Combustion Engine running = Exhaust = Emissions
Type of emission
Treament
Noise
Silencers
HC
Oxicat (Oxidation catalyst)
CO
Oxicat (Oxidation catalyst)
PM
Diesel Particle Filter (DPF)
NOx
Selective Catalytic Reduction SCR (catalyst)
Sulphur
Scrubber/Better fuel quality
Heat
None/Cooler/Water Injection/Heat Recovery
Exhaust technologies
Silencer type
Description
Reduction
Remarks
Standard or tailormade silencers
Absorptive silencers
Reactive silencers
Combination silencers Silent boxes
Reactive silencers
Combination silencers Silent boxes
Noise reduction: 25-75 dB
Emission reduction: none
Emission reduction: none
Mild steel
Stainless
With or without spark arrestor
Tailormade: All shapes and materials.
Stainless
With or without spark arrestor
Tailormade: All shapes and materials.
Green Line Silencers Type GLS
Silencers with integrated catalyst (Oxicat)
Combination of silencer and catalyst.
Combination of silencer and catalyst.
Noise reduction: 25-75 dB
Emission reductions:
CO: up to 90%
HC: up to 75%
Particles up to 30% (in opacity).
Emission reductions:
CO: up to 90%
HC: up to 75%
Particles up to 30% (in opacity).
Easy installation
No extra space necessary
High performance of catalyst due to placing in the centre of the exhaust gas.
No extra space necessary
High performance of catalyst due to placing in the centre of the exhaust gas.
DPF
Silencers with integrated DPF (Special coating)
Combination of silencer, catalyst and DPF
Regeneration of filters in different ways.
Combination of silencer, catalyst and DPF
Regeneration of filters in different ways.
Noise reduction: 25-75 dB
Emission reductions:
NOx: None
CO: Up to 90%
HC: Up to 75%
Particles: Min. 95%.
Emission reductions:
NOx: None
CO: Up to 90%
HC: Up to 75%
Particles: Min. 95%.
High performance systems except NOx + Sulphur
Relatively high exhaust temp. required for regeneration
Bypass valve as part of construction.
Relatively high exhaust temp. required for regeneration
Bypass valve as part of construction.
SCR systems
Combination of silencer, catalyst and a DPF filter
Regeneration of filters in different ways
Injection of Urea for NOx reduction.
Regeneration of filters in different ways
Injection of Urea for NOx reduction.
Noise reduction: 25-75 dB
Emission reductions:
NOx: Up to 90%
CO: Up to xx% (Option)
HC: Up to xx% (Option)
Particles: Up to xx% (Option)
Emission reductions:
NOx: Up to 90%
CO: Up to xx% (Option)
HC: Up to xx% (Option)
Particles: Up to xx% (Option)
High performance system, special on NOx.
Complicated systems with Urea injection and complete Control system.
Limited reduction on particles.
Complicated systems with Urea injection and complete Control system.
Limited reduction on particles.
DPF/In combination
Silencer with integrated catalyst/soot filters
Combination of silencer, catalyst and a soot filter
Regeneration of filters in different ways. Injection of Urea for NOx reduction
Combination of silencer, catalyst and a soot filter
Regeneration of filters in different ways. Injection of Urea for NOx reduction
Noise reduction: 25-75 dB
Emission reductions:
NOx: Up to 90%
CO: Up to 90%
HC: Up to 75%
Particles: Min. 95%
Emission reductions:
NOx: Up to 90%
CO: Up to 90%
HC: Up to 75%
Particles: Min. 95%
High performance system, also on NOx.
Relatively high exhaust temp. required for regeneration.
Bypass valve part of construction.
Complicated systems with Urea injection.
Relatively high exhaust temp. required for regeneration.
Bypass valve part of construction.
Complicated systems with Urea injection.
