title: [Synthesis of manganese oxide octahedral molecular sieve and their application in catalytic oxidation of benzene].
abstract: Manganese oxide octahedral molecular sieves (OMS-2) for VOCs catalytic combustion were synthesized by refluxing method. The crystal structure, particle morphology, pore structure and H2-reduction ability were characterized by XRD, SEM, N2 adsorption-desorption and H2-TPR techniques. The catalytic activities of the OMS-2 calcined at different temperatures in benzene combustion and the stability of the sample calcined at 300 degrees C were evaluated. The results indicated that the effect of calcinations temperature on the surface characters of catalysts was remarkable. With higher calcination temperature, the samples showed lower surface area and pore volume, but larger average pore size. At the same time, high calcination temperature leaded to low activity. The benzene conversion of the sample calcined at 300 degrees C was 50% degrees C at 200 degrees C and 90% at 250 degrees C, respectively. The catalytic activity exhibited only 5% reduction after reaction at 260 degrees C for 70 h, which indicated that the as-made catalysts were very stable after calcination at 300 degrees C.
authors.affiliation: State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. dyli@home.ipe.ac.cn
authors.forename: Dong-Yan
authors.initials: DY
authors.lastname: Li
authors.forename: Hai-Di
authors.initials: HD
authors.lastname: Liu
authors.forename: Yun-Fa
authors.initials: YF
authors.lastname: Chen
mesh_terms: D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D001554:Benzene / Q000737:chemistry / Q000302:isolation & purification*; D002384:Catalysis; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000393:Air Pollutants; D017895:Manganese Compounds; D010087:Oxides; D055549:Volatile Organic Compounds; C027424:manganese oxide; D001554:Benzene