Effect of noble metal deposition in zeolitic structures on their adsorption capacities

Canet, Xavier; Nokerman, J; Frère, Marc; Tidahy, Haingomalala Lucette; Siffert, Stéphane; Su, Bao Lian

doi:10.1016/s0167-2991(07)80030-9

Cited by 2 publications

(6 citation statements)

References 9 publications

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“…[5,9] It has also been proven that, in this same process, zeolites tend to be more active than classical metal-oxide supports once the zeolites are impregnated with Pd.…”

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

“…Furthermore, the deposition of noble metals onto catalytic supports is more advantageous than that of transition metals for the total oxidation of VOCs. [5,9] It has also been proven that, in this same process, zeolites tend to be more active than classical metal-oxide supports once the zeolites are impregnated with Pd.…”

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

“…[30] Cs + -, H + -, and Na + -exchanged BEA and FAU zeolites were studied to investigate how the acido-basicity of the support affected the total oxidation of VOCs. [4,5] First, these materials were characterized, and then Pd particles were deposited onto these materials by using the wet impregnation method. The resultant catalytic systems were tested for their activity in propene and toluene oxidation.…”

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

“…Also, the low electronegativity of Cs + was accompanied by a decrease in the adsorption energy of VOCs over the catalyst and a better dispersion of Pd particles. [4,5] Temperature-programmed reduction (TPR) profiles showed that the quantity of reduced PdO particles between 20 and 25 8C is directly related to the activity of the supports. For FAU zeolites, the quantity of reduced PdO particles increased from Pd/HFAU to Pd/NaFAU to Pd/CsFAU, which explains the high catalytic performance of Pd/CsFAU.…”

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

“…Pro-pene and toluene oxidation were thus selected as representatives of alkenes and aromatics, respectively. [4][5][6][7][8][9][10] These products are toxic and carcinogenic gases that induce the formation of ozone in the lower layers of the atmosphere (troposphere). They are mainly released by automobile exhaust pipes and industrial chimneys.…”

Section: Introductionmentioning

confidence: 99%

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Noble‐Metal‐Based Catalysts Supported on Zeolites and Macro‐Mesoporous Metal Oxide Supports for the Total Oxidation of Volatile Organic Compounds

et al. 2011

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The use of porous materials to eliminate volatile organic compounds (VOCs) has proven very effective towards achieving sustainability and environmental protection goals. The activity of zeolites and macro-mesoporous metal-oxide supports in the total oxidation of VOCs has been investigated, with and without noble-metal deposition, to develop highly active catalyst systems where the formation of by-products was minimal. The first catalysts employed were zeolites, which offered a good activity in the oxidation of VOCs, but were rapidly deactivated by coke deposition. The effects of the acido-basicity and ionic exchange of these zeolites showed that a higher basicity was related to exchanged ions with lower electronegativities, resulting in better catalytic performances in the elimination of VOCs. Following on from this work, noble metals were deposited onto macro-mesoporous metal-oxide supports to form mono and bimetallic catalysts. These were then tested in the oxidation of toluene to study their catalytic performance and their deactivation process. PdAu/TiO(2) and PdAu/TiO(2) -ZrO(2) 80/20 catalysts demonstrated the best activity and life span in the oxidation of toluene and propene and offered the lowest temperatures for a 50 % conversion of VOCs and the lowest coke content after catalytic testing. Different characterization techniques were employed to explain the changes occurring in catalyst structure during the oxidation of toluene and propene.

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“…[5,9] It has also been proven that, in this same process, zeolites tend to be more active than classical metal-oxide supports once the zeolites are impregnated with Pd.…”

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

Section: Zeolites For the Catalytic Oxidation Of Vocsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Noble‐Metal‐Based Catalysts Supported on Zeolites and Macro‐Mesoporous Metal Oxide Supports for the Total Oxidation of Volatile Organic Compounds

et al. 2011

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Zeolite‐Based Materials for Catalytic Oxidation of Volatile Organic Compounds

Qiu,

Lu,

Zeng

et al. 2024

ChemCatChem

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Owing to the structural stability, modifiable acidity and abundant pores/channels, zeolite‐based materials can act as catalysts or supports for effective conversion of volatile organic compounds (VOCs). In this review, a series of VOC oxidation processes catalyzed by zeolite‐based materials will be introduced, which include thermal oxidation, photocatalytic degradation, plasma‐driven removal, catalytic ozonation, microwave‐assisted degradation and hybrid systems, where the specific roles, modification strategies and structure‐performance relationships of zeolites are discussed in depth. The following topics will also be covered, including the catalytic mechanisms of VOC oxidation, types of zeolite‐based materials in VOC catalytic oxidation, operation parameters in the processes, and reactor designs for efficiency optimization and cost control.

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Effect of noble metal deposition in zeolitic structures on their adsorption capacities

Cited by 2 publications

References 9 publications

Noble‐Metal‐Based Catalysts Supported on Zeolites and Macro‐Mesoporous Metal Oxide Supports for the Total Oxidation of Volatile Organic Compounds

Noble‐Metal‐Based Catalysts Supported on Zeolites and Macro‐Mesoporous Metal Oxide Supports for the Total Oxidation of Volatile Organic Compounds

Zeolite‐Based Materials for Catalytic Oxidation of Volatile Organic Compounds

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