| 초록 |
Chemical-looping combustion (CLC) is an alternative thermal power generation system for provision against environmental regulation of greenhouse gases and it has advantage of no energy loss for separation of CO2 without nitrogen oxide formation. This process consists of oxidation and reduction reactors where metal oxide particles are circulating through these two reactors. In this study, semi-continuous and continuous CLC operations were carried out in an annular shape fludized bed reactor. It is composed of two bubbling fluidized bed zones with core and annular sections for effective heat transfer between exothermic oxidation and endothermic reduction reactions. This system also provides enough residence time for each reaction and can be separated by each reaction zone. The selected metal oxides, NiO and Fe2O3 supported on bentonite were prepared for the CLC process. The combustion efficiency was determined based on the gas composition of CO2, CO and H2 in flue gas. Considerations of CO and H2 are below 10% with NiO, while Fe2O3 exhibits lower reactivity. |
