Toluene adsorption characteristics of zeolite depending on temperature and relative humidity

Cho, Min-Whee; Ahn, Dongchan; Yim, Bongbeen; Ohlen, Ken; Lee, Seung-Kil; Lee, Hyun-Jae; Yoo, Yoonjong

doi:10.15250/joie.2016.15.4.368

Cited by 2 publications

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“…Toluene gas with high moisture contents may have passed through the WAH/VAH-CH, and the moisture may have been primarily adsorbed by the WAH, thereby lowering the moisture content of the gas. Thus, the selectivity of VAH for toluene was improved, and the toluene adsorption amount by WAH/VAH-CH was above 12.5 mg/g more than VAH-SH [21]. Fig.…”

Section: Comparison Of the Sh And Ch Adsorbentsmentioning

confidence: 80%

“…The moisture present in mixtures with high humidity may have diffused into the pores of VAH, thereby decreasing its toluene adsorption capacity. Therefore, under conditions above 49.1 gH 2 O/kg-dry air (60% RH) absolute humidity, toluene adsorption performance of the adsorbent would be decreased [21].…”

Section: Toluene Adsorption Amountmentioning

confidence: 99%

“…The water adsorption amount by VAH-SH was higher than that by WAH/VAH-CH. This is because in the case of VAH-SH, desorption energy was used to desorb water besides toluene, thereby increasing desorption time [21].…”

Section: Comparison Of the Sh And Ch Adsorbentsmentioning

confidence: 99%

“…However, the decrease in the adsorption efficiency of the DR was smaller than that of the SR. Thus, the high toluene removal rate of the DR system may be attributable to the adsorption of water by the WAH present at the inlet of the DR system [21].…”

Section: Evaluation Of Water and Toluene Adsorption Using Thementioning

confidence: 99%

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Excellent toluene removal via adsorption by honeycomb adsorbents under high temperature and humidity conditions

Cho¹,

Kim²,

Jeong³

et al. 2019

Environmental Engineering Research

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Removal through adsorption is the most widely used and effective treatment method for volatile organic compounds (VOCs) in exhaust gases. However, at high temperatures and humidity, adsorption is competitive due to the presence of moisture and unsmooth physical adsorption thereby deteriorating adsorption performance. Therefore, water adsorption honeycomb (WAH) and VOCs adsorption honeycomb (VAH) were prepared to improve VOCs adsorption at high temperatures and humidity. Adsorbed toluene amounts on single honeycomb (SH), containing only VAH, and combined honeycomb (CH), containing WAH and VAH, were determined. Further, the toluene adsorption rates of honeycomb adsorbents mounted on rotary systems, VAH-single rotor (SR) and WAH/VAH-dual rotor (DR) were determined. Toluene adsorption by WAH/VAH-CH (inlet temperature: 40-50 o C; absolute humidity: 28-83 gH2O/kg-dry air) was 1.6 times that by VAH-SH, and the water adsorption efficiency of WAH/VAH-CH was 1.7 times that of VAH-SH. The adsorption/removal efficiency of the WAH/VAH-DR (inlet temperature: 45 o C; absolute humidity: 37.5 gH2O/kg-dry air) was 3% higher than that of VAH-SR. This indicates that the WAH at the rotor inlet selectively removed water, thereby improving the adsorption efficiency of the VAH at the outlet.

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Section: Comparison Of the Sh And Ch Adsorbentsmentioning

confidence: 80%

Section: Toluene Adsorption Amountmentioning

confidence: 99%

Section: Comparison Of the Sh And Ch Adsorbentsmentioning

confidence: 99%

Section: Evaluation Of Water and Toluene Adsorption Using Thementioning

confidence: 99%

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