M
Marcus Antônio de Freitas Melo
Researcher at Federal University of Rio Grande do Norte
Publications - 83
Citations - 1554
Marcus Antônio de Freitas Melo is an academic researcher from Federal University of Rio Grande do Norte. The author has contributed to research in topics: Catalysis & Adsorption. The author has an hindex of 19, co-authored 82 publications receiving 1207 citations.
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Journal ArticleDOI
Characterization and comparative study of pyrolysis kinetics of the rice husk and the elephant grass
Renata Martins Braga,Dulce Maria de Araújo Melo,F. M. Aquino,Julio Cezar de Oliveira Freitas,Marcus Antônio de Freitas Melo,Joana M. F. Barros,Maria do Socorro Braga Fontes +6 more
TL;DR: In this paper, the apparent activation energy needed to break the bonds of hemicelluloses and cellulose of rice husk and elephant grass during the thermal conversion was evaluated according to the kinetics models of Flynn and Wall and Model Free Kinetics developed by Vyazovkin.
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Catalytic pyrolysis-GC/MS of Spirulina: Evaluation of a highly proteinaceous biomass source for production of fuels and chemicals ☆
Bruna M. E. Chagas,Bruna M. E. Chagas,Christina Dorado,Michelle J. Serapiglia,Charles A. Mullen,Akwasi A. Boateng,Marcus Antônio de Freitas Melo,Carlos Henrique Ataíde +7 more
TL;DR: In this article, the catalytic pyrolysis of Spirulina (Arthrospira spp.) over several zeolite catalysts using GC-MS was studied to explore the optimum and scalable conditions for the production of stable liquid intermediates via analysis of condensable vapors.
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Evaluation of CoAl2O4 as ceramic pigments
Dulce Maria de Araújo Melo,J.D. Cunha,J.D.G Fernandes,Maria Inês Basso Bernardi,Marcus Antônio de Freitas Melo,Antonio Eduardo Martinelli +5 more
TL;DR: In this paper, a mixture of Co and Al oxalates at a ratio of 1:8 (Co:Al) was obtained from FTIR spectroscopy, X-ray diffraction, and thermal analysis.
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Preparation and characterization of lanthanum palygorskite clays as acid catalysts
D.M Araújo Melo,J.A.C Ruiz,Marcus Antônio de Freitas Melo,E. V. Sobrinho,Antonio Eduardo Martinelli +4 more
TL;DR: Palygorskite clays containing 2, 4, 6 or 10% lanthanum (w/w) were prepared by ion exchange from acid-leached natural clays as mentioned in this paper.
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Adsorption of crude oil on anhydrous and hydrophobized vermiculite
Umberto G. da Silva,Marcus Antônio de Freitas Melo,Adaı́lton F. da Silva,Robson F. de Farias +3 more
TL;DR: In this article, the authors reported the adsorption of crude oil on vermiculite samples, expanded and hydrophobized with carnauba (Copernicia Cerifera) wax.