Green hydrogen Production from the oxidative reform of clean biogas over Ni/MgO-Nb2O5 catalysts

Authors

  • Yvan Jesus Olortiga Asencios
  • Elisabete M. Assaf Universidade de São Paulo

DOI:

https://doi.org/10.34024/jsse.2023.v1.15904

Keywords:

methane, biogas, synthesis gas, catalysts, nickel, niobium

Abstract

Synthesis gas has a variety of applications ranging from its transformation into Fischer-Tropsch fuels, its processing to produce pure hydrogen, and even its direct combustion to generate energy, among many other applications. The objective of this work was the conversion of a model of biogas (clean biogas) into synthesis gas, H2 /CO, through oxidative reforming of methane over NiO/MgO/Nb2O5 catalysts. The catalysts in this work were prepared by impregnation and calcination (at 750ºC) and subsequently characterized by Energy Dispersive X-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Nitrogen Adsorption-Desorption (BET method) and Temperature Programmed Reduction with H2 (TPR). Finally, these catalysts were tested in the oxidative reform of methane (molar ratio of 1.5CH4:1CO2:0.25O2) at 750 ºC, 100mg of catalyst at a total flow of  110 mL.min-1, and 1 atm (inside the reactor). According to the results, it was verified that the catalyst composed of the NiO/MgO mixture is composed of the NiO-MgO solid solution, whereas the NiO/MgO/Nb2O5 catalysts are also formed by nickel niobate (NiNb2O6). All catalysts showed catalytic activity in the oxidative form of biogas,  NiMg, Ni60NbMg, and Ni40NbMg catalysts showed the highest conversion value. The efficiency of the catalysts in the oxidative reforming of biogas improved gradually as the %MgO increased in the NiO/MgO/Nb2O5 system. The characterization of the catalyst after the reaction demonstrated that the carbon formed is of the filamentous type.

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Author Biography

Elisabete M. Assaf, Universidade de São Paulo

ELISABETE MOREIRA ASSAF COMPLETED A DOCTORATE IN CHEMICAL ENGINEERING FROM THE UNIVERSITY OF SAO PAULO IN 1994. SHE IS CURRENTLY ASSOCIATE PROFESSOR AT THE UNIVERSITY OF SAO PAULO. PUBLISHED AROUND 150 ARTICLES IN SPECIALIZED JOURNALS AND 240 WORKS IN EVENT ANNALS. SHE PARTICIPATED IN SEVERAL EVENTS ABROAD AND BRAZIL. SHE HAS SUPERVISED SEVERAL MASTER'S DISSERTATIONS AND DOCTORATE THESIS, IN ADDITION TO SUPERVISED POST-DOCTORAL WORK, SUPERVISED SCIENTIFIC INITIATION WORK, AND COURSE COMPLETION WORK IN THE AREAS OF CHEMISTRY AND CHEMICAL ENGINEERING. IN HER PROFESSIONAL ACTIVITIES, SHE INTERACTED WITH NUMEROUS COLLABORATORS IN CO-AUTHORSHIP OF SCIENTIFIC WORKS. HER SCIENTIFIC AND TECHNOLOGICAL PRODUCTION FOCUSES ON THE FOLLOWING TOPICS: STEAM REFORMING REACTIONS AND OXIDATIVE REFORMING OF HYDROCARBONS (METHANE), ALCOHOLS (ETHANOL AND GLYCEROL) AND CARBOXYLIC ACIDS (ACETIC ACID) FOR GENERATION OF HYDROGEN, OXIDATION REACTIONS PARTIAL HYDROCARBONS, CO2/CO HYDROGENATION REACTIONS FOR PRODUCTION OF C2-C4 COMPOUNDS, NITROGEN OXIDE REACTIONS, PREPARATION OF CATALYSTS BASED ON NICKEL, COBALT, COPPER, NOBLE METALS AND OTHER METALS SUPPORTED ON Al2O3, ZrO2, CeO2, SiO2, ETC ., PEROVSKITES, HYDROTALCYTES, AND CHARACTERIZATION OF CATALYSTS.

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Additional Files

Published

2023-11-13

How to Cite

Olortiga Asencios, Y. J., & M. Assaf, E. (2023). Green hydrogen Production from the oxidative reform of clean biogas over Ni/MgO-Nb2O5 catalysts. Journal of Science & Sustainable Engineering , 1(1), 10. https://doi.org/10.34024/jsse.2023.v1.15904

Issue

Vol. 1 No. 1 (2023): Sustainable Development goals: an engineering approach

Section

Original Articles

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