This paper presents the results of a study on a multi-stage hybrid biomass–charcoal gasication to produce low tar content
gas for engine application using coconut shell as a fuel. The performance of a gasier-engine system consisting of the hybrid
biomass–charcoal gasier, a gas cleaning=cooling system and a diesel engine is also discussed.
The lowest tar content found in hybrid coconut shell-charcoal gasication was 28 mgNm−3. Using a spray tower, producer
gas could be cooled down to 40◦C; almost tar-free gas was obtained after cooling the producer gas from the hybrid gasier
system. A three-cylinder Perkins diesel engine was tested at a constant speed of 1500 rpm on diesel alone and dual fuel
modes of operation. A maximum of 81% of the total heat energy input was replaced by the producer gas at an electricity
generation of 11:44 kWe.