Decomposition of low-concentration gas-phase toluene using plasma-driven photocatalyst reactor

Sun, Rubao; Zhuge, Xi; Chao, Fuhuan; Zhang, Wei; Zhang, Hua‐Shan; Yang, Dengfeng

doi:10.1016/j.atmosenv.2007.04.041

Cited by 41 publications

(14 citation statements)

References 14 publications

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“…Many techniques have been developed to remove BTX from polluted air, including photocatalytic decomposition (Cao et al, 2000;Sun et al, 2007;Xie et al, 2004). However, the intermediates produced during photocatalytic oxidation occupy the active sites of the catalyst surface, thereby deactivating the catalyst.…”

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

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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.

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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

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“…Studies using a combination of these technologies have been performed [16,43,44], and the results obtained by coupling these techniques show an improvement in elimination and a significant decrease in the production of by-products. The explanations of this synergistic effect have been attributed to diverse causes.…”

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confidence: 99%

Isovaleraldehyde degradation using UV photocatalytic and dielectric barrier discharge reactors, and their combinations

Palau¹,

Assadi

Penya-Roja³

et al. 2015

Journal of Photochemistry and Photobiology A: Chemistry

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“…A previous study using TiO 2 to coat an activated carbon filter found that the NO removal increased to 66%, and that benzene, toluene, ethyl benzene, and xylene (BTEX) were removed by more than 60% 11 . In a later study, toluene removal efficiency was increased from 32% to 78% when using a combination of PCO and ACF, and the efficiency was further improved to over 80% when the voltage of the plasma-driven photocatalysis system was increased from 8 to 10 kV 9 . Longer residence time in the reaction zone could cause additional adsorption and desorption processes, resulting in greater removal efficiency of VOCs 9 .…”

Section: Introductionmentioning

confidence: 99%

“…For example, PCO in combination with filtration using an activated carbon fibre (ACF), with a plasma-driven photocatalysis system and ACF, with ozone generators, and with dielectric barrier discharge have all been found to enhance indoor air purification [7][8][9][10] . A previous study using TiO 2 to coat an activated carbon filter found that the NO removal increased to 66%, and that benzene, toluene, ethyl benzene, and xylene (BTEX) were removed by more than 60% 11 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of a TiO2-coated photocatalytic air filter for use with an electrostatic air filter pack for xylene removal

Limmongkon¹,

Johns²,

Charerntanyarak³

2013

ScienceAsia

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This study evaluated surface morphology, mechanical stability, and the effectiveness for xylene removal of coated fibre glass filters and coated high-efficiency particulate air (HEPA) filters for use with an electrostatic air filter pack (ESF pack). Different surface pretreatment methods, two TiO2 coating suspensions with different amounts of TiO2 and additive substances, varied baking temperatures, and various combinations between an ESF pack and a coated air filter were investigated. This investigation found that washing the substrates with 0.08 M sodium dodecyl sulphate and 0.01 M sodium fluoride before coating with 5% TiO2 suspension and then baking at 50°C for 30 min after coating could yield the highest loadings of 285 g/m 2 for the fibre glass filters and 182 g/m 2 for the HEPA filters. Examination of these filters revealed that the TiO2 particles were agglomerated and stuck to the fibres as well, resulting in less loading loss. The highest removal efficiency of xylene (in 400-800 ppb) ranged from 41-49% when using a combination of one HEPA filter coated with 5% TiO2 suspension together with four layers of ESF filters at an air flow rate of 10 m 3 /min and 45 ± 5% RH. The suitable preparation of photocatalytic air filters is of great importance for their practical use, ensuring the stability of the coating and resulting in a product that is safe for human health and friendly to the environment.

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Decomposition of low-concentration gas-phase toluene using plasma-driven photocatalyst reactor

Cited by 41 publications

References 14 publications

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

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

Isovaleraldehyde degradation using UV photocatalytic and dielectric barrier discharge reactors, and their combinations

Preparation of a TiO2-coated photocatalytic air filter for use with an electrostatic air filter pack for xylene removal

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