Tail gas emission control purifier NSC purification catalyst for internal combustion engines

Abstract

The invention discloses a tail gas emission control purifier NSC purification catalyst for internal combustion engines, wherein a honeycomb ceramic carrier or a honeycomb metal carrier is taken as a main matrix, and titanium dioxide, zeolite, manganese dioxide and silica sol are taken as composite base coatings to jointly form a purification catalyst carrier of the tail gas emission control purifier NSC purification catalyst. The tail gas emission control purifier NSC purification catalyst for internal combustion engines is invented aiming at the situation of sulfur-containing fuel oil, manganese dioxide is added into a traditional purification catalyst to serve as a sulfur removal agent, manganese dioxide, titanium dioxide and zeolite are mixed and then subjected to ion exchange, so thatmanganese dioxide is uniformly distributed in a base layer slurry; the uniformity of the content of the coating interval of each layer of a final product is ensured; active sites of noble metals are protected from being combined with sulfur to the greatest extent, so that the purpose of prolonging the service life of the purification catalyst is achieved, some performances of thermal shock are improved, the relative cost is low, the activation performance is good, the sulfur resistance is high, raw materials are easy to purchase, and the catalyst can be popularized and used in internal combustion engines.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an NSC purification catalyst for an exhaust emission control purifier for an internal combustion engine. Background technique [0002] At present, my country's manufacturing industry is in an important transition period. The country pays more and more attention to environmental protection, and the country has higher and higher requirements for environmental protection purifiers. Especially for the internal combustion engine industry, it is urgent to fully implement low-emission engines. With the current internal combustion engine technology and the current The fuel situation cannot produce a zero-emission internal combustion engine. [0003] The exhaust gas emitted by the internal combustion engine contains CO, HC, NOx and SOx. Among them, Sox mainly comes from the sulfide in the fuel. After the combustion of the internal combustion engine, part of the sulfide is converted into SO...

AI Technical Summary

Problems solved by technology

NSC is easily affected by the sulfur combustion product SO2 in fuel oil, and finally the catalyst cannot function, which seriously affects the efficiency of adsorbing NOx

Therefore, in order to exert the effect of NSC, fuel oil with sufficiently low sulfur content must be used, but the use of fuel oil with sulfur content cannot be completely avoided under current circumstances