CNG Engine Catalytic Converter
This technique is the production jointly exploited by my company
and professor Chen Shaoping from Nanchang university application
chemical graduate school, it has following good characteristics:
Using honeycomb ceramics carrier that has many advantages, such as
low cost, strong adhesive and active ingredient, long life etc. .
Adopting late-model of rare earths (material Zirconium and
Titanium) to advance the heat resistance and activity of catalyst.
Introducing transitional metal, alkaline earth metal and active
material of little precious metal that has plenty of excellences,
such as high purification rate, and low burning temperature etc..
Making use of new-style of oxygen storing stuff that reduces the
burning temperature of catalyst and complete transformation.
The catalytic converter applied and produced by this technique has
past the test of Shanghai national exhaust gas test center and
Tianjin university burning internal-combustion engine lab, the
result indicates: using this cat that can make the emission
standard reach European no.3 and meet the technique requirements
the converter product demands.
The special exhaust gas catalytic converter for CNG engine is
composed of two parts, that are catalyst of honeycomb ceramics and
metal shell, the main elements is:
The exhaust gas pass through the catalyst of honeycomb ceramics,
the active ingredient of catalyst (mostly are metal oxide of rare
earths, precious metal and transitional metal) is able to carry out
the catalysed reaction fully under the temperature condition of 200
to 300 celsius degree aboved converting the harmful element such as
CO, HC, NOX etc. to innocuous water, carbon dioxide and nitrogen.
a. key technique The core of this programm is the exhaust gas
decontamination technique of CNG engine, which belongs to three-way
decontamination catalyst technique, and is the main means of
dealing with exhaust gas of CNG engine at present.
The main chemical reaction formula as follows.
Oxidation reaction: HC+O2=H2O+CO2
Deoxidization reaction: NOx+HC+CO=N
