Capture of Organic Vapors Using Adsorption and Electrothermal Regeneration

Sullivan, Patrick; Rood, Mark J.; Dombrowski, Katherine; Hay, K. James

doi:10.1061/(asce)0733-9372(2004)130:3(258)

Cited by 44 publications

(37 citation statements)

References 21 publications

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“…0:7Þ for VOC vapour adsorption in electrothermal swing adsorption systems. The maximum LUB value for adsorption on granulated activated carbon can reach 0.5 (Sullivan et al 2004). Table 2 reveals that in adsorption cycles with superficial gas velocity below 0.17 m/s LUB values are generally lower.…”

Section: Breakthrough Curve Test Resultsmentioning

confidence: 96%

“…LUB value determines how many per cent of adsorption capacity is not utilized at 5 % breakthrough time due to the length of the adsorption zone within the fixed-bed (Sullivan et al 2004):…”

Section: Breakthrough Curve Test Resultsmentioning

confidence: 99%

“…Breakthrough time denoted t 5 % is defined as time when outlet concentration was 5 % of inlet concentration. TPR characterises the slope of the breakthrough curve and is defined as (Sullivan et al 2004):…”

Section: Breakthrough Curve Test Resultsmentioning

confidence: 99%

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Adsorption characteristics of propan-2-ol vapours on activated carbon Sorbonorit 4 in electrothermal temperature swing adsorption process

Downarowicz

2015

Adsorption

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Adsorption characteristics of propan-2-ol on Sorbonorit 4 activated carbon were determined using the breakthrough curve tests in a cyclic electrothermal temperature swing adsorption process. Maximum adsorption capacity, breakthrough time, throughput ratio and length of unused bed were also evaluated. As a result of multiple regeneration, the adsorption capacity of Sorbonorit 4 increased. Electrothermally-induced changes in the internal structure of Sorbonorit 4 and in the chemical composition of its surface were assessed based on adsorption equilibrium measurements by the gravimetric method and X-ray photoelectron spectroscopy (XPS). Three samples of virgin, direct resistively heated and electrothermally regenerated Sorbonorit 4 were used. The structural characteristics of activated carbon show that that fresh and direct resistive heated Sorbonorit 4 has a bimodal structure. Regenerated activated carbon contains one fraction of micropores. XPS analysis revealed that the same hydroxyl, carbonyl and carboxyl groups were found on the surface of all Sorbonorit 4 samples, albeit in different volume ratios. Regenerated Sorbonorit 4 has higher adsorption capacity than pure adsorbent while resistively heated Sorbonorit 4 displays lower adsorption efficiency.

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Section: Breakthrough Curve Test Resultsmentioning

confidence: 96%

“…LUB value determines how many per cent of adsorption capacity is not utilized at 5 % breakthrough time due to the length of the adsorption zone within the fixed-bed (Sullivan et al 2004):…”

Section: Breakthrough Curve Test Resultsmentioning

confidence: 99%

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Adsorption characteristics of propan-2-ol vapours on activated carbon Sorbonorit 4 in electrothermal temperature swing adsorption process

Downarowicz

2015

Adsorption

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“…Rapid ED of ACFC, with in-vessel condensation of the adsorbate, was demonstrated at the bench-scale with an automated dual-vessel system (4,10). The system was developed to remove methyl ethyl ketone (MEK) from air, which is difficult to accomplish with traditional granular activated carbon (GAC) because of the occurrence of bed fires (11,12).…”

Section: Introductionmentioning

confidence: 99%

“…The system was developed to remove methyl ethyl ketone (MEK) from air, which is difficult to accomplish with traditional granular activated carbon (GAC) because of the occurrence of bed fires (11,12). This was the first successful system to continuously capture dilute organic vapors from air and recover liquid adsorbate using electrothermal-swing adsorption (ESA) in a fixed-bed system without a separate condensation unit (4).…”

Section: Introductionmentioning

confidence: 99%

Activated Carbon Fiber Cloth Electrothermal Swing Adsorption System

Sullivan

Rood

Grévillot³

et al. 2004

Environ. Sci. Technol.

