S
Sandra S.X. Chiaro
Researcher at Petrobras
Publications - 35
Citations - 974
Sandra S.X. Chiaro is an academic researcher from Petrobras. The author has contributed to research in topics: Adsorption & Layered double hydroxides. The author has an hindex of 16, co-authored 33 publications receiving 829 citations. Previous affiliations of Sandra S.X. Chiaro include Federal University of Rio de Janeiro.
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Journal ArticleDOI
On the Extraction of Aromatic Compounds from Hydrocarbons by Imidazolium Ionic Liquids
Cláudia C. Cassol,Alexandre P. Umpierre,Gunter Ebeling,Bauer Ferrera,Sandra S.X. Chiaro,Jairton Dupont +5 more
TL;DR: In this article, a ternary system formed by n-octane and aromatic (alkylbenzenes) and heteroaromatic compounds (nitrogen and sulfur containing heterocyles) and 1-alkyl-3-methylimidazolium ionic liquids (ILs) associated with various anions was investigated.
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Comparative Structural, thermodynamic and electronic analyses of ZnAlAn− hydrotalcite-like compounds (An −Cl−, F−, Br−, OH−, CO32 − or NO3−): An ab initio study
TL;DR: In this paper, the influence of different anions intercalated in the layered double hydroxides (LDHs) was investigated, and the main aim was to understand the layer-anion and the intermolecular interactions in hydrotalcite-like compounds with F−, Br−, OH−, CO32− and NO3−.
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Structural Model Proposition and Thermodynamic and Vibrational Analysis of Hydrotalcite-Like Compounds by DFT Calculations
Deyse G. Costa,Alexandre B. Rocha,Renata Diniz,Wladmir F. Souza,Sandra S.X. Chiaro,Alexandre A. Leitão +5 more
TL;DR: In this article, a model to calculate the electronic structure of hydrotalcite-like compounds by using periodic boundary conditions and ab initio density functional theory (DFT) was proposed.
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Direct comparison between two γ-alumina structural models by DFT calculations
Ary R. Ferreira,Mateus José Martins,Elena Konstantinova,Rodrigo B. Capaz,Wladmir F. Souza,Sandra S.X. Chiaro,Alexandre A. Leitão +6 more
TL;DR: In this paper, the authors compared two important {gamma}-alumina models proposed in literature, a spinel-like one and a nonspinel one, to perform a theoretical comparison.
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Supported ionic liquid phase rhodium nanoparticle hydrogenation catalysts.
Marcos A. Gelesky,Sandra S.X. Chiaro,Flávio A. Pavan,João Henrique Zimnoch dos Santos,Jairton Dupont +4 more
TL;DR: In this article, the effect of the sol-gel catalyst (acid or base) on the encapsulated ionic liquid and Rh(0) content, on the silica morphology and texture, and on the catalyst alkene hydrogenation activity was investigated.