Combined air treatment: Effect of composition of fibrous filters on toluene adsorption and particle filtration efficiency

Rochereau, Agnès; Benesse, Marc; Coq, Laurence Le; Mauret, Évelyne; Albert, Subrenat; Pierre, Le Cloirec

doi:10.1016/j.cherd.2008.02.012

Cited by 11 publications

(6 citation statements)

References 12 publications

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“…The adsorption of gaseous contaminants onto solid adsorbents to effect removal from indoor air remains the most prevalent technology for air purification. Activated carbon (AC) has exceptionally high specific surface area and large adsorption capacity 7 making it highly effective and therefore common for sorption filtration applications 8,9 . Despite these positive characteristics, AC filters are limited to high gas contaminant concentration and some specific compounds 10‐14 …”

Section: Introductionmentioning

confidence: 99%

“…Activated carbon (AC) has exceptionally high specific surface area and large adsorption capacity 7 making it highly effective and therefore common for sorption filtration applications. 8,9 Despite these positive characteristics, AC filters are limited to high gas contaminant concentration and some specific compounds. [10][11][12][13][14] To enhance adsorption performance of AC filters for VOCs and CO, coatings of metal nanoparticles and chitosan have been explored by several researchers.…”

Section: Introductionmentioning

confidence: 99%

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Performance of coated activated carbon filters used in the building environment

Tseng

Shiue

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND This study focuses on the removal of gaseous pollutants by nanogold–silver (Au–Ag)‐, nanosilver‐ and chitosan‐coated activated carbon filters. Target gaseous pollutants included formaldehyde (HCHO), acetone (CH3COCH3), carbon monoxide (CO) and bioaerosol. RESULTS Laboratory experimental results show that chitosan‐coated filters are 16.33% more efficient than uncoated carbon filters when challenged with HCHO, but the same gain is not observed when challenged with CH3COCH3 and CO. When challenged with HCHO and CO, the removal efficiency of Au–Ag‐coated carbon was found to be 20% and 7.11% higher than that of uncoated carbon, respectively. A parking lot field study to determine the efficiency of Au–Ag‐coated carbon when challenged with CO and bacteria concluded that the removal efficiency of Au–Ag‐coated carbon was 7.48% and 19.57% higher, respectively, than that of uncoated carbon. The removal efficiencies for bacteria and fungi were increased 35% and 17.1% when the carbon filter was coated with chitosan, respectively. At a kindergarten, the removal efficiency for HCHO was assessed, which was increased 9.02% and 42% when the carbon filter was coated with Au–Ag and chitosan, respectively. CONCLUSIONS Laboratory experimental data were evaluated using pseudo‐first‐order and pseudo‐second‐order kinetic equations. Pseudo‐second‐order kinetics were found to be applicable to discuss the adsorption kinetics. The overall rate of the Au–Ag‐, nanosilver‐ and chitosan‐coated activated carbon filter adsorption process appears to be influenced by more than one step of the intraparticle diffusion model. © 2022 Society of Chemical Industry (SCI).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of coated activated carbon filters used in the building environment

Tseng

Shiue

et al. 2022

J of Chemical Tech & Biotech

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“…The subject matter of this work is to give a better understanding of salt particle loading performance of different fibrous filters, along with the evolution of both pressure drop and particle removal efficiency during the particle loading process . Since filter design mainly contains two aspects, filter media design and filter packaging configuration design, it is highly necessary for us to evaluate the effects of both two aspects on particle loading performance.…”

Section: Introductionmentioning

confidence: 99%

Loading of fibrous filter media and newly designed filter configurations by salt particles: An experimental study

2016

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in Wiley Online Library (wileyonlinelibrary.com)Various fibrous filter media, including surface filter media, depth filter media, woven and nonwoven filter media, were tested and particle loading capacity was calculated using bench-scale setup via a new estimation approach which was proposed and experimentally verified with Novick-Kozeny model. Multi-element structured arrays (MESAs) developed by our research group were evaluated as well for particle loading capacity and filter lifetime on 24 00 3 24 00 full scale test rig (based on ASHRAE 52.2 Standard). Effects of varying filter media type, filter depth, pleat count and MESAs' element count on salt particle loading performance were experimentally investigated. The experimental studies showed that nonwoven activated carbon fiber filter media have allowed significantly higher salt particle loading capacity and longer useful lifetime compared to woven or nanofiber entrapped media. Furthermore, MESAs were able to significantly enhance loading capacity for salt particles and useful lifetime due to higher filtration area and lower filtration velocity.

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“…The applications of activated carbon can be found in a large number of industries, water filters, respirators, solvent recovery systems, etc. [3,4]. Activated carbon can be used for filtering most organic pollutants and solvents from air through the adsorption process [5].…”

Section: Introductionmentioning

confidence: 99%