Effect of VOC loading on the ozone removal efficiency of activated carbon filters

Metts, Tricia A.; Batterman, Stuart

doi:10.1016/j.chemosphere.2005.04.049

Cited by 52 publications

(41 citation statements)

References 26 publications

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“…The authors do not believe that O 3 breakthrough in air-sampling adsorbents has been reported previously. O 3 breakthrough and removal by activated carbon (AC) has been extensively examined 37 and is believed to be a chemisorption process involving reactions that form hydroxyl, carbonyl, -C-O-, and -COOH surface functional groups and that structurally change the carbon matrix, causing enlargement of existing pores and creation of new pores (secondary porosity). Some of these processes may not produce VOC artifacts if reactions result in gasification; for example, O 3 oxidizes the AC surface forming CO 2 .…”

Section: Discussionmentioning

confidence: 99%

“…The authors and others have used previously, for example, scrubbers containing crystalline potassium iodide (KI) that remove O 3 and that do not appear to remove significant amounts of target VOCs. 37 41 they have limited lifetimes, they impose a pressure drop in active sampling, they may preclude passive sampling, and additional artifacts may be formed, for example, KI can form organic iodine species (that are, however, easily recognized as artifacts). 42 Finally, distributed sampling, often a good way to test data quality, may not reliably detect certain O 3 -adsorbent artifacts, for example, phenyl-substituted carbonyls.…”

Section: Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Ozone Artifacts and Carbonyl Measurements Using Tenax GR, Tenax TA, Carbopack B, and Carbopack X Adsorbents

Lee

Batterman

Jia

et al. 2006

Journal of the Air & Waste Management Association

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Four popular thermally desorbable adsorbents used for air sampling (Tenax TA, Tenax GR, Carbopack B, and Carbopack X) are examined for the potential to form artifacts with ozone (O 3 ) at environmental concentrations. The performance of these adsorbents for the ketone and aldehyde species identified as O 3 -adsorbent artifacts was also characterized, including recovery, linearity, and method detection limits (MDLs). Using gas chromatography/mass spectrometry, 13 different artifacts were identified and confirmed for both Tenax TA and Tenax GR, 9 for Carbopack B, but none for Carbopack X. Several O 3 artifacts not reported previously were identified, including: pentanal, 3-hexanone, 2-hexanone, hexanal, 3-heptanone, and heptanal with Tenax TA; pentanal, 3-hexanone, 2-hexanone, hexanal, and 3-heptanone on Tenax GR; and 1-octene and 1-nonene with Carbopack B. Levels of straight-chain aldehyde artifacts rapidly diminished after a few cycles of adsorbent conditioning/O 3 exposure, and concentrations could be predicted using a first-order model. Phenyl-substituted carbonyl artifacts (benzaldehyde and acetophenone) persisted on Tenax TA and GR even after 10 O 3 exposure-conditioning cycles. O 3 breakthrough through the adsorbent bed was most rapid in adsorbents that yielded the highest levels of artifacts. Overall, artifact composition and concentration are shown to depend on O 3 concentration and dose, conditioning method, and adsorbent type and age. Calibrations showed good linearity, and most compounds had reasonable recoveries, for example, 90 Ϯ 15% for Tenax TA, 97 Ϯ 23% for Tenax GR, 101 Ϯ 24% for Carbopack B, and 79 Ϯ 25% (91 Ϯ 9% for n-aldehydes) for Carbopack X. Benzeneacetaldehyde recovery was notably poorer (22-63% across the four adsorbents). MDLs for several compounds were relatively high, up to 5 ng. By accounting for both artifact formation and method performance, this work helps to identify which carbonyl compounds can be measured using thermally desorbable adsorbents and which may be prone to bias because of the formation of O 3 -adsorbent artifacts.

