Hydrogen yield of conventional biomass gasification is limited by chemical equilibrium constraints. A novel technique that has the potential to enhance the hydrogen yield by integrating the gasification and absorption reactions has been suggested. The method involves gasification of biomass in presence of a sorbent. Ethanol was used as the model biomass compound and CaO was the representative sorbent. Equilibrium modeling was used to determine the product gas composition and hydrogen yield. The analysis was done using ASPEN PLUS software (version 12.1) and the Gibbs energy minimization approach was followed. The effects of temperature, pressure, steam/ethanol ratio, and CaO/ethanol ratio on product yield were investigated. Three case studies were conducted to understand the effect of sorbent addition on the hydrogen yield. Thermodynamic studies showed that the use of sorbents has the potential to enhance the equilibrium hydrogen yield of conventional gasification by and reduce the equilibrium content of product gas by 50.2%. It was also found that the thermodynamic efficiency of sorbent-enhanced gasification (72.1%) was higher than conventional gasification (62.9%). Sorbent-enhanced gasification is a promising technology with a potential to improve the yield and lower the cost of hydrogen production.
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e-mail: mahishi@ufl.edu
e-mail: ameli@und.edu
e-mail: sanv@ufl.edu
e-mail: goswami@eng.usf.edu
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January 2008
Research Papers
A Novel Approach to Enhance the Hydrogen Yield of Biomass Gasification Using Sorbent
Madhukar R. Mahishi,
Madhukar R. Mahishi
Mechanical & Aerospace Engineering,
e-mail: mahishi@ufl.edu
University of Florida
, P.O. Box 116300, Gainesville, FL 32611-6300
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M. S. Sadrameli,
M. S. Sadrameli
Department of Chemical Engineering,
e-mail: ameli@und.edu
University of North Dakota
, Grand Forks, ND 58202
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Sanjay Vijayaraghavan,
Sanjay Vijayaraghavan
Mechanical and Aerospace Engineering,
e-mail: sanv@ufl.edu
University of Florida
, P.O. Box 116300, Gainesville, FL 32611-6300
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D. Y. Goswami
D. Y. Goswami
Clean Energy Research Center,
e-mail: goswami@eng.usf.edu
University of South Florida
, 4202 E Fowler Avenue, Tampa, FL 33620
Search for other works by this author on:
Madhukar R. Mahishi
Mechanical & Aerospace Engineering,
University of Florida
, P.O. Box 116300, Gainesville, FL 32611-6300e-mail: mahishi@ufl.edu
M. S. Sadrameli
Department of Chemical Engineering,
University of North Dakota
, Grand Forks, ND 58202e-mail: ameli@und.edu
Sanjay Vijayaraghavan
Mechanical and Aerospace Engineering,
University of Florida
, P.O. Box 116300, Gainesville, FL 32611-6300e-mail: sanv@ufl.edu
D. Y. Goswami
Clean Energy Research Center,
University of South Florida
, 4202 E Fowler Avenue, Tampa, FL 33620e-mail: goswami@eng.usf.edu
J. Eng. Gas Turbines Power. Jan 2008, 130(1): 011501 (8 pages)
Published Online: November 2, 2007
Article history
Received:
September 5, 2005
Revised:
December 23, 2006
Published:
November 2, 2007
Citation
Mahishi, M. R., Sadrameli, M. S., Vijayaraghavan, S., and Goswami, D. Y. (November 2, 2007). "A Novel Approach to Enhance the Hydrogen Yield of Biomass Gasification Using Sorbent." ASME. J. Eng. Gas Turbines Power. January 2008; 130(1): 011501. https://doi.org/10.1115/1.2747252
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