Volatile Organic Compounds
APC Technologies offers five main technologies for VOC Control:
APC also uses condensers and chiller-condenser combinations, alone or in conjunction, with some of the above technologies for VOC control depending on the application.
Choosing a VOC Control Technology
A variety of factors should be considered when selecting a VOC control technology, including regulatory requirements, VOC loading of the gas stream, and lifecycle cost of each system. APC has no bias toward any technology and is pleased to propose multiple technologies with a comparison of capital and operating costs.
- APC’s CarbonPure Activated Carbon Adsorption systems utilize activated carbon and other adsorption media to provide high VOC removal efficiencies – up to and in the excess of 99%. Activated carbon adsorption systems are generally simpler, have lower capital cost, lower maintenance, and are particularly well-suited for air streams with lower concentrations of VOCs or lower volumetric gas flow rates. CarbonPure activated carbon adsorption comes in both once-through and regenerative types. APC is media-independent and will recommend and furnish the best adsorption media available on the market for the given application.
- Condensers or condenser-chiller combinations can be used to condense out/recover some of the VOCs prior to the carbon bed or to reduce exhaust gas temperatures to a range favorable for adsorption. A reheat step may be used at times to reheat the gas above its dew point prior to the carbon bed. In applications that use expensive solvent and where solvent recovery is desired (e.g., chlorinated organics), or VOC loading levels are high, the saturated carbon bed may be regenerated with steam. Solvent recovery can provide savings that exceed the operating costs of the system, providing a return on investment.
- APC’s CP Series Catalytic Oxidizers use high-efficiency catalysts to achieve 97%-99% destruction of the VOCs at lower operating temperatures. APC applies the unique Ultra High-Efficiency Filter (UHF®) as a pre-filter to protect the catalyst and typically guarantees catalyst life for a minimum of 3 years. Depending on hydrocarbon loading and heat content of the gas stream, APC’s catalytic oxidizers may require little or no natural gas to sustain required temperatures, through the use of high-efficiency heat exchangers.
- APC’s ThermPure Thermal Oxidizers typically provide the highest achievable VOC control efficiencies – 99% plus – through high-temperature conversion of the hydrocarbons to products of combustion. APC offers primary and secondary heat exchangers to maximize the energy efficiency of the thermal oxidizer.
- APC’s GP Series Packed Tower Scrubbers can provide high VOC removal efficiencies for applications where the VOCs are soluble. GP packed tower scrubbers maximize absorption of VOCs through the use of proper up-front modeling, high-efficiency, low-loss packing, and proper scrubbing liquid management. GP scrubbers offer corrosion- and temperature-resistant construction as needed with vertical, horizontal, and multi-stage units available.
- For certain applications with condensable VOCs, APC’s Ultra High-Efficiency Filter (UHF®) system, combined with a condenser, chiller-condenser combination, or other cooling means (dilution, quench, etc.), can provide up to 95% to 99% VOC control. The UHF® system offers simultaneous high removal efficiency of the VOCs and any oil mist and solid particulate matter, without any plugging problems at all. It offers simple operation and extremely low maintenance costs, with no process downtime required for filter replacement.
VOC Control Applications
Include: adhesives, aluminum rolling mills, other aluminum fabrication plants, asphalt plants and terminals, bakeries, EV battery and lithium-ion battery plants, cannabis, chemical plants, coating operations, composites, drying ovens, food processing, furniture manufacture, foundries, indoor plant air, lubricant production, oil pipeline terminals, oil refineries, painting operations, petrochemical plants, plastics, polymers, printing, pulp and paper manufacture, metals fabrication, rendering, resins, rubber products, pharmaceuticals, scrap shredding, sealants, solar power plants, spray drying operations, steel fabrication, textile finishing, tire operations, wastewater treatment, and others.