Question

Why methanol is not used in CI engine?

(a) Its octane number is high

(b) Its cetane number is low

(c) Its octane number is high and the cetane number is low

(d) Its octane number is low and the cetane number is high

The question was asked by my college director while I was bunking the class.

The question is from Alternative Fuels for IC Engines in section Alternative Energy Sources of Automobile Engineering

Answer 1

The correct option is (c) Its octane number is high and the cetane number is low

Easy explanation: Methanol is not used in CI engines because of its high octane number and low cetane number. Pure methanol and gasoline in various percentages have been extensively tested in engines and vehicles for a number of years.