CPI Installs RTO for Landfill RNG Tail Gas Emissions

    Catalytic Products International (CPI) installed a 10,000 SCFM Regenerative Thermal Oxidizer RTO at a Renewable Natural Gas (RNG) facility located at a Mid-Southern landfill to control waste gas from its LFG purification process.  


    CPI RTO 10.95 Landfill RNG

    Landfill gas (LFG) is generated in municipal solid waste landfills as the organic wastes decompose anaerobically. Instead of escaping into the air, LFG can be captured, converted, and used as a renewable energy resource. 

    To produce RNG the landfill gas undergoes several stages of treatment.  During the advanced treatment stage to upgrade to pipeline quality, temperature swing adsorption (TSA) and nitrogen rejection unit (NRU) systems, are widely used to remove CO2, O2, N2, siloxanes, and VOCs.  The waste or tail gas from this treatment must often be controlled using a flare or thermal oxidizer before being released to the atmosphere.

    The 10,000 SCFM TRITON 10.95 Regenerative Thermal Oxidizer (RTO) controls waste or tail gas emissions from the membrane separation system, the nitrogen rejection unit (NRU) and the temperature swing adsorption (TSA) system. The RTO will successfully destroy the methane and VOCs from the treatment process with 98% destruction rate efficiency (DRE) and a thermal efficiency of 95%.

    Working closely with the customer and its EPC, CPI designed, fabricated and delivered the Regenerative Thermal Oxidizer with hot gas bypass and an exhaust stack. CPI also provided startup & training services.

    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 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 costs.

    CPI manufactures Regenerative Thermal Oxidizers (RTOs) to provide exceptional performance and reliability. During operation of the standard two chamber RTO, the VOCs are directed into one of the system’s regenerators, an internally insulated vessel containing specialized ceramic media which allows thermal rate efficiencies up to 97%. The contaminated gases are passed through the first regenerator where energy is transferred from the ceramic media to the gas in order to elevate the temperature. This elevated temperature approaches the ignition level for most solvents and is then directed from the ceramic bed into the combustion chamber. As the stream exits the ceramic bed and travels through the internally lined combustion chamber, minimal heat is added to ensure a proper oxidation temperature and a designed dwell time is maintained providing destruction of the VOCS at greater than 98% efficiency. The resultant clean, oxidized gases are directed to the second regenerator to absorb the heat energy before being released to the atmosphere.

    CPI has been “Enabling Clean Production Since 1969” and continues as a leading supplier of air pollution control equipment. CPI is at the forefront in providing renewable natural gas (RNG) applications with solutions to their air pollution 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.

    Topics: Air Pollution Control, Regenerative Thermal Oxidizer, Blog, Emissions Capture, Renewable Fuel, RNG

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