AI Article Synopsis
- The study examined how eight years of natural aging affected the ability of ASC impregnated activated carbon to adsorb organic vapors and the nerve agent sarin.
- Aging increased the time it took for methanol to break through dry carbon but decreased breakthrough times for methanol and hexane in humid conditions.
- Additionally, aging reduced the carbon's protective capacity against sarin, particularly at high humidity levels, due to stronger hydrogen bonding between water and the carbon's adsorption sites.
Article Abstract
The effects of an eight-year natural aging of ASC impregnated activated carbon on the adsorption capacity and breakthrough times of model organic vapors and of the nerve agent sarin were investigated. Aging delayed methanol breakthrough from dry air on pre-dried carbon, but shortened the breakthrough time of both methanol and hexane under relative humidity (RH) of 30-85% on pre-humidified carbon. Aging also shortened the breakthrough time of the less volatile model compound 2-methoxyethanol, especially under RH of 60-85%. Aging significantly reduced the protection capacity against sarin at RH of 85%. The effects of aging on physisorption are attributed to enhanced hydrogen-bonding capability and strength of the interaction between water and adsorption sites on the carbon surface.
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| http://dx.doi.org/10.1080/15459624.2014.955180 | DOI Listing |
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