Comparison of adsorption characteristics for VOCs on activated carbon and oxidized activated carbon

You, J. H.; Chiang, Hung‐Lung; Chiang, Pen‐Chi

doi:10.1002/ep.670130115

Cited by 24 publications

(15 citation statements)

References 10 publications

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“…Jointly with a slight increase of the adsorption capacity, it is possible to appreciate a tremendous increase of the mass transfer coefficient (K), doubling for the sample under the electric field. The amounts of MEK adsorbate at the equilibrium, normalized on weight, are comparable with the one found in the literature [49,50] if it is considered that the activated carbon amount in the present composite is approximately 44%. Fitted values of the Equation (7), relatively to the batch adsorption tests, are reported in Table 5.…”

Section: Enhanced Removal Of Vocsupporting

confidence: 87%

Electroadsorptive Removal of Gaseous Pollutants

2019

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Adsorption is a consequence of surface energy distribution, and the existence of electrostatic bonding suggests that the presence of an external electric field may affect adsorbate/adsorbent interactions. Nevertheless, this aspect has been poorly studied in the literature, except under non-thermal plasma or corona discharge conditions. After having demonstrated in our previous work that the adsorption kinetics of gaseous organic compounds can be enhanced by the presence of an external applied electric field, in this study, we focus on the influence of the electric field on adsorbent and adsorptive interactions. By using a commercially available activated carbon cloth, in addition to increasing the adsorbent mass transfer coefficient by virtue of the increasing intensity of the applied electric field, the results suggest that adsorbent morphology is only influenced by the formation of new surface functional groups. Moreover, enhanced adsorption kinetics and capacity may result from the electrohydrodynamic force induced by the movement of charged and neutral particles towards the adsorbent, as confirmed by the reversibility of the process. Such enhancement results in a negligible increase, of about 3%, in adsorption capacity (i.e., from 91 mmol m−2 Pa−1 for only adsorption to 94 mmol m−2 Pa−1 in the presence of the applied electric field), but also in a dramatic doubling of adsorption kinetics (i.e., from 0.09 min−1 for only adsorption to 0.19 min−1 in the presence of the applied electric field). In reality, the application of an electric field to an activated carbon cloth leads to faster adsorption kinetics, without substantially altering its adsorption capacity.

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Section: Enhanced Removal Of Vocsupporting

confidence: 87%

Electroadsorptive Removal of Gaseous Pollutants

2019

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“…This negative effect for gas phase adsorption of aromatics has been previously observed in the case of benzene [28,29]. In these studies [28] the authors concluded that the CO 2 -type groups are detrimental for the benzene adsorption whereas the CO-type groups favor it.…”

Section: Phenanthrene Adsorption Isotherm Analysismentioning

confidence: 76%

“…Although the research on the influence of surface chemistry in aromatic compounds in aqueous solution is very extensive [19,22,26], studies on gas phase are very scarce and limited to the adsorption of benzene vapors [28,29]. Consequently, the main objective of the present work is to explore the role of activated carbon surface chemistry in the adsorption of Phe vapors, one of the most abundant polyaromatic emitted in energy generation systems.…”

Section: Introductionmentioning

confidence: 99%

Role of the activated carbon surface chemistry in the adsorption of phenanthrene

Garcı́a

Murillo

Cazorla‐Amorós

et al. 2004

Carbon

114

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“…Gasification occurs and CO 2 are produced when O 3 oxidizes the activated carbon surface. CO 2 exits the surface and creates new pores [36]. The consumption and the change of the carbon surface structure may influence the performance of VOC-ozone reaction and the regeneration of the media and hence activated carbon was not used in this study.…”

Section: Introductionmentioning

confidence: 99%