【摘要】 为了开发高活性、高抗性的低温NH₃选择性催化还原（NH₃-SCR）催化剂,介绍了4种主要低温脱硝催化剂（贵金属、分子筛、炭基材料和过渡金属氧化物）脱硝活性以及抗硫抗水性能的研究成果,分析了基于原位红外和密度泛函方法的低温脱硝研究。分析认为:由一种或多种金属材料组合的NH₃-SCR催化剂一般具有良好的低温活性,但抗硫、抗水性能有待进一步提升;催化剂的表面酸性酸量特性和活性位点暴露数量与抗硫抗水性能密切相关,脱硝机理有助于分析SO₂和水蒸气对脱硝过程的影响机制。更多还原

【Abstract】 In order to develop low-temperature NH₃ selective catalytic reduction（NH₃-SCR） catalysts with high activity and high resistance,the research regarding the denitration activity,sulfur and water resistance of four main low-temperature denitration catalysts（ precious metals,molecular sieves,carbon-based materials and transition metal oxides） were introduced. In addition,the low-temperature denitration technologies based on in-situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory were introduced. It is concluded that the NH₃-SCR catalysts composed of one or more metal materials generally have good low-temperature activity,but its sulfur and water resistance need further improvement. The surface acidity and the number of active sites exposed are closely related to the sulfur and water resistance of catalysts. Denitration mechanism is helpful to analyze the influence of SO₂ and steam on the denitration process.更多还原