Complete benzene oxidation over Pt-Pd bimetal catalyst supported on γ-alumina: influence of Pt-Pd ratio on the catalytic activity

Kim, Hyoung Sik; Kim, Tae Won; Koh, HyeJung; Lee, Seo Ho; Min, Byoung Ryul

doi:10.1016/j.apcata.2004.02.027

Cited by 130 publications

(50 citation statements)

References 19 publications

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“…Table 1 presents the reaction temperatures of T 10 , T 50 and T 90 for benzene conversion over these catalysts. Pd/ZM-5% possesses the highest activity with 90% of benzene conversion at 209 • C. The temperature reduction is more than 80 • C compared with Pd/MCM-48 that causes 90% of benzene conversion at 292 • C. In comparison with other active catalysts reported elsewhere [52][53][54][55], our catalysts perform better in deep catalytic oxidation of benzene, as shown in Table 4. According to T 50 (Table 1), the activity order of synthesized catalysts is as follows: Pd/ZM-5% (200…”

Section: Catalytic Activitymentioning

confidence: 66%

Synthesis and characterization of Pd/ZSM-5/MCM-48 biporous catalysts with superior activity for benzene oxidation

Cheng

et al. 2010

Applied Catalysis A: General

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a b s t r a c t ZSM-5/MCM-48 composite materials with different acidities and enhanced thermal stability have been synthesized via a simple and reliable in situ overgrowth method. The as-prepared biporous materials and the Pd-impregnated catalysts were systematically investigated by various techniques, including XRD, ICP-OES, N 2 adsorption/desorption, H 2 chemisorption, SEM, TEM/HRTEM, FT-IR, 27 Al MAS NMR, NH 3 -TPD, H 2 -TPR and XPS. The characterization results reveal that all composite catalysts exhibit high surface area, large pore volume and long pore diameter. The quantity of acid sites increases as the ZSM-5 additive amount increases, and Al atoms are in the tetrahedral coordination positions in composite materials. The activity tests demonstrate that all the Pd-loaded catalysts are active in the total elimination of benzene, while the catalytic activity values of Pd-loaded ZSM-5/MCM-48 composite catalysts are much higher than those of Pd/ZSM-5 or Pd/MCM-48 alone. Both Pd 0 and Pd 2+ are responsible for the oxidation reaction, and the catalytic activities are primarily related to the support acidity and the Pd dispersion. In addition, the stability of the composite catalysts also improves with an appropriate amount of ZSM-5 additives in MCM-48. This research shows that the novel Pd-loaded composite catalysts are promising materials in the elimination of VOCs.

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Section: Catalytic Activitymentioning

confidence: 66%

Synthesis and characterization of Pd/ZSM-5/MCM-48 biporous catalysts with superior activity for benzene oxidation

Cheng

et al. 2010

Applied Catalysis A: General

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“…The supports used are metal oxides, activated carbon and zeolite, etc. In the case of metal oxide supported Pt and Pd catalyst, the commonly used supports are Al 2 O 3 , ZrO 2 , CeO 2 , SiO 2 and TiO 2 and so on [3,[8][9][10]. With the metal oxide supported Pt and Pd catalysts, most of the reaction temperatures for 100% conversion of BTX were above 200 8C.…”

Section: Introductionmentioning

confidence: 99%

Complete oxidation of o-xylene over Pd/Al2O3 catalyst at low temperature

2008

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“…It is expected with copper exchange treatment that [Cu(OH)] + as well as Cu(OH)2 species in solution are transformed into CuO, after the zeolite activation treatment, which is present within zeolite channels along with the exchanged Cu 2+ ions [20,21]. (1) to (3). For the calculation, three assumptions are made:…”

Section: Redox Propertiesmentioning

confidence: 99%

“…Absorption and condensation are very useful in recovering expensive solvents and operating at a large capacity, but they require high capital and operating costs. Adsorption is a reliable alternative to eliminate organic compounds from industrial waste gases because of the flexibility of the system, low energy requirements and low operation costs [3]. The second group includes thermal and catalytic oxidation.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Toluene over NaX Zeolite Exchanged with Cu2+

et al. 2015

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Toluene is a major air pollutant emitted from painting and metal coating processes and might have some health effects. Adsorption and catalytic complete oxidation are promising ways to retain or convert toluene into harmless products. The present work aims to develop a bifunctional material which can be used as an adsorbent and catalyst for low-temperature toluene removal. Copper zeolites were obtained by exchanging the sodium in the parent NaX zeolite with copper from aqueous solutions of Cu(NO3)2•2.5H2O. Several characterization techniques, H2-TPR, XPS, XRD and N2 physisorption, were used in order to evaluate the redox, surface, structural and textural properties of the materials, respectively. The various materials were tested in adsorption and catalytic processes. The sample with low copper content (1 wt. %) exhibited promising features in terms of toluene adsorption capacity and total oxidation. The results can be correlated to the presence of micropores and well-dispersed CuO species. OPEN ACCESSCatalysts 2015, 5 1480

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Complete benzene oxidation over Pt-Pd bimetal catalyst supported on γ-alumina: influence of Pt-Pd ratio on the catalytic activity

Cited by 130 publications

References 19 publications

Synthesis and characterization of Pd/ZSM-5/MCM-48 biporous catalysts with superior activity for benzene oxidation

Synthesis and characterization of Pd/ZSM-5/MCM-48 biporous catalysts with superior activity for benzene oxidation

Complete oxidation of o-xylene over Pd/Al2O3 catalyst at low temperature

Removal of Toluene over NaX Zeolite Exchanged with Cu2+

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