IJEP 42(5): 543-548 : Vol. 42 Issue. 5 (May 2022)
1. Chaitanya Bharathi Institute of Technology, Department of Mechanical Engineering, Gandipet, Hyderabad – 500 075, Telangana, India
2. Gayatri Parishad College of Engineering, Department of Mechanical Engineering, Madhurwada, Visakhap-atanam – 530 048, Andhra Pradesh, India
Abstract
Health hazards, environmental impact and greenhouse effect caused by spark-ignition engine emissions of carbon monoxide (CO), unburnt hydrocarbons (UBHC) emissions and nitrogen oxide (NOx) are to be immediately addressed. Alcohols are important substitutes for gasoline, as their properties are comparable to gasoline fuel, especially their cetane numbers are higher than that of gasoline. If the engine is run with alcohol, carcinogenic aldehydes are also to be checked. Investigations were carried out to control pollutants from a four-stroke, variable speed, variable compression ratio, single-cylinder, spark-ignition (SI) engine, with normal butanol, blended gasoline (80% gasoline and 20% butanol by volume) provided with catalytic converter with copper as a catalyst and compared with conventional SI engine (CE) with neat gasoline operation. Exhaust emissions of CO, HC and NOx were evaluated at different values of brake mean effective pressure of the engine. A microprocessor-based analyser was used for the measurement of nitrogen oxide levels and CO/HC in the exhaust of the engine. Formaldehyde and acetaldehyde levels were measured by wet-method. The engine was provided with a catalytic converter with copper as a catalyst along with air injection. Catalytic converter with air injection significantly reduced pollutants with test fuels.
Keywords
Spark-ignition engine, Alternative fuels, Exhaust emissions, Catalytic converter, Air injection
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