Selective reduction catalyst calibration method

Abstract

The invention discloses a selective reduction catalyst calibration method which comprises the following steps: testing a chemical reaction of an SCR small sample to obtain a small sample test result; calibrating a simulation model of the SCR small sample according to the small sample test result to obtain small sample model parameters; calibrating a simulation model of the SCR system according to the sample model parameters, and obtaining system model parameters. According to the selective reduction catalyst calibration method, the SCR small sample calibration strategy is adopted, the simulation model of the SCR small sample is calibrated firstly to obtain small sample model parameters, the simulation model of an SCR system is calibrated on the basis to obtain system model parameters, an accurate SCR simulation model is established through SCR small sample calibration, and the problem that the simulation model is inconsistent with the actual model can be avoided; the SCR aftertreatment system can be developed through the calibrated simulation model of the SCR system, development of the SCR aftertreatment system of the diesel engine can be rapidly achieved, consumption of manpower and material resources is reduced, and refined development of the aftertreatment system is achieved.

Description

technical field [0001] The invention relates to the technical field of selective catalytic reduction, in particular to a calibration method for a selective reduction catalytic converter. Background technique [0002] NOx emissions from diesel engines mainly include NO and NO in the exhaust 2 two kinds. The chemical properties of NO are very active. After reacting with oxygen, it will form NO 2 . NO 2 It is reddish-brown under normal temperature and pressure, has a pungent smell, is easily soluble in water, poisonous, and easily liquefied; NO 2 After being inhaled into the human body, it will have a strong stimulating and corrosive effect on the lungs. Due to the composition of NO x are the two main components in the air N 2 and O 2 , they are harmless, so the ideal situation is to set NO x decomposed into N 2 and O 2 . However, the cost of direct decomposition is very high, so it is generally used at a certain temperature to use the catalytic effect of the cataly...

AI Technical Summary

Problems solved by technology

[0008] The traditional SCR system development mainly meets the regulatory requirements through different SCR system selection and calibration methods in the test stage. The development cycle is long, consuming a lot of manpower and material resources, and it is impossible to achieve refined post-processing system development.

However, with the intensification of market competition, design engineers must adopt more targeted measures to shorten the development cycle; in addition, due to increasingly stringent emission regulations, the difficulty of developing after-discharge treatment systems has increased significantly

Images