应用于海水烟气脱硫的陶瓷负载氧化铁催化剂的制备及表征  

The preparation and characterization of ceramic supported ferric oxide catalyst for seawater flue gas desulfurization application

作　　者：张舒[1] 卞俊杰[1] 李春虎[1] 

机构地区：[1]中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《功能材料》2011年第B04期358-361,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20906085)

摘　　要：以FeSO4为原料,分别采用浸渍沉淀(Ⅰ)和溶胶-凝胶法(Ⅱ)制备了轻质陶瓷负载氧化铁催化剂。研究了制备方法和焙烧温度对负载后氧化铁层的结构、形貌和团聚状况的影响。Ⅱ法制备的催化剂有较高SO2脱除活性,使用SEM-EDS,XRD,XPS和H2-程序升温脱附(H2-TPR)等表征结果可以看出,Ⅱ法制备的催化剂有13.28%(质量分数)的氧化铁负载于陶瓷表面,负载后Fe的价态为+3,还原峰温度分别为380和600℃,依次对应Fe2O3还原为Fe3O4以及Fe3O4还原为FeO的两个过程。由于陶瓷表面具有良好的亲水性,同时负载后的氧化铁在其表面有较高的分散性,使得该催化剂的低温脱硫活性较高,适用于燃用中高硫煤的沿海电厂的海水烟气脱硫过程。Ceramic supported iron dioxide catalysts were synthesized by precipitation （ Ⅰ ） and sol-gel （ Ⅱ ） methods using FeSO4. It was studied the effect of preparation methods of catalysts and calcination temperature on the structure, morphology, and agglomeration of supported ferric oxide. The catalyst prepared by method Ⅱ had higher SO2 removal efficiency. The samples were characterized by SEM-EDS, XPS, XRD and H2-TPR. EDS showed 13.28（wt%） of iron oxide had supported on ceramic surface which prepared by method Ⅱ The valence of iron was ＋3 by XPS. TPR experiments showed the reduction peaks at 380 and 600℃, attributed t0 Fe2O3 to Fe3O4, and Fe3O4 to FeO. Because of the excellent hydrophily of ceramic and high dispersibility of Fe2O3, in ceramic surface, this catalyst had high SO2 removal efficiency in low temperature. So it can be used in seawater flue gas dcsulfurization （FGD） process for coastal power plants, which burning the high-sulfur coal.

关 键 词：海水脱硫 氧化铁 陶瓷填料 催化剂制备 

分 类 号：O643[理学—物理化学] TB331[理学—化学]