| Ceramic Based Catalytic Convertors
for Diesel Vehicles |
Roy Johnson, B. P. 8aha, I. Ganesh, V. Mahender, 8. Bhattacharjee, Y. R. Mahajan and M. M. K. Khaja
Pages : 93-95
DOI : 10.1080/0371750X.2000.10799928 |
| Abstract |
| Recently implemented Euro norms for pollutants from diesel
operated vehicles necessitates the stringent control of carbon
monoxide (CO), unburned hydrocarbons (HC), nitrogen oxides
(NO.) as well as particulates. Out of the various technological
options available for the control of these pollutants, catalytic
convertor in combination with catalyzed diesel particulate filter
is identified as one of the available practical systems to achieve
the desired emission limits. However, the successful operation
of this system, based on catalyst technology, requires the use
of low sulphur content diesel. Hence in India, this technology
becomes much complicated due to high sulphur content (0.25 -
0.3 wt%) diesel in use. This is because reduction in one pollutant
can result in the increase of the other especially in the case
of particulates. In an effort to provide a practical solution through
the catalytic control for a high sulphur containing diesel exhaust,
a convertor system consisting of reticulated foam coated with a
combustion catalyst in combination with indigenously developed
honeycombs with a selective three way catalyst has been developed.
The convertor has been evaluated for its performance
using high speed, medium duty diesel engine at Automotive
Research Association of India, Pune. The convertor has indicated
a simultaneous decrease in CO, HC, NO. and particulates as
presented in this paper. |
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