Catalytic decomposition of toluene over La1-xSr xMnO3/palygorskite synthesized catalysts

• Autorzy: Song L. , Chen T. , Chen D. , Chen Y. , Xie J. , Liu H.
• Języki publikacji: EN

Abstrakty

EN

Palygorskite (PG) supported La1-xSrxMnO3 catalysts were fabricated by copreripitation. The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area (SSA) and H2 temperature programmed reduction (H 2-TPR). Catalytic activity for VOCs was examined by using toluene as a model compound. The results show that the surface area as well as mechanical strength of catalysts increase substantially after catalysts loaded in PG. XRD patterns show that after calcination at 700 0C, PG as a support in 9% LaMn03/PG and 9% La0.7Sr0.3MnO3/PG was transformed into amorphous phase and the morphology was not destroyed. It was well established that the main reductive components are factually Mn(III) or Mn(IV) oxides in catalysts based on the results of TPR. It was also found that Mn(IV) increases while Mn(III) reduces responding with the increasing amount of Sr. Toluene conversion rate of as-preparedμ% La1-xSr xMnO3/PG increases with the increasing values of x and μ when x=0-0.3 and μ = 3-9%. Toluene can be converted completely at 285 0C by 9% La0.7Sr0.3MnO3/PG catalyst while no significant change was observed after addition on the doping and loading amount of Sr. During a 100 h stability experiment of 9% La 0.7Sr0.3MnO3/PG catalyst, toluene removal was found to be above 95%.

Słowa kluczowe

EN

catalysts; manganese; manganese oxide; toluene; transmission electron microscopy; X ray diffraction; Palygorskite

PL

katalizatory; mangan; tlenek manganu; toluen; transmisyjna mikroskopia elektronowa; dyfrakcja promieniowania rentgenowskiego; Palygorskite

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2013
• Tom: Vol. 39, nr 3
• Strony: 31--42
• Opis fizyczny: Bibliogr. 28 poz., tab., rys.

Twórcy

autor

Song L.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

autor

Chen T.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

autor

Chen D.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

autor

Chen Y.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

autor

Xie J.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

autor

Liu H.

