Natural gas (which is close to 100 percent methane, CHJ is being considered as a spark-ignition engine fuel. The properties of methane and gasoline (assume the same properties as isooctane) and the...

Natural gas (which is close to 100 percent methane, CHJ is being considered as a spark-ignition engine fuel. The properties of methane and gasoline (assume the same properties as isooctane) and the engine details for each fuel are summarized below (4 is the fuellair equivalence ratio).