A comprehensive energy-exergy-based assessment and parametric study of a hydrogen production process using steam glycerol reforming

Various assessment tools are applied to comprehensively investigate a giycerol-to-hydrogen production system. These tools investigate the chemical reactions, design and simulate the entire hydrogen production process, study the energetic and exergetic performances and perform parametric analyses (us...

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Bibliographic Details
Published in:Energy (Oxford) 2014, Vol.64, p.473-483
Main Authors: HAJJAJI, Noureddine, CHAHBANI, Amna, KHILA, Zouhour, PONS, Marie-Noëlle
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Assessments
Chemical reactions
Chemical Sciences
Design engineering
Energy
Ethyl alcohol
Exact sciences and technology
Exergy
Fuels
Hydrogen
Hydrogen production
Methane
Reforming
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Summary:Various assessment tools are applied to comprehensively investigate a giycerol-to-hydrogen production system. These tools investigate the chemical reactions, design and simulate the entire hydrogen production process, study the energetic and exergetic performances and perform parametric analyses (using intuitive and design of experiment-based methods). Investigating the chemical reaction of steam glycerol reforming reveals that the optimal conditions, determined based on maximizing the hydrogen production while minimizing the methane and carbon monoxide contents and coke formation, can be achieved at a reforming temperature and a water-to-glycerol feed ratio (WGFR) of 950 K and 9, respectively. The thermal and exergetic efficiencies of the resulting process are 66.6% and 59.9%, respectively. These findings are lower than those cited in the literature and relative to other reformates (methane, ethanol and methanol). The parametric investigation indicates that the performance of the process (energetic and exergetic) could be ensured by using an appropriate and judiciously selected combination of the reactor temperature and WGFR. Based on the parametric energetic and exergetic investigation, WGFR = 6 and T = 1100 K appear to be the most accurate parameters for the entire glycerol-to-hydrogen process. For this recommend configuration, the thermal and exergetic efficiencies are 78.1% and 66.1%, respectively.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2013.10.023