以煤气化渣（CGS）为载体，采用等体积浸渍法负载1%的钒制备V/CGS催化剂。考察了煅烧温度、预氧化温度对催化剂脱硝活性的影响。经活性评价发现，500℃煅烧、250℃预氧化后的催化剂低温脱硝活性最佳。此外，还考察了空速、SO₂体积分数对V/CGS催化剂脱硝活性的影响。通过XRD、XPS、H₂-TPR以及物理吸附等方法对催化剂结构进行表征。结果表明，V/CGS催化剂中钒主要以V⁵⁺状态存在，经预氧化后V⁵⁺含量相对增加8%，促进了催化剂的脱硝活性。另外，在SCR反应过程中，低浓度SO₂对V/CGS催化剂脱硝具有促进作用。

V/CGS catalysts are prepared by loading 1% of vanadium onto coal gasification slag (CGS) through equal volume impregnation method.The effects of calcination and pre-oxidation temperatures on the catalytic properties of the catalysts for removal of nitrogen oxides are investigated.It is found through activity evaluation that the V/CGS catalyst prepared at a calcination temperature of 500℃ and a pre-oxidation temperature of 250℃ shows the best catalysis properties in low-temperature denitration.Moreover,the effects of gas hourly space velocity (GHSV) and concentration of SO₂ on the catalysis properties of V/CGS catalysts are also investigated.The catalysts structures are characterized by XRD,XPS,H₂-TPR,and N₂ adsorption/desorption analysis methods.It is verified that V element exists as V⁵⁺ in V/CGS catalysts.The pre-oxidation can improve the contents of V⁵⁺ in the catalysts by 8% and thus enhance the catalysis properties.When the catalysts are applied in NH₃-SCR,a few contents of SO₂ in the flue gas can promote the catalysis activity.

高艳春(1992-),男,硕士研究生,研究方向为环境净化,gaoyanchun7519@163.com