Vol 6, No 6 (2015) > Mechanical Engineering >

Fluidized Bed Co-gasification of Coal and Solid Waste Fuels in an Air Gasifying Agent

I Nyoman Suprapta Winaya, Rukmi Sari Hartati, I Putu Lokantara, I GAN Subawa, I Made Agus Putrawan

 

Abstract:

The increased need to reduce carbon dioxide
emissions to prevent global warming have led to an interest in biomass and solid
waste as fuel sources. As a potential renewable energy resource, biomass and
solid waste materials are receiving more attention worldwide. A number of
techniques and methods have been proposed for reducing gaseous emissions from a
fossil fuel conversion thermal system. This paper presents a pilot-scale
bubbling fluidized bed gasifier with a diameter of 0.68 m and a height of 1.50
m using an oil burner to heat the bed. This study used four types of biomass
materials mixed with coal at different mass composition ratios in an air
gasifying agent. The gasification tests were conducted under steady-state at an
operating condition that is typical for gasification. The influence that the
solid waste and coal ratio had on gasification efficiency was investigated. The
gasification efficiency and the carbon conversion efficiency increased when the
mass ratio of the solid waste fuels increased.

Keywords: Coal; Co-gasification; Fluidized bed gasification; Solid waste

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