Oxidative decomposition of benzene and its methyl derivatives catalyzed by copper and palladium ion-exchanged Y-type zeolites

Becker, L.; Förster, H.

doi:10.1016/s0926-3373(97)00102-1

Cited by 68 publications

(26 citation statements)

References 16 publications

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“…The reactant adsorption/desorption capability is one of the primary factors determining the oxidation performance of a catalyst, which was also demonstrated by Becker and Forster [30]. O-xylene adsorption/desorption capabilities over the fresh catalysts were further investigated, as shown in Fig.…”

Section: Characterization Of the Catalystmentioning

confidence: 69%

Enhanced performances in catalytic oxidation of o-xylene over hierarchical macro-/mesoporous silica-supported palladium catalysts

Qiao

Zhang

et al. 2015

Front. Environ. Sci. Eng.

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A series of hierarchical macro-/mesoporous silica supports (MMSs) were successfully synthesized using dual-templating technique employing polystyrene (PS) spheres and the Pluronic P123 surfactant. Pd was next loaded on the hierarchical silica supports via colloids precipitation method. Physicochemical properties of the synthesized samples were characterized by various techniques and all catalysts were tested for the total oxidation of o-xylene. Among them, the Pd/MMS-b catalyst with tetraethoxysilane/polystyrene weight ratio of 1.0 exhibited superior catalytic activity, and under a higher gas hourly space velocity (GHSV) of 70000 h -1 , the 90% conversion of o-xylene has been obtained at around 200°C. The BET and SEM results indicated that Pd/MMSb catalyst possesses high surface area and large pore volume, and well-ordered, interconnected macropores and 2D hexagonally mesopores hybrid network. This novel ordered hierarchical porous structure was highly beneficial to the dispersion of active sites Pd nanoparticles with less aggregation, and facilitates diffusion of reactants and products. Furthermore, the Pd/MMS-b catalyst possessed good stability and durability.

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Section: Characterization Of the Catalystmentioning

confidence: 69%

Enhanced performances in catalytic oxidation of o-xylene over hierarchical macro-/mesoporous silica-supported palladium catalysts

Qiao

Zhang

et al. 2015

Front. Environ. Sci. Eng.

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“…However, there are two major differences in these two molecules, the hydrocarbon framework structure and the presence Catalyst; Pt supported on H-ZSM-5(23, 80, 140) (•), H-USY(7.5) (▲) and SiO 2 (○). 24) . Figure 11 shows the relation between T50％ in benzene combustion and the amount of adsorbed CO. Pt/SiO2 showed comparable activity to Pt/H-ZSM-5 with Si/Al ratios of 23, 80 and 140.…”

Section: Combustion Of Chlorobenzene (Cbz)mentioning

confidence: 99%

Catalytic Combustion of Dioxin Analogue Compounds on Pt Supported Zeolite

Komatsu

Ooshima

2009

J. Jpn. Petrol. Inst.

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The catalytic combustion of dibenzofuran and chlorobenzene, model compounds for dioxin, was investigated on Pt supported zeolite catalysts. Among transition metals, such as Pd, Au, Ni, etc., Pt supported on H-USY zeolite was the most active and stable for the combustion of dibenzofuran into CO2 and water at 573 K. The reduction treatment on Pt/H-USY before the reaction gave high activity compared with the oxidation treatment. The con version of dibenzofuran was governed by the dispersion of Pt particles irrespective of the acidity and porosity of support materials including zeolites, mesoporous silica and silica gel. The combustion of chlorobenzene on Pt/ zeolite proceeded at much higher temperature than that of benzene. The conversion of chlorobenzene was accel erated by the presence of water vapor in the reactant and the acid sites on zeolite. The activity of Pt/H-ZSM-5 for the combustion of polychlorodibenzofuran, one of dioxin, was discussed from the combustion results of dibenzofuran, chlorobenzene and benzene.

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“…The oxidation of various hydrocarbons, e.g. benzene [19], toluene, benzene and xylene [20] and other organic materials [21], has already been investigated with similar catalysts. However, these chemical processes are costly and energy intensive.…”

Section: Introductionmentioning

confidence: 99%

An integrated system of biological and catalytic oxidation for the removal of o-xylene from exhaust

Zhang

et al. 2007

Catalysis Today

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Biofiltration is an efficient technology for treatment of gaseous waste. Its disadvantages, however, include large volume of bioreactor and slow adaptation to fluctuating concentrations in waste gas. Catalytic oxidation offers a high destructive efficiency at relatively low operating temperature and small unit. A bench scale system integrated with a biofilter and a catalytic oxidation unit for the treatment of gases containing o-xylene was investigated in this study. The catalytic oxidation unit was packed with Cu/Al 2 O 3 catalyst. The results showed that 90% of o-xylene could be removed in the biofilter at the load below 38.2 g m À3 h À1. High o-xylene concentration in inlet gas resulted in an overload of the biofilter. Using the Cu/Al 2 O 3 catalytic oxidation unit, the concentration of o-xylene could be reduced evidently. The combination of the chemical and microbial processes not only led to a high and stable efficiency of o-xylene conversion, but also improved capacity resisting the shock loads. The Cu/Al 2 O 3 was studied for o-xylene oxidation in temperature range of 90-320 8C. The o-xylene conversion was improved correspondingly with the increasing of oxidation temperature. The reaction mechanism of o-xylene oxidation on Cu/Al 2 O 3 was also investigated using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). #

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Oxidative decomposition of benzene and its methyl derivatives catalyzed by copper and palladium ion-exchanged Y-type zeolites

Cited by 68 publications

References 16 publications

Enhanced performances in catalytic oxidation of o-xylene over hierarchical macro-/mesoporous silica-supported palladium catalysts

Enhanced performances in catalytic oxidation of o-xylene over hierarchical macro-/mesoporous silica-supported palladium catalysts

Catalytic Combustion of Dioxin Analogue Compounds on Pt Supported Zeolite

An integrated system of biological and catalytic oxidation for the removal of o-xylene from exhaust

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