honeycomb catalyst substrate

Three -way catalysts will only give full conversion of each of these three pollutants in a gas stream containing a stoichiometric ratio of CO and NOx, as shown in the figure below. There are many reaction pathways in a Three -way catalyst system, including those shown for the . The most important reactions for removing NOx can be summarised as: 2CO + 2NO -> 2CO2 + N2 [HC] + NO -> N2 + CO2 + H2O A.Technical data of petrol vehicle honeycomb ceramic substrate: Parameters Unitstandardtypical dataCordierite crystal phasewt%≥9094Coefficient of Thermal Expansion20-800°Ccm/cm/°C≤1.8×10-6≤1.5×10-6Thermal Stability20-650°Ctimes≥13Soften Temperature°C ≥14201440Compression StrengthLengthwaysMPa1616.9HorizontalMPa56.2Specific WeightKg/L0.45-0.550.45-0.5Porosity%40-4541Water-absorbing rate%23-2523.8 B.Specification of catalyst carrier (straight hole)used in petrol engine car: Rotundity shape Ellipse shapeSpecificationmmNumber of channels (holes /square inch)Specification (mm)Number of channels (holes /square inch)Φ83×85400T146.8×77×86.4400Φ144×152.4400T120.6×80×152.4400Φ100×100400T169.7×80.7×76.2400Φ130×130400T144.8×81.3×152.4400Φ118×150400T144.8×81×76.2400Φ103×100400T169.7×80.7×101.6400Φ150×75400T144.8×81.3×100300Φ83×125400T127×63.5×107300Φ150×150300T144.8×81.3×70300Φ120×100300T144.8×81.3×150300Φ101.6×100300Race track shapeΦ94×100300P120.65× 80.01×76.2400Φ85×70300P120.65× 80.01× 76.2200Φ93×76200P144×68×150400Φ118×76200P125×80×100400