AIR
Activated carbon is used in multiple applications for air purification. You may be required to meet state or federal regulations for emissions which are potentially harmful to the environment and/or human health. Other user needs range from reducing nuisance odors to ultra purification of gas streams.
- Reduction of mercury, dioxin, or other emissions at coal fired utilities, cement manufacturers and waste incinerators
Numerous variables impact the ability of activated carbon to remove flue gas contaminants. Operational factors including boiler type/combustion efficiency, fuel source, pollution control equipment configuration, and flue gas temperature are examples. Maximizing the contact time between the activated carbon and the flue gas, and ensuring sufficient turbulence in the gas stream are also important considerations.
See Norit products for flue gas at coal fired power plants > - Solvent recovery
Various industries use organic solvents in processes that involve eventual evaporation into the air. These solvent vapors can be recovered economically by means of an activated carbon solvent recovery system. The solvent laden air is passed through an adsorber filled with Norit activated carbons. These carbons adsorb the vapor until it is saturated and breakthrough occurs. The vapor stream is then switched to a second adsorber while the solvent is recovered in the first one by desorption with pressure steam. This cycle is repeated continuously.
See Norit products for solvent recovery > - H2S, VOC and mercaptan reduction at wastewater plants and pumping stations
Nuisance odors occur in many wastewater plants and lift stations where biological activity creates hydrogen sulfide (H2S), ammonia (NH3), volatile organic carbons (VOC) and mercaptans. Norit has revolutionary non-impregnated activated carbons that perform equivalently to the best impregnated products at a fraction of the cost.
See Norit products for odor control - municipal wastewater > - Biogas
Solid waste landfills have long been identified as emitting potentially hazardous gases to local communities. Gas is generated by the anaerobic decomposition of organic refuse over time. The gas consists primarily of CO2 and methane. Methane is 20 times as powerful a greenhouse gas precursor as CO2. Norit has a variety of activated carbons that are used in the purification of the methane gas so it can be utilized effectively.
See Norit products for biogas and landfills > - Gas masks
Industrial workers and others exposed to toxic or harmful gases can be protected by means of air filters containing special grades of activated carbon. These special activated carbons for industrial respirators meet the international standards. Norit also supplies activated carbons for military respirators and shelter filters. Most of the activated carbons are impregnated to provide both physical and chemical adsorption.
See Norit products for gas masks > - PSA (Pressure Swing Adsorption)
For hydrogen purification there are dedicated regeneration systems that operate on the principle of pressure differences. These systems are called pressure swing adsorption units (PSA) and are used in many industries around the world where technically clean hydrogen is needed.
See Norit products for pressure swing adsorption > - Process gas
Contaminants frequently have to be removed from industrial process gases to protect catalysts and downstream equipment, or to yield a pure intermediate or final gas. Activated carbon is a particularly effective medium for gas purification where contaminants are present at ppm levels.
See Norit products for process gas >