铁取代介孔磷铝分子筛的合成、表征及其催化性能  

Synthesis,Characterization and Catalytic Performance of Trivalent Fe-substituted Mesoporous Aluminophosphate Molecular Sieves

作　　者：李新柱[1] 任海伦[2] 杨树林[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]中国石油吉林石化分公司研究院,吉林吉林132021

出　　处：《过程工程学报》2009年第2期408-412,共5页The Chinese Journal of Process Engineering

摘　　要：以水热晶化法合成了Fe取代介孔磷铝分子筛,并用XRD,FT-IR,N2吸附等对其进行了表征.结果表明,合成的分子筛为缺乏长程有序的介孔结构,具有较高的比表面积.在焙烧后的分子筛中,Fe3+离子主要以四配位的形式存在于骨架中.该分子筛能有效催化氧化水溶液中苯酚,在反应温度60℃、苯酚起始浓度3mmol/L、加入45mmol/LH2O2、溶液起始pH值4.5的条件下,4h后苯酚去除率达99.5%,COD去除率达87.9%,且催化剂性能稳定,反应过程中有极少量Fe3+离子流失.Fe-substituted aluminophosphate molecular sieves were prepared by hydrothermal crystallization and characterized with XRD, FT-IR, N2 adsorption, etc. The results showed that the samples were the typical mesoporous molecular sieves that were short of the long-range ordered crystal structure and had large surface area, which suggested that Fe^3＋ ion was successfully incorporated into the framework of molecular sieves and mainly existed in tetrahedral coordination after calcination. Fe-substituted aluminophosphate molecular sieves were effective for catalytic oxidation of phenol in aqueous solution with H2O2 as oxidant. Under the conditions of reaction temperature 60 ℃, reaction time 4 h, phenol initial concentration 3 mmol/L, H2O2 initial concentration 45 mmol/L and pH 4.5, the removal rates of phenol and COD reached 99.5% and 87.9%, respectively. Their catalytic performance was stable and the concentration of Fe^3＋ leaching-off was little in catalytic oxidation of phenol in aqueous solution.

关 键 词：介孔磷铝分子筛 FE 苯酚 催化氧化 

分 类 号：TQ426.6[化学工程]