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The Dublic reDortinp burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, ^*|5^^*'™?* gatheringand maintairfng thedata needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate|_or any^e; a_spe«jrfJhis^tectonrt information, including suggestions for reducii ?n?ÄlnTl™ "^Jefferson Davfc Highway! Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be sublet to anpenalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) ARMT0052 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)University of Illinois SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air Force Capture and recovery of hazardous air pollutants (HAPs) and volatile organic compounds (VOCs) from gas streams using physical adsorption onto activated carbon fiber cloth (ACFC) is demonstrated on the bench-scale. This system is regenerated electrothermally, by passing an electric current directly through the ACFC. The adsorbate desorbs from the ACFC, rapidly condenses on the inside walls of the adsorber, and then drains from the adsorber as a pure liquid. Rapid electrothermal desorption exhibits such unique characteristics as extremely low purge gas flow rate, rapid rate of ADFC heating, rapid mass transfer kinetics inherent to ACFC, and in-vessel condensation. An existing system was scaled up 500%, and the new system was modeled using material and energy balances.... These results allow the modeling of electrothermal desorption of organic vapors from gas streams with in-vessel condensation to optimize operating conditions of the system during regeneration of the adsorbent. Environ. Sei. Technol. 2004, 38, 4865-4877 Capture and recovery of hazardous air pollutants (HAPs) and volatile organic compounds (VOCs) from gas streams using physical adsorption onto activated carbon fiber cloth (ACFC) is demonstrated on the bench-scale. This system is regenerated electrothermally, by passing an electric current directly through the ACFC. The adsorbate desorbs from the ACFC, rapidly condenses on the inside walls of the adsorber, and then drains from the adsorber as a pure liquid. Rapid electrothermal desorption exhibits such unique characteristics as extremely low purge gas flow rate, rapid rate of ACFC heating, rapid mass transfer kinetics inherent to ACFC, and in-vessel condensation. An existing system was scaled up 500%, and the new system was modeled using material and energy balances. Adsorption isotherms using methyl ethyl ketone (MEK) and ACFC were obtained while electricity passed through the ACFC and at temperatures above MEK's boiling point. These isotherms agreed within 7% to Dubinin-Radushkevich modeled isotherms that were extrapolated from independently determined gravimetric measurements obtained at l...

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Manufacture and Physical Characterization of Wood-Derived Activated Carbon from South Texas Mesquite for Environmental Applications

Sakaray

Ramirez

2013

Environmental Sustainability Issues in the South Texas–Mexico Border Region

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Activated carbons are widely used to remove contaminants from waste streams. Desirable properties of activated carbon include large surface area, porosity, high degree of selectivity between contaminant and carrier medium, rapid transport of the contaminant from bulk stream to the internal porous structure of the adsorbent, high adsorption capacity at low contaminant concentration, and available commercially at competitive prices. This research focuses on the production and physical characterization of carbonaceous adsorbents from low cost mesquite woodchips available in the South Texas region. Activated carbons were prepared from mesquite woodchips in a bench-scale tubular reactor. Steam and a potassium carbonate solution were used for the physical and chemical activation methods to manufacture activated carbons. The activated carbons were then characterized in terms of their physical and adsorption capacities for nitrogen at 77 K and methanol and water vapor at ambient temperature. The surface areas of the samples were determined using the N 2 -Brunauer-Emmett-Teller method. The percent yield, bulk density, pore size distribution, average pore width, and total pore volume were evaluated. Equilibrium adsorption capacities of methanol and water vapor were determined by a gravimetric method. Experimental adsorption capacity data were in agreement with the Freundlich and Langmuir adsorption models.

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Capture of Organic Vapors Using Adsorption and Electrothermal Regeneration

Cited by 44 publications

References 21 publications

Adsorption characteristics of propan-2-ol vapours on activated carbon Sorbonorit 4 in electrothermal temperature swing adsorption process

Adsorption characteristics of propan-2-ol vapours on activated carbon Sorbonorit 4 in electrothermal temperature swing adsorption process

Activated Carbon Fiber Cloth Electrothermal Swing Adsorption System

Manufacture and Physical Characterization of Wood-Derived Activated Carbon from South Texas Mesquite for Environmental Applications

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