Investigations on Emissions of Copper Coated Spark Ignition Engines with Methanol Blended Gasoline | Chapter 5 | Research Developments in Science and Technology Vol. 7

 The Problem's Background: Exhaust emissions from spark ignition engines include carbon monoxide (CO), unburned hydrocarbons (UBHC), oxides of nitrogen (NOx), and aldehydes. They induce health dangers such as vomiting, severe headaches, dizziness, haemoglobin loss, respiratory disorders such as TB, and are carcinogenic in nature if breathed. As a result, controlling these emissions is a top priority. In the face of rapidly depleting fossil resources, rising pollution levels from fossil fuels, and rising economic burdens owing to crude petroleum imports, the hunt for alternative fuels has become critical. Alcohols are ineffective gasoline alternatives since their characteristics are similar.

Aim: Exhaust emissions of two stroke and four stroke single cylinder, spark ignition (SI) engines with copper coated engines [CCE, copper-(thickness, 300 microns)] were investigated.) coated on piston crown and inner surface of cylinder head] with catalytic converter with sponge iron as catalyst and methanol mixed gasoline (80% gasoline and 20% methanol by volume) compared to conventional engine (CE) with plain gasoline operation.

Engine configurations CE and CCE, test fuels of plain gasoline and methanol mixed gasoline, with and without catalytic converter, and other design variables.

Methodology: CO, UBHC, and NOx exhaust emissions were measured using a Netel Chromatograph Multi Gas Analyzer at various brake mean effective pressures (BMEP). The wet technique was used to test aldehydes. A catalytic converter with sponge iron as a catalyst was installed in the engine. Air might be injected into the catalytic converter if necessary.

Brief Results: With both test fuels, CCE exhibited an improvement in exhaust emissions as compared to CE. In both variants of the engine, the 4-stroke engine reduced exhaust emissions more efficiently than the 2-stroke engine. With varied test fuels and both engine types, a catalytic converter with air injection dramatically decreased emissions.

Author(s) Details:

M. V. S. Murali Krishna,
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

Ch. Indira Priyadarshni,
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

Ipsita Mohanthi,
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

K. N. V. Sridevi,
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

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