The Exergy Analysis for the Air Gasification in a Hybrid Fixed Bed Gasifier
Robert Eliraison Moshi
Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania and Department of Automotive Engineering, Arusha Technical College (ATC). P. O. Box 296 Arusha, Tanzania.
Thomas Thomas Kivevele
Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania and African Centre of Excellence in Water Infrastructure and Sustainable Energy Futures (WISE-Futures), The Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Tengeru, P.O. Box 9124, Nelson Mandela, Arusha, Tanzania.
Yusufu Abeid Chande Jande *
Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania and African Centre of Excellence in Water Infrastructure and Sustainable Energy Futures (WISE-Futures), The Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Tengeru, P.O. Box 9124, Nelson Mandela, Arusha, Tanzania.
*Author to whom correspondence should be addressed.
Abstract
Municipal solid waste (MSW) is becoming a concern as population in urban area is increasing. Several disposal methods (landfill and biochemical) have been used. However, waste to energy (WTE) particularly gasification technology is a potential technology for energy recovery. The system is used to convert biodegradable material into syngas under limited gasifying media. This study presents numerical analysis of producer gas for the two air paths in the hybrid fixed bed gasifier (HFBG). It was revealed that the optimum operating condition was achieved when the air ratio at the first air flow path (AIR1) was 0.3. Furthermore, the exergy efficiency of about 81.51% was achieved.
Keywords: Gasification, aspen plus, waste to energy, fixed bed gasifier, exergy