Thiswork presents a study on the effects of ethanol on carbon dioxide emissions, asa replacement fuel to gasoline. Experiments have been conducted in a productionvehicle powered by a 1.0-liter, 8-valve spark ignition engine fuelled with ablend of 78% gasoline  plus 22% anhydrousethanol (E22) and hydrous ethanol. The vehicle was tested under warmed-upconditions, with real-time measurement of exhaust carbon dioxide concentration.Mixture equivalence ratio was varied from stoichiometric to lean region. Enginespeed was tested at idle speed and 1400 rev/min. The results demonstrate that hydrousethanol produces lower exhaust carbon dioxide concentration than E22 throughoutthe whole range of mixture equivalence ratio and engine speed investigated. Foridle speed hydrous ethanol produces from 4% to 17% lower concentrations ofcarbon dioxide, in comparison with E22. At 1400 rev/min hydrous ethanol reducescarbon dioxide emissions from 75% to 9%, in comparison with E22. The resultsdemonstrate hydrous ethanol to be a good alternative fuel to reduce globalwarming effects from automobile exhaust.

Reduction of carbon dioxide emissions from automobile engine using ethanol as fuel

248th National Meeting (2014)

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