NOx Control Systems

Product photo 1 Product photo 2

Technical Specification

DuPont BELCO Technical Library
EDV Wet Scrubber Papers



LoTOx™ Technology and SCR Systems

Low-temperature oxidation technology (the LoTOx™ technology) is available from DuPont™ BELCO® Clean Air Technologies under license from BOC. This technology has strong synergy with EDV® scrubbing for refinery applications, such as FCCU, fluid cokers, heaters and boilers.

LoTOx™ technology has been applied to various gas streams, including refinery Fluid Cat Cracking Units (FCCU), with great success. This sturdy technology, when used in conjunction with the EDV® Wet Scrubbing System, does not require any gas flow obstruction (cannot plug during heavy dust load) and can be operated continuously for long-operation campaigns. These features make it an excellent fit for FCCU applications. By combining this technology with DuPont BELCO® EDV® Wet Scrubbing System, the operator can reduce particulates, SOx and NOx, all in a single vessel. There is no additional system to operate and maintain. An open channel is maintained for the gas, and the plot space required is low and flexible.

SCR Systems

Custom-built SCR systems using Hitachi's SCR Technology are available through DuPont™ BELCO® for refinery applications worldwide.


• Fluid Cokers
• Refinery Boilers
• Heaters

Features and Benefits

The LoTOx™ Process Advantage

  • No bypass required
  • Very high reduction of NOx, SOx and particulate all in one vessel
  • Able to achieve the most stringent reduction requirements
  • Highly reliable multi-year continuous operation
  • No in-line constrictions or catalyst modules
  • Open vessel design for trouble free operation
  • No potential for plugging
  • Automatic control of outlet NOx level by selecting a desired NOx outlet valve
  • Not effected by temperature variations (high or low)
  • Maintains constant NOx outlet level even through NOx fluctuation's at inlet
  • No ammonia slip concerns
  • Not subject to poisoning or sintering of catalyst surface due to temperature excursions
  • No concerns of SOx oxidation

DuPont™ BELCO® Clean Air Technologies offers an array of solutions for the reduction of NOx emissions. BELCO® realizes that each plant has its own particular requirements, which in most cases dictates reaching beyond a generic solution. Therefore, DuPont™ BELCO® has the ability to offer both an SCR system and the LoTOx™ Technology, and can recommend the DeNOx system to fit your application.