Activated carbon is effective at removing gas molecules and odors. Activated carbon is the most common element found in military gas masks. The most common method of activating carbon is a two-stage steaming process, which enlarges the carbon’s surface pore size. This in turn produces a more accessible internal surface area, allowing for greater odor and gas adsorption.
Zeolite is a natural mineral that has the distinct capability of adsorbing certain gas molecules. Zeolite is particularly effective in adsorbing formaldehyde, ammonia and carbon monoxide.
Activated carbon and zeolite are used to remove gases, odors and chemicals. Both have properties that allow them to adsorb chemicals and gaseous materials.