapter details the layered structure of complex oxides Sr4Fe6-xCoxO13 system of catalytic combustion results of the study. Sr4Fe6-xCoxO13 material has a high catalytic activity and excellent combustion chemical and thermodynamic stability. Studies show that most researchers are concerned about the large number of balance by adding low partial pressure of oxygen in the air to study the catalytic combustion of methane, few researchers concerned about the pure oxygen under conditions of catalytic combustion of methane. In this paper, we reported the name of the Sr4Fe6-xCoxO13 the high partial pressure of oxygen and oxygen partial pressure change under the conditions of catalytic actions, our objective is to study the crystal structure of the activity of catalysts, of which we are particularly concerned about the layers perovskite-type structure, partial pressure of oxygen on the catalytic activity of the corresponding also do some research. Chapter IV of our major research-doped double-perovskite structure of the evolution and structure of the doped methane catalytic combustion of pure oxygen, which Sr2FeMoO6 showed better catalytic combustion activity, through our research shows that, despite Double-perovskite in the catalytic combustion of methane few people in the study, but because of their dual-perovskite has a good semi-metallic nature of the electronic and ionic space, which makes double-perovskite could become a promising catalytic combustion catalysts provide good the conditions, our results also illustrates this point.