Catalytic Properties and Recycling of NiFe 2 O 4 Catalyst for Hydrogen Production by Supercritical Water Gasification of Eucalyptus Wood Chips

Ane Caroline Pereira Borges, Jude Azubuike Onwudili, Heloysa Andrade, Carine Alves, Andrew Ingram, Silvio Vieira de Melo and Ednildo Torres
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Ane Caroline Pereira Borges: Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil
Jude Azubuike Onwudili: Energy and Bioproducts Research Institute, College of Engineering and Physical Sciences, Aston University, Birmingham B4 7ET, UK
Heloysa Andrade: Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil
Carine Alves: Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil
Andrew Ingram: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Silvio Vieira de Melo: Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil
Ednildo Torres: Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federação/Ondina, Universidade Federal da Bahia (UFBA), Salvador 40170-115, Brazil

Energies, 2020, vol. 13, issue 17, 1-17

Abstract: Nickel iron oxide (NiFe 2 O 4 ) catalyst was prepared by the combustion reaction method and characterized by XRD, N 2 adsorption/desorption, thermogravimetric analysis (TG), and temperature programmed reduction (TPR). The catalyst presented a mixture of oxides, including the NiFe 2 O 4 spinel and specific surface area of 32.4 m 2 g −1 . The effect of NiFe 2 O 4 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 H 2 was 25 mol% obtained at 450 °C, using 2 g of NiFe 2 O 4 catalyst. The H 2 mol% was enhanced by 45% when compared to the non-catalytic test, showing the catalytic activity of NiFe 2 O 4 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 NiFe 2 O 4 and consequently, a 13.6% reduction in H 2 mol% and a 5.6% reduction in biomass conversion.

Keywords: catalytic gasification; supercritical water; hydrogen production; nickel iron oxide; recycling tests (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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