DECOMPOSITION OF N2O OVER LOW-COST CATALYST
IntroductionFluidized bed combustion is a coal combustion technology which could reduce both SO, and NO emission. However, the emission of N2O from a fluidized bed combustor is usually quite high 1. N2O is a kind of strong greenhouse gas with long lifetime in atmosphere. Furthermore, it depletes ozone in stratosphere 2. Thus, the control of N2O emission is an important issue for fluidization bed combustion technology. A series of methods can be potentially employed to control N2O emission, of which catalytic decomposition (N2O → N2+1/2O2) offers distinguished advantages over other technologies 3. For catalytic decomposition method, many catalysts including noble metals, metal oxides, mixed metal oxides and zeolites exchanged/impregnated transition metal ions have been tested 3. Iron oxide is attractive for its catalytic potential, low cost and wide availability. Many researches have been conducted on it. For example, Fe-ZSM-5 and Fe2O3/Al2O3, catalysts have been both investigated for N2O catalytic decomposition 4, 5. Meanwhile, it has been found that the catalysts activity towards N2O decomposition is often significantly affected by various gas species in flue gas 2. The purpose of this research is to investigate the potential of the low-cost catalyst prepared from fly ash (as the catalyst support) and iron oxide for N2O decomposition. The influences of the coexisting gases, e.g. O2, CO2, H2O and SO2, on N2O decomposition were thoroughly studied.
Xinfang Yang Yuqun Zhuo Tianjin Li Changhe Chen Xuchang Xu
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Thermal Engineering Tsinghua University Beijing, 100084, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
147-148
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）