Adsorption
Activated Carbon Adsorption
Envanio’s activated carbon adsorption is based on the physical adsorption process to purify industrial process air of volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) from industrial exhaust air, with the option for solvent recovery. In our regenerative systems, both the adsorbent and solvents are recovered for reuse, while in non-regenerative systems, the spent activated carbon is safely disposed of or replaced along with the captured pollutants.
Low-Maintenance Design
Thanks to very high destruction efficiencies of up to 99.9%, the Envanio system ensures compliance with strict environmental regulations and emission limits.
Custom Designs
We design and manufacture fully pre-assembled, skid-mounted units tailored directly to your site-specific operational requirements.
Solvent Recovery
With our regenerative activated carbon adsorption systems, up to 99% of captured solvents can be recovered and returned to production, driving greater profitability and lowering raw material costs.
Adsorptive Recovery of a Wide Range of Solvents
| Process | Adsorption (Regenerative System) |
|---|---|
| Air Flow Rate | 1,000 Nm³/h to 1,230,000 Nm³/h* |
| Solvent Concentration | up to 10 g/Nm³ |
| Exhaust Gas Temperature | maximum 40 °C |
| Exhaust Air Humidity | maximum 55% |
| Destruction Efficiency | up to 99% |
| Typical Target Pollutants | Ethylacetate, Toluene, Methylene Chloride, Eptane, Halogenated Hydrocarbons, Pentane |
Each system is custom-designed based on your requirements and processes.
* The maximum air flow rate depends on the number of activated carbon beds and can be scaled as needed.
Non-Regenerative Systems as a Cost-Effective Alternative
For applications with total annual emissions of less than ten metric tons, non-regenerative activated carbon adsorption systems offer an economical, low-capital solution. Our non-regenerative activated carbon adsorption systems effectively remove trace amounts of diverse pollutants from exhaust air, ranging from volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) to solvents, odors, and hydrogen sulfide (H₂S). Once the carbon bed is fully saturated, it is exchanged for fresh activated carbon. These systems are available as single units or pre-assembled skids to minimize installation time and on-site commissioning.
Typical Applications for Activated Carbon Adsorption
Envanio designs and manufactures systems for the purification of exhaust air and the recovery of solvents tailored to the specific requirements of your facility’s production processes. Thanks to their rugged design and reliable solvent recovery, our activated carbon adsorption systems are well suited for the following applications.
360° Service for Your Air Pollution Control System
Take advantage of our 360° support for air pollution control systems from Envanio or third-party manufacturers. Our service teams support your plant throughout the entire equipment lifecycle, providing routine inspections, preventative maintenance, system audits, efficiency retrofits, repairs, and genuine replacement parts.
More Ways to Treat Exhaust Air
To deliver solutions tailored to your specific requirements and varying operating conditions, Envanio offers a wide range of standard and custom-engineered air pollution control systems based on thermal oxidation.
Regenerative Thermal Oxidation
Regenerative thermal oxidation (RTO) is a highly efficient process that cleans industrial exhaust by destroying hazardous air pollutants (VOCs and HAPs) and eliminating unpleasant odors. By using internal ceramic heat exchange media, the system traps and recycles its own heat, making the entire purification process incredibly energy efficient.
Electric Regenerative Thermal Oxidation
Envanio's electrically heated regenerative thermal oxidizer (eRTO) combines high VOC destruction efficiency, operational reliability, and exceptional energy performance. By using electric heating elements instead of gas-fired burners, the system avoids combustion-related byproducts and significantly reduces NOₓ emissions. The result is a cleaner, more sustainable solution for industrial air pollution control.
Recuperative Thermal Oxidation
Recuperative thermal oxidation is a highly efficient process that cleans industrial exhaust air by destroying hazardous air pollutants (VOCs and HAPs) and eliminating unpleasant odors. The system is also well suited for processes where particulate matter and aerosols are generated. An integrated metallic shell-and-tube heat exchanger enables efficient primary heat recovery.
Direct Fired Thermal Oxidation
Direct fired thermal oxidation is a highly efficient process that cleans industrial exhaust by destroying hazardous air pollutants (VOCs and HAPs) and eliminating unpleasant odors. The system is particularly well-suited when heavily contaminated exhaust streams must be treated reliably with high removal efficiencies, and when complex heat recovery systems are not economically feasible.
VOC Concentration
Envanio’s VOC concentration process uses adsorption to concentrate dilute solvent emissions. For cost-effective air pollution control, adsorption is recommended first to concentrate large exhaust airflows with low pollutant loads. The concentrated exhaust air is then routed to downstream recuperative or regenerative thermal oxidation for highly energy-efficient destruction.
Catalytic Hot Gas Filtration
Envanio’s catalytic hot gas filtration is based on an integrated 3-in-1 process for industrial hot gas and exhaust air purification. Rigid, high-temperature ceramic filter elements enable the simultaneous removal of particulate dust, heavy metals, sulfur oxides (SOx), and nitrogen oxides (NOx) from process exhaust in a single compact system.
Wet Scrubbing
Envanio’s wet scrubbers rely on absorption for the wet separation of inorganic compounds, particulates, mist, and acidic gases. During the regenerative or direct-fired thermal oxidation of halogenated hydrocarbons or sulfur compounds, substances such as hydrogen halides or SOx are generated, which must be scrubbed from the exhaust air in a downstream wet scrubber.
Liquid Distillation
Envanio’s distillation systems efficiently separate solvents from water and split complex solvent mixtures into reusable components. Integrated recovery processes reduce raw material consumption and operating costs, with flexible designs for batch or continuous operation.
