Study on the influence of composite rare earth catalyst on diesel exhaust purifying

The coating of the different components of complex oxides and perovskite type was prepared by deposition.This coating is supported on cordierite honeycomb ceramic carrier and SiC from diesel four-way exhaust purifier,study of catalytic converter for diesel exhaust purifying effect,at the same time of cationic surfactant,inorganic thixotropic agent and other additive on the properties of the coating were studied,through the N2 absorption,X-ray diffraction(XRD),differential thermal analysis(DTA) method for specific surface area and thermal stability of catalyst coating were tested to evaluate,simulation in diesel exhaust particles,using DTA method to test the composite catalyst on the particulate matter of light-off temperature decrease,diesel engine bench test results show that after the purification exhaust HC,CO,particulate and NOx emissions were 0.03,0.17,0.007 and 4.78g/(kW·h),composite catalyst soot ignition temperature was decreased to 411℃.