Effect of biogas addition on particulate matter emission at idle operating mode in diesel engine

Abstract

This paper summarizes the impact of biogas induction into diesel engine on particulate matter emission at idle condition. The research was performed by introducing biogas into cylinder through intake manifold and the flow rate was controlled by a biogas dedicated flow meter. Composition of biogas used was 60% methane and 40% carbon dioxide. The experimental research showed that the particulate matter emission was reduced under biogas addition which involved diameter, surface, volume, total mass, and total number at idle operating condition. Shorter hydrocarbon chain in biogas is believed as the main parameter for the particulate emission reduction apart from lower combustion temperature. The in-cylinder combustion temperature also decreased during biogas introduction, indicating an alteration in volumetric efficiency.