Phosphotungstic acid modified nano iron oxide SCR denitration catalyst as well as preparation method and application thereof

The invention discloses a preparation method of a phosphotungstic acid modified nano iron oxide denitration catalyst. According to the method, ferric chloride hexahydrate, hexamethylenetetramine and ethylene glycol are used as raw materials, nanometer iron oxide is prepared through a solvothermal reaction and high-temperature calcination method, and then the phosphotungstic acid modified nanometeriron oxide SCR denitration catalyst is prepared by means of a rotary evaporator and high-temperature activation. The catalyst has strong oxidation-reduction capability, can keep the denitration efficiency at 90% or above in a reaction temperature interval of 240-460 DEG C, and effectively improves the denitration efficiency. The preparation method is simple, and the prepared catalyst is fine in particle, good in dispersity and high in purity and has good medium-high temperature catalytic activity. 本发明公开了一种磷钨酸改性的纳米氧化铁脱硝催化剂的制备方法。该方法是以六水氯化铁、六亚甲基四胺和乙二醇为原料，通过溶剂热反应和高温煅烧的方法制备出纳米氧化铁，然后借助旋转蒸发仪和高温活化制备磷钨酸改性的纳米氧化铁SCR脱硝催化剂。该催化剂具有