NDLI: Introducing a Novel Reactor Concept: Indirectly Fired Integrated Gasification and Steam Generation System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Alyaser, Monem Monaghan, Rory Beitelmal, Abdlmonem Fabris, Drazen
Copyright Year	2010
Abstract	This paper introduces a novel gasification reactor that uses steam gasification of carbonaceous feedstock by indirectly heating the reacting flow through a high temperature heat exchanger without the need for partial combustion with oxygen. It demonstrates the importance of gasification as a method for increasing power plant efficiency and reducing emissions. This paper also describes the computational model created to model this novel gasifier and the results of the model that illustrates the efficiency and purity advantages of the new gasifier. The reactor was modeled as a 1D counter-reacting flows heat exchanger, using the effectiveness-number of transfer units (ε-Ntu) method. The heating flow was assumed to be fully combusted at the inlet. The gasification stream was modeled as a plug flow, where the reaction is kinetically controlled. A simplified version of the Random Pore Model (RPM) was used to predict the char consumption. The results indicate that the gasification of coal with steam without partial combustion with oxygen using this new concept is feasible. The gasification reaction rates are found to be slow at temperatures less than 1200°C, but most of the char conversion, which reached about almost 100% completion, occurred at higher than 1200°C.
Starting Page	1329
Ending Page	1338
Page Count	10
File Format	PDF
ISBN	9780791844298
DOI	10.1115/IMECE2010-40950
Volume Number	Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
Conference Proceedings	ASME 2010 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2010-11-12
Publisher Place	Vancouver, British Columbia, Canada
Access Restriction	Subscribed
Subject Keyword	Oxygen Temperature Combustion Feedstock Heat exchangers High temperature Flow (dynamics) Emissions Heating Steam Chemical kinetics Coal Power stations Fuel gasification
Content Type	Text
Resource Type	Article

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