Ethanol CO2 reforming on La2O3 and CeO2-promoted Cu/Al2O3 catalysts for enhanced hydrogen production
Shafiqah, Mohd Nasir No, Tran, Hai Nguyen, Nguyen, Trinh Duy, Phuong, Pham T.T., Abdullah, Bawadi, Lam, Su Shiung, Nguyen-Tri, Phuong, Kumar, Ravinder, Nanda, Sonil, and Vo, Dai Viet N. (2020) Ethanol CO2 reforming on La2O3 and CeO2-promoted Cu/Al2O3 catalysts for enhanced hydrogen production. International Journal of Hydrogen Energy, 45 (36). pp. 18398-18410.
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Abstract
3%Ce- and 3%La-promoted 10%Cu/Al2O3 catalysts were synthesized via a sequential incipient wetness impregnation approach and implemented for ethanol CO2 reforming (ECR) at 948–1023 K and stoichiometric feed ratio. CeO2 and La2O3 promoters reduced CuO crystallite size from 32.4 to 27.4 nm due to diluting impact and enhanced the degree of reduction of CuO → Cu0. Irrespective of reaction temperature, 3%La–10%Cu/Al2O3 exhibited the highest reactant conversions, H2 and CO yields followed by 3%Ce–10%Cu/Al2O3 and 10%Cu/Al2O3. The greatest C2H5OH and CO2 conversions of 87.6% and 55.1%, respectively were observed on 3%La–10%Cu/Al2O3 at 1023 K whereas for all catalysts, H2/CO ratios varying from 1.46 to 1.91 were preferred as feedstocks for Fischer-Tropsch synthesis. Activation energy for C2H5OH consumption was also reduced with promoter addition from 53.29 to 47.05 kJ mol−1. The thorough CuO → Cu0 reduction by H2 activation was evident and the Cu0 active phase was resistant to re-oxidation during ECR for all samples. Promoters addition reduced considerably the total carbon deposition from 40.04% to 27.55% and greatly suppressed non-active graphite formation from 26.94% to 4.20% because of their basic character and cycling redox enhancement.
Item ID: | 75017 |
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Item Type: | Article (Research - C1) |
ISSN: | 1879-3487 |
Keywords: | CeO 2, Cu-based catalysts, Ethanol CO, reforming 2, Hydrogen, La O 2 3, Syngas |
Copyright Information: | © 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
Date Deposited: | 02 Aug 2022 03:12 |
FoR Codes: | 40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion @ 100% |
SEO Codes: | 17 ENERGY > 1704 Energy transformation > 170402 Hydrogen-based energy systems @ 100% |
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