1998-10-19

Field Test Study of Two-Stroke Catalytic Converter in Thailand 982711

Technical feasibility study of the use of two-way catalytic converters in two-stroke motorcycles was conducted by means of a 20,000 km field-test. Three 150cc two-stroke motorcycles were retrofitted with metallic monolith catalyst. After the field test, the catalytic converters were inspected and found to be structurally intact and devoid of oil. The catalysts were not chemically poisoned. At the end of 20,000 km accumulation, the catalysts were still effective towards HC reduction. However, their light-off temperatures were shifted. White smoke was significantly reduced. However, a CO rise was observed throughout - indicating partial oxidation of HC due to insufficient availability of oxygen.

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