Abstract
This paper assesses biogas as a viable alternative
vehicle fuel particularly in the more popular petrol vehicle
which was retrofitted to a bi-fuel system. Biogas was compared
to other popular substitute fuels used in spark ignition systems
with the aim to justify it as the ideal replacement fuel for petrol.
Furthermore, a sweep test was employed to evaluate the
performance of biogas in a bi-fuel vehicle and compared to the
performance of the same vehicle when it ran on petrol. A 16%
drop in power output was experienced when biogas was used to
power the vehicle. Simulated biogas was used in the study and it
was produced by mixing methane and carbon dioxide of 95%
and 5% by volume respectively.