Advanced Catalytic Oxidizer for Efficient VOCs Treatment

Lower Temperature, Higher Efficiency, Cleaner Emissions

Brief Introduction

Catalytic Recuperative Oxidizers (CO) utilize catalysts—either precious metals or common metal oxides—to reduce the activation energy required for reactions between organic compounds in VOCs and oxygen. This enables complete oxidation at significantly lower temperatures, achieving flameless combustion. The high-temperature oxidized gas then passes through a heat exchanger, where it transfers heat to the incoming exhaust stream. This process typically achieves a heat recovery rate of over 75%.
CO systems are widely used to treat high-concentration VOC exhaust generated from adsorbent regeneration and desorption processes.

Theory

Before entering a Catalytic Recuperative Oxidizer, VOC-laden gas is first preheated through a heat exchanger. The preheated gas then enters the oxidizer and is raised to the catalyst’s operating temperature. As the pollutants contact the catalyst, an exothermic reaction occurs, converting them into carbon dioxide and water vapor.

The clean, hot flue gas subsequently flows back through the heat exchanger, transferring thermal energy to the incoming air before being discharged through the chimney.

By selecting catalysts with lower oxidation temperatures, the required inlet temperature can typically be reduced to 250–305°C. During oxidation, heat released in the catalytic bed causes the chamber temperature to rise—for example, up to around 300°C—depending on VOC concentration and calorific value. Because of the lower required inlet temperature, less external energy is needed to maintain oxidation conditions, resulting in notable energy savings.

Characteristics

RUIDING’s Catalytic Recuperative Oxidizers offer several key advantages:

Lower ignition temperatures enable highly efficient purification while improving heat-exchange performance, resulting in reduced energy consumption and lower operating costs.

The compact and integrated layout minimizes construction and installation expenses, while ensuring convenient operation and maintenance.

RUIDING utilizes a mature waste heat recovery system, maximizing energy reuse. This allows stable production without additional fuel input, generating superheated steam and delivering significant economic benefits.

A rectangular catalytic reactor design improves convenience during catalyst loading, replacement, installation and maintenance.

RUIDING’s CO systems use palladium- and platinum-based stainless steel metal honeycomb catalysts, offering high activity, excellent thermal stability (up to 730°C), strong mechanical durability, long service life (4–5 years), low pressure drop, and easy cleaning. These characteristics make the system adaptable to a wide range of VOC conditions.