We use cookies, similar technologies and tracking services

This website uses cookies, similar technologies and tracking services (hereinafter referred to as “Cookies”). These Cookies help to display our website, improve it based on your user behavior (e.g., via Salesforce Pardot) and present content aligned with your interests (e.g., LinkedIn Insights, Google Ads). We require your consent to use Cookies. Additionally, we incorporate content from third-party providers (e.g., Microsoft Azure for single sign-on authentication), which could involve transferring your data to the United States, a non-secure third country. By clicking Accept All, you consent to the use of non-essential Cookies and to your data being transferred to third countries. Clicking Refuse enables you to reject the use of non-essential Cookies. Please select which Cookies we may use under Details. More information, particularly about your rights as a data subject, is available under Details or in our Privacy Policy .

Details

Refuse

Accept

Below, you can activate/deactivate the individual technologies that are used on this website.

Accept All

Essential

These Cookies make a website usable by providing basic functions such as page navigation, language settings, Cookie preferences and access to protected areas of the website. Cookies in this category additionally ensure that the website complies with the applicable legal requirements and security standards. Owing to the essential nature of these Cookies, you cannot prevent their use on our website. Details about these Cookies are available under More Information.

Functionality and personalization

These Cookies collect information about your habits when using our web pages and help us to enhance your user experience by tailoring the functions and attractiveness of our web pages based on your previous visits, location and browser settings. They also enable access to integrated third-party tools on our website (e.g., Microsoft Azure for single sign-on authentication). This can involve transferring your data to the United States, a non-secure third country. If you refuse these Cookies, you might not be able to access the full functionality of the website. Details about the tools we use are available under More Information.

Analysis

These Cookies are used to compile basic usage and user statistics based on how our web pages are used. If you accept these Cookies, you simultaneously consent to your data being processed and transmitted to the United States by services such as Salesforce Pardot. Details about the tools we use are available under More Information.

Marketing and social media

These Cookies help third-party sources collect information about how you share content from our website on social media or provide analytical data about your user behavior when you move between social media platforms or between our social media campaigns and our web pages (e.g., LinkedIn Insights). Marketing Cookies from third-party sources also help us measure the effectiveness of our advertising on other websites (e.g., Google Ads). We use these Cookies to optimize how we deliver our content to you. The third-party sources and social media platforms we use can transfer your data to the United States, a non-secure third country. If you accept these Cookies, you simultaneously consent to your data being transferred and processed as described above. Details about the tools we use and our social media presence are available under More Information.

More information

Save Settings

Regenerative catalytic oxidizer (RCO)

Regenerative catalytic oxidizer systems combine the advantages of regenerative heat exchangers with those of catalytic oxidation. They are used to reduce pollutant levels in exhaust air that is not heavily contaminated and to minimize odors.

RCO benefits

  • Lower operating expenditure than conventional regenerative thermal oxidizers. Lower natural gas consumption and reduced fan output.
  • Long catalyst life of five or more years
  • Low NOx levels – mainly flameless operation
  • Highly efficient where VOC levels are low
  • Increased volume when converting an RTO to a RCO
  • High levels of efficiency combined with low operating expenditure

When volatile organic compounds (VOCs) exist in a solvent-laden exhaust air stream of a manufacturing process, they are either collected for recovery for potential re-use or they are destroyed. When the solvents have little or no recovery value or where there are concerns for disposal of toxic compounds, a destruction technology from Dürr such as thermal or catalytic oxidation may be the best option.

Our regenerative catalytic oxidizers (RCOs) combine the low operating temperature of catalytic oxidizers with the heat storage and recovery characteristics of a regenerative thermal oxidizer (RTO). This combination provides the lowest operating cost VOC oxidation technology available for applications with low VOC concentrations.

Operating principle RCO

The RCO is a regenerative thermal oxidizer with a catalyst above the heat exchanger bed. The catalyst material is either a base metal or a precious metal that gives rise to a chemical reaction with incoming volatile organic compounds (VOCs) or hazardous air pollutants (HAPs). This lowers the required reaction temperature. As a result, less heat and therefore less external energy are needed to convert the pollutants. The temperature in the combustion chamber can be reduced from 850°C to below 500°C. After the pollutants have been converted, the clean exhaust air can leave the system.

Application areas RCO

RCO systems can be used in a wide variety of industries because of the range of optional equipment available to accompany them. These systems can be found in the chemical, pharmaceutical, timber, and rubber and latex industries.

  • Chemical
  • Pharmaceutical
  • Timber
  • Rubber & Latex

Technical specifications RCO

RCO systems can effectively treat process flows from 5000 Nm3/h to over 80,000 Nm3/h containing the following pollutants at concentrations ranging from <1 g/Nm3 to 10 g/Nm3:

  • VOCs (non-methane hydrocarbons)
  • Methane
  • Carbon monoxide (CO)

The efficiency levels of the systems range from 95% to more than 98%.

Construction RCO

The RCO is similar in design to a conventional RTO system. However, it is fitted with an additional catalyst and operates at a lower combustion chamber temperature. The efficient recovery of heat by the ceramic heat exchanger enables the RCO to treat exhaust gases with low pollutant concentrations of just under 1 g/Nm3 without the use of additional primary energy sources.

RTO to RCO retrofit

While your existing RTO system may have been designed for optimum thermal efficiency at the time it was manufactured, new advances in media and catalysts give us more options for many exhaust streams that lend themselves to catalytic technology. In some cases, by converting from RTO to RCO, our customers can recognize a 50% reduction in fuel usage. Many actually achieve an operating condition (self-sustain) with no additional fuel required for oxidation.

The RTO to RCO conversion is a relatively simple conversion and often works in combination with your existing ceramic media, and can typically be accomplished with only a few days of equipment down-time.

Contact Dürr to find out about the efficiencies we can offer with an RCO or RTO to RCO conversions.