Enhanced ethanol steam reforming by CO2 absorption using CaO, CaOMgO or Na2ZrO3

• Published in: International journal of hydrogen energy Vol. 39; no. 29; pp. 16595 - 16607
• Main Authors: Aceves Olivas, D.Y., Baray Guerrero, M.R., Escobedo Bretado, M.A., Marques da Silva Paula, M., Salinas Gutiérrez, J., Guzmán Velderrain, V., López Ortiz, A., Collins-Martínez, V.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 02.10.2014; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; CO2 capture; Energy; Ethanol reforming; Exact sciences and technology; Fuels; H2 production; Hydrogen; Na2ZrO3; H2 production; CO2 capture; Ethanol reforming; Na2ZrO3; Na; Ethanol; Hydrogen; production; ZrO; Carbon dioxide; CO2 sequestration; H; capture; Steam reforming; CO
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2014.04.156

This paper presents results of thermodynamic analysis and experimental evaluation of hydrogen production by steam reforming of ethanol (SRE) combined with CO2 absorption using a mixture of a solid absorbent (CaO, CaO*MgO and Na2ZrO3) and a Ni/Al2O3 catalyst. Thermodynamic analysis results indicate that a maximum of 69.5% H2 (dry basis) is feasible at 1 atm, H2O/C2H5OH = 6 (molar ratio) and T = 600 °C. whereas, the addition of a CO2 absorbent at 1 atm, T = 600 °C and H2O/C2H5OH/Absorbent = 6:1:2.5, produced a H2 concentration of 96.6, 94.1, and 92.2% using CaO, CaO*MgO, and Na2ZrO3, respectively. SRE experimental evaluation achieved a maximum of 60% H2. While combining SRE and a CO2 absorbent exhibited a concentration of 96, 94, and 90% employing CaO, CaO*MgO, and Na2ZrO3, respectively at 1 atm, T = 600 °C, SV = 414 h−1 and H2O/C2H5OH/absorbent = 6:1:2.5 (molar ratio). [Display omitted] •Thermodynamic analysis & experimental H2 production by steam reforming of ethanol.•Enhanced steam reforming of ethanol using a solid CO2 absorbent.•Evaluation of Na2ZrO3 synthetic absorbent combined with ethanol steam reforming.