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Article

Catalytic Properties and Recycling of NiFe2O4 Catalyst for Hydrogen Production by Supercritical Water Gasification of Eucalyptus Wood Chips

1
Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil
2
Energy and Bioproducts Research Institute, College of Engineering and Physical Sciences, Aston University, Birmingham B4 7ET, UK
3
Instituto de Química, Universidade Federal da Bahia (UFBA), Campus Universitário de Ondina, Salvador 40170-290, Brazil
4
Engenharia de Energia, Universidade Federal do Recôncavo da Bahia (UFRB), Feira de Santana 44085-132, Brazil
5
Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
6
School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(17), 4553; https://doi.org/10.3390/en13174553
Received: 27 July 2020 / Revised: 24 August 2020 / Accepted: 28 August 2020 / Published: 2 September 2020
(This article belongs to the Collection Feature Papers in Bio-Energy)
Nickel iron oxide (NiFe2O4) catalyst was prepared by the combustion reaction method and characterized by XRD, N2 adsorption/desorption, thermogravimetric analysis (TG), and temperature programmed reduction (TPR). The catalyst presented a mixture of oxides, including the NiFe2O4 spinel and specific surface area of 32.4 m2 g−1. The effect of NiFe2O4 catalyst on the supercritical water gasification (SCWG) of eucalyptus wood chips was studied in a batch reactor at 450 and 500 °C without catalyst and with 1.0 g and 2.0 g of catalyst and 2.0 g of biomass for 60 min. In addition, the recyclability of the catalyst under the operating conditions was also tested using recovered and recalcined catalysts over three reaction cycles. The highest amount of H2 was 25 mol% obtained at 450 °C, using 2 g of NiFe2O4 catalyst. The H2 mol% was enhanced by 45% when compared to the non-catalytic test, showing the catalytic activity of NiFe2O4 catalyst in the WGS and the steam reforming reactions. After the third reaction cycle, the results of XRD demonstrated formation of coke which caused the deactivation of the NiFe2O4 and consequently, a 13.6% reduction in H2 mol% and a 5.6% reduction in biomass conversion. View Full-Text
Keywords: catalytic gasification; supercritical water; hydrogen production; nickel iron oxide; recycling tests catalytic gasification; supercritical water; hydrogen production; nickel iron oxide; recycling tests
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MDPI and ACS Style

Borges, A.C.P.; Onwudili, J.A.; Andrade, H.; Alves, C.; Ingram, A.; Vieira de Melo, S.; Torres, E. Catalytic Properties and Recycling of NiFe2O4 Catalyst for Hydrogen Production by Supercritical Water Gasification of Eucalyptus Wood Chips. Energies 2020, 13, 4553. https://doi.org/10.3390/en13174553

AMA Style

Borges ACP, Onwudili JA, Andrade H, Alves C, Ingram A, Vieira de Melo S, Torres E. Catalytic Properties and Recycling of NiFe2O4 Catalyst for Hydrogen Production by Supercritical Water Gasification of Eucalyptus Wood Chips. Energies. 2020; 13(17):4553. https://doi.org/10.3390/en13174553

Chicago/Turabian Style

Borges, Ane C.P., Jude A. Onwudili, Heloysa Andrade, Carine Alves, Andrew Ingram, Silvio Vieira de Melo, and Ednildo Torres. 2020. "Catalytic Properties and Recycling of NiFe2O4 Catalyst for Hydrogen Production by Supercritical Water Gasification of Eucalyptus Wood Chips" Energies 13, no. 17: 4553. https://doi.org/10.3390/en13174553

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