• School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

Bibliografia

• [1] GROPPI G., CRISTIANI C., FORZATTI P., Preparation, characterization and catalytic activity of pure and substituted La-hexaaluminate systems for high temperature catalytic combustion, Appl. Catal. B, 2001, 35, 137.
• [2] GRZYB K., MUSIALIK-PIOTROWSKA A., RUTKOWSKI J.D., Methane combustion over monolithic catal- ysis, Environ. Prot. Eng., 2006, 32, 5-10.
• [3] CENTI G., CIAMBELLI P., PERATHONER S., RUSSO P., Environmental catalysis: trends and outlook, Catal. Today, 2002, 75, 3.
• [4] DRAGO R.S., JURCZYK K., SINGH D.J., YOUNG V., Low-temperature deep oxidation of hydrocarbons by metal oxides supported on carbonaceous materials, Appl. Catal. B, 1995, 6, 155.
• [5] PAPAEFTHIMIOUA P., IOANNIDESA T., VERYKIOS X.E., Combustion of non-halogenated volatile organ- ic compounds over group VIII metal catalysts, Appl. Catal. B, 1997, 13, 175.
• [6] MUSIALIK-PIOTROWSKA A., Effect of platinum doping on activity of LaMnO3 in oxidation of volatile organic compounds, Environ. Prot. Eng., 2008, 34, 157.
• [7] ZHOU J.C., Wu D.F., JIANG W., Li Y.D., Catalytic combustion of toluene over a copper-manganese- silver mixed-oxide catalyst supported on a wash coated ceramic monolith, Chem. Eng. Technol., 2009, 32, 1520.
• [8] Li J.F., YAN N.Q., QU Z., QIAO S.H., YANG S.J., Guo Y.F., LIU P., JIA J.P., Catalytic oxidation of ele- mental mercury over the modified catalyst Mn/a-Al2O3 at lower temperatures, Environ. Sci. Technol., 2010, 44, 426.
• [9] SANZ O., ECHAVE F.J., SANCHEZ M., MONZÓN A., MONTES M., Aluminium foams as structured sup- ports for volatile organic compounds (VOCs) oxidation, Appl. Catal. A, 2008, 340, 125.
• [10] BERTINCHAMPS F., GREGOIRE C., GAIGNEAUX E.M., Systematic investigation of supported transition metal oxide based formulations for the catalytic oxidative elimination of (choro)-aromatics. Part I. Identification of the optimal main active phases and supports, Appl. Catal., B, 2006, 66, 1.
• [11] SOLEYMANI M., MOHEB A., BABAKHANI D., Hydrogen peroxide decomposition over nanosized La1-xCaMnO3 (0
• [12] LEVASSEUR B., KALIAGUINE S., Effect of the rare earth in the perovskite-type mixed oxides AMMnO3 (A = Y, La, Pr, Sm, Dy) as catalysts in methanol oxidation, J. Solid State Chem., 2008, 181, 2953.
• [13] ROUSSEAU S., LORIDANT S., DELICHERE P., BOREAVE A., DELOUME J.P., VERNOUX P., La(1-x)Srx- -Co1-yFeyO3 perovskites prepared by sol-gel method: Characterization and relationships with catalytic properties for total oxidation of toluene, Appl. Catal., B, 2009, 88, 438.
• [14] NITADORI T., KURIHARAM S., MISONO M., Catalytic properties of La1-xA'xMnO3 (A' = Sr, Ce, Hf), J. Catal., 1986, 98, 221.
• [15] PONCE S., PENA M.A., FIERRO J.L.G., Surface properties and catalytic performance in methane combustion of Sr-substituted lanthanum manganites, Appl. Catal. B, 2000, 24, 193.
• [16] MACHOCKI A., IOANNIDES T., STASIŃSKA B., GAC W., AVGOUROPOULOS G., DELIMARIS D., GRZEGORCZYK W., PASIECZNA S.,Manganese-lanthanum oxides modified with silver for the catalytic combustion of methane, J. Catal., 2004, 227, 282.
• [17] BATIS N.H., DELICHERE P., BATIS H., Physicochemical and catalytic properties in methane combustion of La1-xCaMnO3±y (0 < x < 1; -0.04
• [18] DENG J., ZHANG Y., DAI H., ZHANG L., HE H., AU C.T., Effect of hydrothermal treatment temperature on the catalytic performance of single-crystalline Lag5Sr0jMnO3-s microcubes for the combustion of toluene, Catal. Today, 2008, 139, 82.
• [19] DENG J.G., DAI H.X., JIANG H.Y., ZHANG L., WANG G.Z., HE H., AU C.T., Hydrothermal fabrication and catalytic properties of La1-xSrxM1-yFeyO3 (M = Mn, Co) that are highly active for the removal of toluene, Environ. Sci. Technol., 2010, 44, 2618.
• [20] CHEN T.H., XU H.F., PENG S.C., WANG J.Q., XU X.C., Nanometer scale study on reaction of palygorskite with acid: reaction mechanism and change of specific surface area, Geolog. J. Chin. Univ., 2004, 10, 98.
• [21] SONG L., CHEN T.H., Li Y.X., LIU H.B., KONG D.J., CHEN D., Performance of palygorskite supported Cu-Mn-Ce catalyst for catalytic oxidation of toluene, Chin. J. Catal., 2011, 32, 652.
• [22] LIU H.B., CHEN T.H., ZHANG X.L., LI J.H., CHANG D.Y., SONG L., Effect of additives on catalytic cracking of biomass gasification tar over nickel-based catalyst, Chin. J. Catal., 2010, 31, 409.
• [23] Li J.H., ZHANG X.L., CHEN T.H., LIU H.B., SHI P.C., Characterization and ammonia adsorption- desorption of palygorskite-supported manganese oxide as a low-temperature selective catalytic reduction catalyst, Chin. J. Catal., 2010, 31, 454.
• [24] CHEN T.H., XU X.C., Yu S.C., Nanometer mineralogy and geochemistry of palygorskite clays in the border of Jiangsu and Anhui provinces, Chin. Sci. Press., Bei Jing, 2004.
• [25] CHEN T.H., WANG J., QING C.S., PENG S.C., SONG Y.X., GUO Y., Effect of heat treatment on struc- ture, morphology and surface properties of palygorskite, J. Chin. Ceram. Soc., 2006, 34, 1406.
• [26] Li W.B., GONG H., Recentprogress in the removal of volatile organic compounds by catalytic combustion, Acta. Phys. Chin. Sin., 2010, 26, 885.
• [27] STEGE W.P., CADUS L.E., BARBERO B.P., La1-xCa,MnO3 perovskites as catalysts for total oxidation of volatile organic compounds, Catal. Today, 2011, 172, 53.
• [28] MING C.B., YE D.Q., LIU Y.L., YANG L., Effect of precious metal loaded on LaMnO3 on catalytic oxidation of soot, Chin. Environ. Sci., 2008, 29, 576.