Total oxidation catalysts based on manganese or copper oxides and platinum or palladium II: Activity, hydrothermal stability and sulphur resistance

Ferrandon, Magali; Carnö, Johanna; Järås, Sven; Björnbom, Emilia

doi:10.1016/s0926-860x(98)00327-5

Cited by 54 publications

(34 citation statements)

References 9 publications

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“…Moreover Pd has a greater influence on the reduction of hopcalite than Pt. These observations are in line with previous activity results [34]. For hopcalite modified with gold a shift of the reduction peaks towards higher temperatures in relation to CuMn300 was obtained that is in accordance with results reported by Solsona et al [41] concerning manganese catalysts modified with Au.…”

Section: Resultssupporting

confidence: 93%

“…Moreover, studies concerning an application of the mixtures of noble metals and copper or manganese oxides indicate that they can display higher activity in oxidation processes than monometallic catalysts [33][34][35][36]. Furthermore, they can be also more resistant in the presence of sulphur compounds such as SO x , which are produced in oxidative atmosphere from VOCs containing sulphur, and have a very strong deactivation effect on the catalysts [34].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, they can be also more resistant in the presence of sulphur compounds such as SO x , which are produced in oxidative atmosphere from VOCs containing sulphur, and have a very strong deactivation effect on the catalysts [34].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Thermal Treatment and Noble Metal Addition on Hopcalite Activity in Oxidation of Thiophene

et al. 2008

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In this paper the comparison of activity of hopcalite (Mn-Cu mixed oxides) modified with noble metals (Pd, Pt and Au) calcined at 300, 400 and 500°C in oxidation of thiophene was presented. Hopcalite modified with Pd demonstrated the highest activity among the studied samples, thus the results of a more detailed study of the most promising palladium catalyst were also shown. Surface and bulk properties of catalyst were studied with BET, XRD, TPR H2 and TG-DTA-MS. The redox properties and distribution of active components on the catalyst surface seem to be important factors influencing the modified hopcalite performance in the oxidation reactions. It was found that irreversible changes occurred during thermal treatment in the Pd-modified hopcalite structure, however they have no marked influence on activity of modified catalysts.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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The Influence of Thermal Treatment and Noble Metal Addition on Hopcalite Activity in Oxidation of Thiophene

et al. 2008

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“…Focusing on 15 the monolith with similar characteristics (0.95%Pd/NaZSM-5) to our monolithic catalyst, the T 50 was 246ºC and 243ºC for coated monoliths with an amount of ZSM-5 of 14.6%wt and 24.3%wt, respectively. Ferrandon et al [39] studied the total oxidation of mixtures with 20 different concentrations of the same aforementioned pollutants, including 50 ppm of naphthalene (GHSV = 23000 h -1 , catalyst volume 6.5 ml). The monoliths used were composed of cordierite honeycomb monoliths (400 cps) wash-coated with γ-Al 2 O 3 and used as supports for noble metal catalysts (Pd or Pt, 0.1mol%), 25 metal oxides (MnO x CuO x ,10 mol%) and combinations of noble metals with metal oxides.…”

Section: Catalytic Performance In the Oxidation Of Naphthalenementioning

confidence: 99%

Total oxidation of naphthalene at low temperatures using palladium nanoparticles supported on inorganic oxide-coated cordierite honeycomb monoliths

Varela-Gandía

Berenguer-Murcia

Lozano‐Castelló

et al. 2013

Catal. Sci. Technol.

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A study on the preparation of thin films of ZSM-5 and BETA zeolites, and a SAPO-5 silicoaluminophosphate, supported on cordierite honeycomb monoliths by in situ synthesis was carried out for their use as catalyst supports. Furthermore g-Al 2 O 3 was also coated onto a cordierite honeycomb monolith by a dip-coating method for use as a standard support. Structured monolithic catalysts were prepared by impregnation of the aforementioned coated monoliths with polymer-protected Pd nanoparticles. The monolithic catalysts have been tested for the total oxidation of naphthalene (100 ppm, GHSV 1220 h À1 ). From the combined use of the zeolite with polymer-protected nanoparticles, enhanced catalytic properties have been found for the total abatement of naphthalene. The Pd/MBETA and Pd/MZSM-5 catalytic monoliths have shown excellent activity with a high degree of stability, even after undergoing accelerated ageing experiments.

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“…Mixed catalysts containing noble metals (Pt, Pd, Rh) and transition metal oxides for catalytic close-coupled converters operating at high temperatures [1] are more perspective. Such compositions are attractive due to a synergetic effect of noble metal and transition metal oxide in the oxidation of different hydrocarbons [2][3][4][5][6][7][8]. A mixed catalyst containing Mn 2 O 3 and Pd or Pt exhibits higher activity in methane oxidation than the catalysts containing Pt and Pd [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

Development of monolithic catalysts with low noble metal content for diesel vehicle emission control

et al. 2007

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The chemical composition of the catalyst containing Mn-Al-O and Pt has been developed on the basis of the synergetic effect of Pt and manganese oxides observed in the HC and CO oxidation reactions. This effect allows decreasing the Pt loading to 0.70 g/L in the catalytic systems of diesel engine exhaust gases and provides high activity in low temperature oxidation of light and heavy hydrocarbons, and high thermal stability. It has been found that the catalytic activity of Pt-Mn-Al monolithic catalysts in butane oxidation and DIESEL tests depends on the Pt precursor and Pt loading. At similar Pt loadings (1.06 g/L), the catalytic activity increases in the order H 2 PtCl 6 $ H 2 [Pt(OH) 6 ] < Pt(NO 2 ) 2 (NH 3 ) 2. When one Pt precursor is used, the catalytic performance improves with Pt loading increase from 0 to 1.06 g/L, and being nearly constant at higher Pt loading (2.65 g/L).

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Total oxidation catalysts based on manganese or copper oxides and platinum or palladium II: Activity, hydrothermal stability and sulphur resistance

Cited by 54 publications

References 9 publications

The Influence of Thermal Treatment and Noble Metal Addition on Hopcalite Activity in Oxidation of Thiophene

The Influence of Thermal Treatment and Noble Metal Addition on Hopcalite Activity in Oxidation of Thiophene

Total oxidation of naphthalene at low temperatures using palladium nanoparticles supported on inorganic oxide-coated cordierite honeycomb monoliths

Development of monolithic catalysts with low noble metal content for diesel vehicle emission control

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