Air Pollution Advice

Tier 1 Automotive Parts Supplier Installs RTO for Painting

Written by Jan Carlson | Jan 22, 2026 4:14:31 PM

Catalytic Products International (CPI) installed a new Regenerative Thermal Oxidizer (RTO) at a Midwest USA composite automotive parts supplier for the abatement of Volatile Organic Compounds (VOCs).


  • Process Type:  Automotive Parts Painting
  • VOCs: Toluene, Ketones, Acetates 
  • Air Volume: 30,000 SCFM
  • Control Type: Regenerative Thermal Oxidizer (RTO) 
  • Destruction Rate Efficiency (DRE): 98%
  • Installation: RTO, stack, fan inlet duct skid with process by-pass T-dampers, control room.

The 30,000 SCFM TRITON-30.95 Regenerative Thermal Oxidizer (RTO) controls emissions from a spray booth, flash-off area, and drying oven. The RTO was designed using the same design criteria established for similar CPI installations at the customer’s sister facilities.

The RTO will destroy the VOC emissions with 98% destruction rate efficiency and a thermal efficiency of 95%.

Thermal treatment of VOCs and other air pollutants works by a simple reaction of the harmful hydrocarbon-based air pollutants with oxygen and heat. In this environment, the VOCs are chemically oxidized to form harmless inert by-products like CO2, water vapor (H2O), and usable heat. These harmless by-products are released to the atmosphere or used within primary or secondary energy recovery techniques to further lower the operational cost.

The Regenerative Thermal Oxidizer (RTO) system incorporates specialized ceramic media in the regenerator (heat transfer bed) to allow thermal efficiencies up to 97%. RTOs operate by preheating the process air as it passes upward through the first ceramic heat exchange media. This pre-heated air then exits the heat exchange media and enters a combustion chamber where it is heated to the setpoint temperature and oxidization of the VOCs is completed at greater than 98% efficiency. The resultant hot, clean air stream is then passed downward through the second ceramic heat exchange media bed where it is cooled before being released to the atmosphere.

Catalytic Products International (CPI) worked closely with this longtime customer and paint system supplier to design, fabricate, and supply the Regenerative Thermal Oxidizer (RTO). The mechanical and electrical installation of the RTO included booster fan, exhaust stack, compressed air desiccant dryer, fan inlet duct skid with process by-pass T-dampers, and a skid mounted electrical control room. This approach, along with CPI start-up, commissioning, and onsite support for the formal compliance test guaranteed that the entire system was installed correctly, returning the customer to fully operational status with minimal downtime.

CPI has been “Enabling Clean Production™ Since 1969” and continues as a leading supplier and manufacturer of Regenerative Thermal Oxidizers (RTO) for large and small air volume VOC applications.  CPI is at the forefront in providing industries including metal coating facilities with solutions to their air pollution VOC control needs.

Today, CPI partners with its customers as a trusted resource in resolving the most complex air pollution and energy conservation problems. We provide our customers with innovative and cost-conscious solutions to their most complex VOC, NOx, and Odor pollution challenges. Our equipment is also at work meeting energy conservation strategies and minimizing greenhouse gas (GHG) emissions.