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THREE WAY CATALYTIC CONVERTER
A method of treating exhaust gas uses catalytic
converters. These converts the gaseous pollutants into
harmless gasses
A catalyst is a material that causes a chemical change
without entering into the chemical reaction
Modern cars are equipped with 3 way catalytic
converters
3 way refers to the three way regulated emission
It reduce-CO
Unburned HC and nitrogen oxide molecules
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In the catalytic converter, there are two different types of
catalyst at work, a reduction catalystand an oxidation
catalyst. Both types consist of a ceramic structure coated
with a metal catalyst, usually platinum, rhodium and/or
palladium. The idea is to create a structure that exposes the
maximum surface area of catalyst to the exhaust stream,
while also minimizing the amount of catalyst required, as thematerials are extremely expensive. Some of the newest
converters have even started to use gold mixed with the
more traditional catalysts. Gold is cheaper than the other
materials and could increase oxidation, the chemical reactionthat reduces pollutants, by up to 40 percent
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Reduction catalyst
It Is the first stage of the cc
It uses platinum and rhodium
It help to reduce the nitrogen oxide emission
Such molecules come in contact with calalyst,cataylist ribs
nitrogen atom out of the molecule and hold on to it
Freeing oxygen in form of O2
Nitrogen inton2
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It is a part of everyvehicle to regulate theemissions from
harmful gases thatpollute the enviroment.
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On 13 September 2001, the Government ofIndia constituted a committee of expert of
national reputed, headed by Dr. R A
Mashelkar, the then Director General,Council of Scientific and Industrial Research
(CSIR) to recommend an Auto Fuel Policy
for the country, to devise a road map for itsimplementation and recommend suitable
auto fuels, automobile technologies and
fiscal and institutional measures.
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Auto Fuel Policy report marked out11 metro cities, namely, Delhi (NCR),
Kolkata, Mumbai, ChennaiHyderabad, Ahmadabad, Surat,Pune, Bangalore, Kanpur, and Agrafor stricter standards due to thehigh levels of air pollution by theAuto Fuel Policy.
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New improved Pollution Under Control (PUC)
checking system for vehicles.
Inspection & maintenance (I&M) system for
vehicles.
Performance checking system of catalytic
converter and conversion kits for CNG/LPG. Augmentation of city public transport system.
Compliance of emission norms by city public
service vehicles and inter State vehicles.
For entire country, the proposed roadmap is implementation of Bharat stage-III
norms preferably from 1 April 2008 but not later than 1 April 2010 in the entirecountry.
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BY- ABHISHEK SAXENA