The invention relates to a Samarium-Doped iron-based denitrification catalyst with water resistance and sulfur resistance and a preparation method thereof, belonging to the preparation field of iron-based denitrification catalyst. The preparation method comprises the following steps: 1) dissolving iron salt and samarium salt in deionized water, then adding citric acid, stirring, and obtaining the mixed liquid. 2) The gel was obtained by slowly stirring and drying the mixture in the oil bath pot, and most of the water was removed by steaming and drying in the oil bath, then the impurity ions were removed by drying and calcination to ensure the performance of the catalyst. 3) the gel in step 2 is placed in a heating furnace for calcination. The Samarium-Doped iron-based denitrification catalyst prepared by the invention greatly reduces the catalytic temperature of the catalyst by adding samarium into the iron oxide, improves the operating temperature window of the low-temperature NH3_SCR, and at the same time, the obtained catalyst has very stable water resistance and sulfur resistance; meanwhile, the preparation method of the invention is simple and the operation is simple. Convenient and very promising.
【技术实现步骤摘要】
一种具有抗水抗硫性能的钐掺杂铁基脱硝催化剂及其制备方法
本专利技术涉及铁基脱硝催化剂制备领域,尤其涉及一种具有抗水抗硫性能的钐掺杂铁基脱硝催化剂及其制备方法。
技术介绍
固定源(燃煤电厂、工业炉窑和化工厂等)排放的尾气中的氮氧化物引起了严重的环境问题,而煤燃烧后产生的氮氧化物是造成酸雨,光化学烟雾,雾霾和温室效应的主要原因,对人类的生产生活造成了严重影响。因此,有效控制固定源的氮氧化物排放已迫在眉睫。近年来,工业上商业用脱硝催化剂主要采用V2O5-WO3/TiO2催化剂,其催化活性温度范围为300-400℃,与烟气出口处温度一致,因此脱硝装置被布置在省煤器和除尘器之间,脱硫器之前。但由于该催化剂高温区N2选择性不好,同时V2O5易升华且具有生物毒性,会对环境产生二次污染,使其应用受到了很大限制。若采用低温脱硝技术,使催化剂在低温区有较好的催化活性,从而可以将脱硝装置置于除尘和脱硫设备之后,在一定程度上克服现有技术缺点,那么二次污染问题就会迎刃而解。我国煤质含硫量较高,燃煤电厂等固定源排放的尾气中仍旧含有较高组分的SO2,即烟气通过脱硫装置后仍会含有少量的SO2,因 ...
【技术保护点】
1.一种具有抗水抗硫性能的钐掺杂铁基脱硝催化剂,其特在于:所述催化剂的分子式为:FeySmzOx;其中,x为1.0‑1.5,y与z的摩尔比为(0.98‑0.90):(0.02‑0.1)。
【技术特征摘要】
1.一种具有抗水抗硫性能的钐掺杂铁基脱硝催化剂,其特在于:所述催化剂的分子式为:FeySmzOx;其中,x为1.0-1.5,y与z的摩尔比为(0.98-0.90):(0.02-0.1)。2.如权利要求1所述的催化剂,其特在于:优选的,所述催化剂的分子式为:Fe0.98Sm0.02Ox;优选的,所述催化剂的分子式为:Fe0.96Sm0.04Ox;优选的,所述催化剂的分子式为:Fe0.94Sm0.06Ox;优选的,所述催化剂的分子式为:Fe0.92Sm0.08Ox;优选的,所述催化剂的分子式为:Fe0.90Sm0.10Ox。3.如权利要求1或2所述的具有抗水抗硫性能的钐掺杂铁基脱硝催化剂的制备方法,其特在于:所述制备方法包括如下步骤:1)将铁盐、钐盐溶于去离子水中,然后加入柠檬酸,搅拌,得到混合液。2)将步骤1)得到的混合液油浴锅中缓慢搅拌,烘干,得到凝胶;通过油浴蒸干能够除去大部分水,然后通过干燥、煅烧,去除杂质离子,保证催化剂性能。3)将步骤2)中的凝胶置于加热炉中进行煅烧,即得。4.如权利要求...
【专利技术属性】
技术研发人员:孙传智,陈葳,贾轩轩,邹凤霞,
申请(专利权)人:山东师范大学,
类型:发明
国别省市:山东,37
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