How do I know if the activated carbon in a deodorizing filter is saturated?
asked 18 February 2016 asked by Breizh'eau (27180 points)
Hello, I'm not aware of any saturation indicators, and getting your filter analyzed is not really worth the investment. The supplier must have given you some information about the life of the filter based on average exposure rates. Your best bet is to stay one load ahead and define the time frame based on your experience with the installation in question. Bearing in mind that significant exposure linked to low levels of ferric chloride, for example, can instantly saturate the filter.
Hi breizhau, The usual recommendation is to replace the activated carbon load annually. Humidity, for example moisture coming out of a physico-chemical wet scrubber, can quickly saturate carbon downstream. If the phenomenon is recurrent, you could try zeolite-impregnated media.
Hi In terms of virgin activated carbon, I think that an iodine value should tell you what your available surface area is in m2/g. The iodine value is synonymous with the "activated" capacity of the carbon. In general, it should be below 50 for 100 mg/g of surface air. Regards