Özet:

Scope of this to investigate the steam-gasification in solar assisted gasification reactor of three types of lignite coal that produced in Turkey was investigated. In this gasification process, heat was supplied from solar energy. Using of solar energy as process heat, the discharge of pollutants is avoided, the gaseous products are not contaminated by combustion  products and the calorific value of the fuel is upgraded [1]. Turkey is a rich country in terms of reserve of lignite coal. But these lignite coal reserves have got high ash, humidity and sulphur rates and low calorific value of fuel. From this view, it is necessary to use these coals with gasification for avoiding the discharge of pollutants and upgrading the calorific value of the fuel. Furthermore, these coals are most appropriate fuel type because, they allow sensitive combustion, doesn’t leaves waste materials such as slag, ash, etc allows high combustion temperatures [2]. In this study, exergy and irreversibility calculations which are related coal type of reactor, heat exchanger and quencher are carried out from data obtained from literature and given as tables. Finally, the exergetic efficiency expressions for different coal types are obtained.

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