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Kinetic model for noncatalytic supercritical water gasification of cellulose and lignin
Author(s) -
Resende Fernando L. P.,
Savage Phillip E.
Publication year - 2010
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12165
Subject(s) - cellulose , lignin , supercritical fluid , biomass (ecology) , chemistry , kinetics , sensitivity (control systems) , kinetic energy , reaction rate , reaction rate constant , thermodynamics , pulp and paper industry , chemical engineering , organic chemistry , catalysis , engineering , physics , oceanography , quantum mechanics , electronic engineering , geology
This article reports the first kinetics model for Supercritical Water Gasification (SCWG) that describes the formation and interconversion of individual gaseous species. The model comprises 11 reactions, and it uses a lumping scheme to handle the large number of intermediate compounds. We determined numerical values for the rate constants in the model by fitting it to experimental data previously reported for SCWG of cellulose and lignin. We validated the model by showing that it accurately predicts gas yields at biomass loadings and water densities not used in the parameter estimation. Sensitivity analysis and reaction rate analysis indicate that steam‐reforming and water–gas shift are the main sources of H 2 in SCWG, and intermediate species are the main sources of CO, CO 2 , and CH 4 . © 2010 American Institute of Chemical Engineers AIChE J, 2010