Specialty-blended activated carbon optimize adsorption for hard-to-filter chemicals.
By utilizing specialty-blended activated carbon filters, facilities can benefit from added adsorption rates aiding to improve operator safety and overall air quality. Certain chemicals such as formaldehyde are hard to filter using standard activated carbon filters. For these harder to filter chemical fumes, Sentry Air offers a variety of specialty-blended filter media.
What are specialty-blended activated carbon filters?
Specialty-blended activated carbon filters are activated carbon that has been treated or impregnated with proprietary reagents to improve the adsorption or removal of a specific chemical fume from the airflow. Chemicals such as formaldehyde have a smaller molecular size which can slip through carbon’s pores without being properly adsorbed and can quickly saturate standard carbon filters leading to frequent filter changes (Kaibo 2022). Aldehyde treated activated carbon helps improve the adsorption of formaldehyde and other aldehydes due to its unique design and treatment process.
What types of specialty-blended activated carbon filters are available?
Acid Gases
Acid Gases
Acid Gas impregnated activated carbon filters offer solutions for working with hydrochloric acid, sulfuric acid, and nitric acid. Acid gases have a strong acidic nature and do not readily react to standard activated carbon. Once treated, acid gas impregnated carbon can help protect the operator and environment from inhaling harmful chemical fumes. We tested the acid gas impregnated filter media in our 30” Ductless Fume Hood using sulfur dioxide and found the filter offered a 99.89% removal rate. Likewise, we conducted a similar test with hydrochloric acid vapors and produced >99.99% removal rate with no detectable hydrochloric acid vapors after filtration. For a link to the full white paper – please click here.
Formaldehyde/Aldehydes
Aldehydes
Aldehyde treated activated carbon can help remove aldehyde impurities from a natural gas stream and help protect the surrounding environment. Formaldehyde fumes from painting or restoration processes can be readily adsorbed utilizing aldehyde impregnated filter media. We tested our aldehyde treated filter media in our Winged Sentry unit and found a removal rate of >99.3%. We conducted the same test using our standard activated carbon filter and found only a 95.45% removal rate. The aldehyde treated activated carbon filters exhibited a much higher removal rate than standard activated carbon filter media. For a link to the full white paper – please click here.
Ammonia/Organic Amines
Aldehydes
Ammonia impregnated activated carbon can help with the removal of ammonia vapor released from applications such as amine gas treating in the oil and gas industry. Other processes that use ammonia include manufacturing plastics, textiles, pesticides, and dyes as well as waste water treatment. Also, applications that use organic amines, derivates of ammonia, can benefit from utilizing ammonia treated filter media to help remove harmful vapors from the airflow.
Expert Chemical Assessment
Are you unsure of what filter to use or if filtration is appropriate for your application? At Sentry Air we offer FREE chemical assessment from our on-staff chemical engineer. Provide a few details about the chemical(s) used, concentration, application process, and required dimensions for the procedure. We will work with you to find the best-suited solution including filters and air cleaning systems. If we don’t think it safe to filter or wouldn’t work efficiently, we will be honest with you and suggest alternatives.
Offer your employees respiratory protection by using specialty blended filter media for hard-to-filter chemical fumes. Contact us today for your expert chemical assessment.
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