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How is carbon activated?Īctivated carbon is carbon that has undergone some additional processing to make it better at trapping gas molecules. Each substance creates a slightly different kind of charcoal. Wood is commonly used to make charcoal, but coconut shells and coal are also used. The industrial process of making charcoal accomplishes it by heating a substance in a vacuum chamber, which releases all the volatile compounds and leaves behind all the carbon. The black char that remains is mostly carbon. Only the readily combustible material in the wood has burned away, either because of insufficient heat or poor supply of oxygen. Picture the charred piece of wood that is left over after a campfire. These interchangeable terms refer to the remnants of incomplete combustion. Humans have been using charcoal to purify water–sometimes accidentally–for thousands of years. The colorful history of carbon filtration They cannot remove fine particles like mold, dust, or pollen from the air. They are also often used to remove odors from the air, such as the smell of tobacco smoke. They are designed to filter gases through a bed of activated carbon (also called activated charcoal) and are usually used to combat volatile organic compounds (VOCs) released from common household products. Drawbacks to using activated carbon filtersĬarbon air filters are the filters most commonly used to remove gases.
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How to effectively use an activated carbon air filter.How do carbon air filters trap gaseous pollutants?.The colorful history of using carbon filtration.The colorful history of carbon filtration.