Selective catalytic reduction (SCR) catalyst
Shell Catalysts & Technologies provides reliable technology for selective catalytic reduction (SCR) of nitrogen oxides (NOx) from stationary and mobile combustion sources and chemical processes.
Shell DeNOx System (SDS) catalyst technology
SDS can help you achieve required performance while consuming less energy.
Proven around the world, Shell DeNOx System (SDS) catalyst technology provides high NOx reduction across a broad range of conditions.
Because of its Lateral Flow Reactor (LFR) based design, low-temperature activity, and extremely low-pressure drop, SDS can help your operations achieve the performance you require while consuming less energy – supporting your facility’s overall energy reduction program.
Benefits of our selective catalytic reduction (SCR) catalyst system
For certain applications, the SCR Catalyst System can be installed between the economiser/HRSG and the stack, helping to reduce installation costs, plant downtime and disruption.
Reduce costs
Reduce downtime
Reduce disruption
About SDS and selective catalytic reduction (SCR)
Cost-effective NOx reduction
The Shell Catalysts & Technologies SCR Catalyst System is based on the addition of ammonia (NH3) to the NOx-containing flue gas and passing the mixture over an active catalyst. This converts the nitrogen oxides (NO and NO2) to naturally occurring nitrogen (N2) and water (H2O).
Together, our high-activity catalyst and low-pressure drop result in cost-effective NOx reduction. The SCR technology is impressively cost-efficient compared to other NOx control technologies.
At low temperatures, SDS outperforms other catalyst systems
This makes our DeNOx system a highly cost-effective retrofit for existing facilities where exhaust temperatures are low.
Backed by the strength of Shell, the SCR Catalyst System not only enables your powerful environmental and cost benefits, but it also comes with the service and support you expect from a respected global leader.
Explore the Shell Catalysts and Technologies portfolio
Carbon dioxide purification catalyst
High-performance catalysts to remove trace contaminants from carbon dioxide streams prior to further use in chemical, agricultural and/or food applications.
Dioxin Removal
Shell Catalysts & Technologies provides technology for the catalytic destruction of dioxins and furans from municipal solid and hazardous liquid waste incineration facilities.
Learn more about our DeNOX catalyst system
Boilers and turbines
The Shell DeNOx System offers outstanding operational performance, including low ammonia slip, low-pressure drop, tolerance against tube rupture and direct water contact.
Unlike alternative NOx control technologies, the Shell Catalysts & Technologies SCR Catalyst System does not disrupt turbine or heat-recovery equipment operation.
Furnace and heaters
For existing installations, no modifications to either the furnace or the heat recovery section are necessary. For new furnaces, the location of the SCR Catalyst System helps maximise the operational flexibility of the furnace.
The SCR Catalyst System offers significant performance advantages over primary NOx reduction measures when low NOx emission levels are required.
Waste incineration and biomass
High NOx removal capability at low temperatures allows the SCR Catalyst System to be integrated at the end of flue gas treatment systems on waste incineration plants with minimal or no gas reheat.
