Influence of the exchanged cation in Pd/BEA and Pd/FAU zeolites for catalytic oxidation of VOCs

Tidahy, Haingomalala Lucette; Siffert, Stéphane; Lamonier, Jean‐François; Cousin, Renaud; Zhilinskaya, E. A.; Aboukaı̈s, Antoine; Su, Bao‐Lian; Canet, Xavier; Weireld, Guy De; Frère, Marc; Giraudon, Jean‐Marc; Leclercq, G.

doi:10.1016/j.apcatb.2006.02.027

Cited by 121 publications

(90 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in a good agreement with the H 2 -TPR and XPS results. During the active phase of VOC oxidation over a Pdsupported catalyst, Pd 2+ has been proposed to catalyze the hydrocarbon oxidation, and Pd 0 to promote the catalytic activity by maintaining a Pd 2+ -Pd 0 cycle during dissociation of VOCs, thus accelerating the reaction rate [33][34][35]. In addition, the catalytic oxidation of VOCs usually involves the participation of surface lattice oxygen species via the Mars-van Krevelen model [36].…”

Section: Catalytic Behaviormentioning

confidence: 99%

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Yue

Zhang

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Catalytic Behaviormentioning

confidence: 99%

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Yue

Zhang

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Among these, the reduction of volatile organic compounds (VOCs) is particularly important [2]. Particularly, benzene is a notorious hazardous VOC present in various industries, such as chemical, petrochemical, paint and coating, and steel manufacturers [1].…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…The attention was focused on the signal related to the presence of coke. Even in the 10-fold increased EPR spectra at´150˝C, in the magnetic field range of 320-335 mT, no signal at g = 2.003 due to carbon radicals [34] was detected for either of the spent samples, thereby excluding coke formation as a reason for the different catalytic properties.…”

Section: Sample Characterizationmentioning

confidence: 99%

Gold Catalysts on Y-Doped Ceria Supports for Complete Benzene Oxidation

et al. 2016

View full text Add to dashboard Cite

Gold (3 wt. %) catalysts on Y-doped (1, 2.5, 5 and 7.5 wt. % Y 2 O 3 ) ceria supports prepared by coprecipitation (CP) or impregnation (IM) were studied in complete benzene oxidation (CBO). A low-extent Y modification was chosen to avoid ordering of oxygen vacancies. The samples were characterized by XRD, TGA, XPS and TPR techniques. A positive role of air pretreatment at 350˝C as compared to 200˝C was established for all Y-containing catalysts and it was explained by cleaning the active sites from carbonates. The oxygen supply cannot be considered as a limiting step for benzene oxidation except for the high 7.5%-doped samples, as suggested by TGA and TPR data. On the basis of XPS results of fresh and used in CBO catalysts, the presence of cationic gold species does not seem important for high CBO activity. The gold catalyst on an IM support with 1% Y-doping exhibited the best performance. A 100% benzene conversion was achieved only over this catalyst and Au/ceria, while it was not reached even at 300˝C over all other studied catalysts. Gold and ceria particle agglomeration or coke formation should be excluded as a possible reason, and the most probable explanation could be associated with the importance of the benzene activation stage.

show abstract

Influence of the exchanged cation in Pd/BEA and Pd/FAU zeolites for catalytic oxidation of VOCs

Cited by 121 publications

References 25 publications

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

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

Gold Catalysts on Y-Doped Ceria Supports for Complete Benzene Oxidation

Contact Info

Product

Resources

About