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Energies 2017, 10(3), 314; doi:10.3390/en10030314

Simulation of Steam Gasification in a Fluidized Bed Reactor with Energy Self-Sufficient Condition

1
Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
2
School of Engineering, University of Bradford, Bradford BD7 1DP, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Paolo Mercorelli
Received: 29 November 2016 / Accepted: 2 March 2017 / Published: 6 March 2017
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Abstract

The biomass gasification process is widely accepted as a popular technology to produce fuel for the application in gas turbines and Organic Rankine Cycle (ORC). Chemical reactions of this process can be separated into three reaction zones: pyrolysis, combustion, and reduction. In this study, sensitivity analysis with respect to three input parameters (gasification temperature, equivalence ratio, and steam-to-biomass ratio) has been carried out to achieve energy self-sufficient conditions in a steam gasification process under the criteria that the carbon conversion efficiency must be more than 70%, and carbon dioxide gas is lower than 20%. Simulation models of the steam gasification process have been carried out by ASPEN Plus and validated with both experimental data and simulation results from Nikoo & Mahinpey (2008). Gasification temperature of 911 °C, equivalence ratio of 0.18, and a steam-to-biomass ratio of 1.78, are considered as an optimal operation point to achieve energy self-sufficient condition. This operating point gives the maximum of carbon conversion efficiency at 91.03%, and carbon dioxide gas at 15.18 volumetric percentages. In this study, life cycle assessment (LCA) is included to compare the environmental performance of conventional and energy self-sufficient gasification for steam biomass gasification. View Full-Text
Keywords: energy self-sufficient; fluidized bed gasifier; ASPEN Plus; life cycle assessment (LCA) energy self-sufficient; fluidized bed gasifier; ASPEN Plus; life cycle assessment (LCA)
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MDPI and ACS Style

Suwatthikul, A.; Limprachaya, S.; Kittisupakorn, P.; Mujtaba, I.M. Simulation of Steam Gasification in a Fluidized Bed Reactor with Energy Self-Sufficient Condition. Energies 2017, 10, 314.

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