Design of dual functional adsorbent/catalyst system for the control of VOC’s by using metal-loaded hydrophobic Y-zeolites

Baek, Seungjun; Kim, Jeong‐Rang; Ihm, Son‐Ki

doi:10.1016/j.cattod.2004.06.107

Cited by 135 publications

(86 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A main peak (100-200 • C) in TPR profile was observed over all silver catalysts, and a broad reduction peak higher than 200 • C was also found for all samples except for Ag/TiO 2 . The peak at around 100 • C in our experiments should be assigned as the well-dispersed silver oxides (below XRD detection limit) within the pore or on the surface of sieves [26,39]. And the reduction peak temperature for dispersed silver oxides was related with the size of these species [36] and the similar phenomena was also observed, the reduction temperature moved to lower temperature with the increase of the silver loading.…”

Section: Catalysts Characterizationmentioning

confidence: 57%

“…Moreover, the porous structure allows the VOC molecules to reach the inner active sites to be readily oxidized. It is well known that mesoporous materials, such as MCM-41 and SBA-15, have very high surface areas and uniform pore diameter (2.0-10.0 nm), which are good for uniformly loading the catalytic active component and consequent catalytic reactions [26,27,30,31]. However, the systematic studies on the effect of the different supports on the nature of active sites and catalytic activity have seldom been reported on the Ag based catalysts for HCHO oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the support is the vital factor which affects the formation, the distribution and the dispersion of active species in catalytic oxidation and thus many Refs. [25][26][27] have been paid to develop catalytic materials and improve their catalytic performance. In review on the support role on the HCHO oxidation, it is suggested that different support results in different catalytic active phases which are related to different 0920-5861/$ -see front matter © 2011 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde

et al. 2011

View full text Add to dashboard Cite

Section: Catalysts Characterizationmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde

et al. 2011

View full text Add to dashboard Cite

“…Combining the adsorption and oxidation steps into one unit would provide an energy-and cost-effective technique for the removal of low-concentration VOCs. Previous studies compared the removal of dilute toluene (Baek et al, 2004) and cyclohexene (Kullavanijaya et al, 2002) using adsorption-catalysis systems of Pd/CeO 2 /Al 2 O 3 and Ag/HY, respectively. The results showed that desorption occurred below the working temperature of the catalytic reaction, leading the authors to conclude that the adsorbent and catalyst could not be operated together.…”

Section: Introductionmentioning

confidence: 99%

In situ adsorption-catalysis system for the removal of o-xylene over an activated carbon supported Pd catalyst

Huang

Zhang

2009

Journal of Environmental Sciences

View full text Add to dashboard Cite

An activated carbon (AC) supported Pd catalyst was used to develop a highly efficient in situ adsorption-catalysis system for the removal of low concentrations of o-xylene. In this study, three kinds of Pd/AC catalysts were prepared and tested to investigate the synergistic efficiency between adsorption and catalysis for o-xylene removal. The Pd/AC catalyst was first used as an adsorbent to concentrate dilute o-xylene at low temperature. After saturated adsorption, the adsorbed o-xylene was oxidized to CO 2 and H 2 O by raising the temperature of the catalyst bed. The results showed that more than 99% of the adsorbed o-xylene was completely oxidized to CO 2 over a 5% Pd/AC catalyst at 140°C. Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), temperatureprogrammed desorption (TPD), and temperature-programmed oxidation (TPO) were applied to investigate the physical properties of o-xylene adsorption-desorption and the in situ adsorption-catalysis activity of the AC support and Pd/AC catalyst. A synergistic relationship between the AC support and the active Pd species for the removal of low concentrations of o-xylene was established.

show abstract

“…Ag-NPs are also known to have antimicrobial and antifungal properties and have been widely applied in wound-care products and medical devices, including dental work and catheters [9]. Some researchers have shown other potential applications of Ag-NPs, as adsorbent [10][11][12] or as dual functional adsorbent-catalyst [13].…”

Section: B Introductionmentioning

confidence: 99%

The Synthesis of Alginate-Capped Silver Nanoparticles under Microwave Irradiation

2015

View full text Add to dashboard Cite

Abstract. Synthesis of silver nanoparticles (Ag-NP) was successfully performed within a few minutes by microwave irradiation of the precursor salt (AgNO 3 ) and alginate mixed solution in one pot. Herein, alginate molecules acted as both a reducing and stabilizing agent for the preparation of the silver nanoparticles. The obtained nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, particle size analysis (PSA), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The pH and concentration ratio of the alginate/metal precursor salt greatly influenced the particle size and its distribution of Ag-NP. The higher the pH the higher the nucleation rate and the larger the electrostatic stabilization, while both of them were responsible for producing a smaller particle size and a narrower size distribution. A higher concentration ratio also yielded a smaller particle size and a narrower size distribution, but above the optimum ratio, the trend was conversely changed due to the reducing capability of the alginate, which was dominant above the optimum ratio, thus creating a high density of nuclei, allowing aggregation to occur. A lower ratio not only led to a higher tendency to produce larger particles, but also a higher probability of anisotropic particle shape formation due to the lack of reducing capability of the alginates.

show abstract

Design of dual functional adsorbent/catalyst system for the control of VOC’s by using metal-loaded hydrophobic Y-zeolites

Cited by 135 publications

References 17 publications

Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde

Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde

In situ adsorption-catalysis system for the removal of o-xylene over an activated carbon supported Pd catalyst

The Synthesis of Alginate-Capped Silver Nanoparticles under Microwave Irradiation

Contact Info

Product

Resources

About