Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
GASIFICATION STUDY OF EUCALYPTUS WOOD BASED ON THERMODYNAMIC CHEMICAL EQUILIBRIUM
Submission Author:
Everton Ribeiro , PR
Co-Authors:
Everton Ribeiro, Rodrigo Corrêa da Silva, Ismael Marchi Neto, Rafael Sene de Lima, Ricardo Salvo
Presenter: Everton Ribeiro
doi://10.26678/ABCM.ENCIT2018.CIT18-0327
Abstract
Biomass is considered an important energy source worldwide. Gasification is one of the options for conversion of biomass into gaseous fuel for both heat and power generation in distributed plants. The present study evaluates the gasification of eucalyptus wood based on computational simulations using a thermodynamic equilibrium model. The open-source program Chemical Equilibrium with Applications (CEA) developed by NASA was applied. Favorable operating parameters are identified by evaluating the syngas composition in terms of CH4, CO, CO2, H2, H2O, N2, and unconverted carbon. In addition, cold gas efficiency, carbon conversion, and heating value are also evaluated. Gasification temperatures between 400-1000 ºC and equivalence ratios between 1.0 and 8.75 are evaluated applying air as gasifying agent, while pressure is kept constant at 100 kPa. Significant values of CO and H2 concentration in the syngas is obtained at temperatures above 550 ºC which is agreement with the occurrence of homogenous and heterogeneous gasification reactions, i.e., Boudouard, water-shift and steam reforming reactions. Optimum values of cold gas efficiency and carbon conversion are identified in terms of gasification temperature and equivalence ratio. Presence of unconverted carbon is identified as a crucial factor for reducing the quality of syngas.
Keywords
Gasification, Chemical Equilibrium, Eucalyptus wood