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Section: Discussionmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Ozone Artifacts and Carbonyl Measurements Using Tenax GR, Tenax TA, Carbopack B, and Carbopack X Adsorbents

Lee

Batterman

Jia

et al. 2006

Journal of the Air & Waste Management Association

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“…In the world, in order to treat toxic organic solvents, new adsorbents having large adsorption capacity have been used [30]. Some companies in the USA, the Netherlands, the UK, the Germany) such as NORIT, CANGOL, LABCONCO, and TROX have studied and released in international market a lot of the materials and the different environment treatment equipments [30][31][32][33].…”

Section: Physico-chemical Solutions For Air Pollution Reduction From mentioning

confidence: 99%

An integrated ecosystem incorporating renewable energy leading to pollution reduction for sustainable development of craft villages in rural area: a case study at sedge mats village in Mekong Delta, Vietnam

Tran

et al. 2016

Energ Sustain Soc

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Background: The sedge mats (dyeing, weaving processes, and small-scale livestock farm at the same place) craft villages in the Mekong Delta (Vietnam) are the most popular craft villages in Vietnam, especially in the Mekong Delta area. These craft villages generate typical emissions such as exhaust gas from burning fuel, wastewater from the sedge mats dyeing and weaving process, wastewater from livestock farm, and solid waste. Methods: In this study, an ecological system, so-called VICRAIZES (Vietnam Craft villages Agro-based Industrial Zero Emission System), has been developed with the purpose to decrease pollution and enhance resource efficiency at those craft villages. The proposed ecosystem focused on measures such as (1) biogas tank (using residue pieces of solid sedge mats from weaving processing) supplied gas for burning the dyeing tank, (2) wastewater treatment system combining three components: innovative septic tank having upward flow thin baffles, anaerobic filter compartment, and bio-pond, and (3) composting area. The system was applied for a number of household craft villages in Dong Thap Province, Vietnam. Results: The results of system demonstration show significant emission decreases: 93 % greenhouse gas (CO 2 and CH 4 ), 97 % BOD 5 in wastewater, around 30 kg/day biodegradable garbage are composted and used as organic fertilizers at the household needs (which increase family income of around 115 million VND/year), low initial investment and operating cost, simple operating procedure, etc., which are favorable and applicable at the low income sedge mats dyeing and weaving craft villages in the Mekong Delta area, Vietnam, and probably at other developing countries. Conclusions: The VICRAIZES system implementation shows remarkable benefits/advantages on environmental, economic, and technical aspects giving real chances for more comprehensive application at similar craft villages in Vietnam and possibly in other developing countries.

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“…AC as an indoor air filter in order to improve indoor air quality and to reduce the cancer risk and non-cancer risk health problem. There are many researchers' studies on increasing the pore development of palm shell activated carbon [8,13,14,[19][20][21][22]. The pore development on activated carbon can be increased by undergoing physical and chemical treatment.…”

Section: Introductionmentioning

confidence: 99%

Indoor Air Contaminant Adsorption By Palm Shell Activated Carbon Filter – A Proposed Study

et al. 2016

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Abstract. Indoor air contaminant is a public issue. High Volatile Organic Compound (VOC), Carbon monoxide (CO), Carbon dioxide (CO 2 ), and particulate matter is becoming main issue that needs to solve. Therefore, this study focus on improving indoor air quality by using activated carbon (AC) for Ventilation and Air-Conditioning (VAC). It investigated because AC is widely explored but developing AC as a filter for VAC is not developed yet. The AC prepared by physical and chemical activation process and combination both of process and it was activated by H 3 PO 4 and NaOH. Characterization and analysis process are consists of water content, ash content, bulk density, adsorption capacity, iodine number and indoor air filtering analysis. Treated activated carbon potential in achieving higher surface area of the structure to the range of 950 to 1150 m 2 /g for gas phase application. The higher surface area will adsorb more air pollution. Maintained properties of activated carbon such as hardness, density, pore, extractable ash, particle size (12 by 40 mesh) and pH are becoming the main concern in achieving high quality of activated carbon.

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Effect of VOC loading on the ozone removal efficiency of activated carbon filters

Cited by 52 publications

References 26 publications

Ozone Artifacts and Carbonyl Measurements Using Tenax GR, Tenax TA, Carbopack B, and Carbopack X Adsorbents

Ozone Artifacts and Carbonyl Measurements Using Tenax GR, Tenax TA, Carbopack B, and Carbopack X Adsorbents

An integrated ecosystem incorporating renewable energy leading to pollution reduction for sustainable development of craft villages in rural area: a case study at sedge mats village in Mekong Delta, Vietnam

Indoor Air Contaminant Adsorption By Palm Shell Activated Carbon Filter – A Proposed Study

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