Iwasaki, Y., & Levi, T. (2010). Testing of biomass/coal blends for co-gasification. In: Proc. SCION Science Symposium – Next Generation Liquid Biofuels and Co-products,  Rotorua, New Zealand: December 2010.

Abstract

Coal gasification technology is receiving more interest as high-efficiency power generation technology coupled with Carbon Capture and Storage (CCS) can reduce green house gas emission.  Also, the effective utilisation of biomass is in demand from the viewpoint of global warming. Biomass is a renewable energy source as well as a carbon neutral resource.  The emissions from the utilisation of biomass do not count as green house gas emissions.  For these reasons, blended coal and biomass gasification is an attractive technology.

It is important to study the gasification reactivity of blended coal and biomass to improve the gasification technology and design of the gasification systems.  In this study a bench-scale gasification unit was designed and commissioned.  Two types of coal (lignite and sub-bituminous) and two types of biomass (Eucalyptus Nitens and Pinus Radiata) were chosen.  The blends selected ranged from 0% biomass through to 100% biomass.   The blended coal and biomass char gasification reactivities at 850°C to 950°C were measured by analysing the syngas composition using a gas chromatograph analyser and were then compared. The reactivities of lignite, E. nitens and blended lignite and E. nitens show higher reactivities than that of sub-bituminous and P. radiata.

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