Exhaust Aftertreatment System
View system integration details
This page explains how Selective Catalytic Reduction (SCR) Catalyst is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A catalytic component that converts nitrogen oxides (NOx) into nitrogen and water using a reductant like ammonia or urea.
Technical details and manufacturing context for Selective Catalytic Reduction (SCR) Catalyst
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Operating Temperature | 250–450 °C | Below 250°C, conversion efficiency drops; above 450°C, catalyst may sinter. |
| Space Velocity | 10000–60000 h⁻¹ | Higher space velocity reduces NOx conversion. |
| NOx Conversion Efficiency | 90–98 % | At optimal temperature and NH3/NOx ratio. |
| NH3/NOx Ratio | 0.8–1.2 | Stoichiometric ratio is 1.0; higher ratio may cause NH3 slip. |
| Dimensions (Diameter) | 150–300 mm | Custom sizes available. |
| Dimensions (Length) | 300–600 mm | Custom sizes available. |
| Cell Density | 200–400 cpsi | Higher cell density increases surface area but may increase pressure drop. |
| Wall Thickness | 0.15–0.30 mm | Thinner walls reduce pressure drop. |
| Pressure Drop | 1–5 kPa | At rated flow; excessive pressure drop affects engine performance. |
| Sulfur Tolerance | ≤50 ppm | Higher sulfur deactivates catalyst. |
| Mechanical Strength | ≥1.5 MPa | Resistance to crushing and vibration. |
| Weight | 5–20 kg | Depends on size and substrate material. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
| pressure: | Up to 10 bar (typical 1-5 bar) |
| flow rate: | 0.5-50 m/s gas velocity |
| temperature: | 250-450°C (optimal 300-400°C) |
| space velocity: | 5000-30000 h⁻¹ (typical 15000-25000 h⁻¹) |
| ammonia to nox ratio: | 0.8-1.2 (optimal 1.0) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
A practical evidence checklist for RFQ preparation and supplier evaluation.
Compare the published product scope and source details, then include your specifications and quantity in an enquiry.
1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
The typical operating temperature range is 250–450°C. Below 250°C, conversion efficiency drops, and above 450°C, the catalyst may sinter. Always verify the exact range for your specific application with the manufacturer.
The reductant is typically ammonia derived from a urea solution (AdBlue/DEF). The solution is injected upstream of the catalyst and decomposes into ammonia, which reacts with NOx.
At optimal temperature and NH3/NOx ratio, the NOx conversion efficiency is typically 90–98%. Actual efficiency depends on operating conditions and system design.
Common formulations include vanadium pentoxide (V₂O₅) on a titanium dioxide (TiO₂) substrate, and copper-zeolite or iron-zeolite materials. The choice depends on the application and operating conditions.
This component is essential for the following industrial systems and equipment:
Commonly used trade names and technical identifiers for Selective Catalytic Reduction (SCR) Catalyst.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
Compare manufacturer profiles with relevant product and process capability.