L.N. Brondani
Universidade Federal de Santa Maria
Supercritical fluidInteresterified fatNuclear chemistryKineticsDegradation (geology)CatalysisReaction rateHeterogeneous catalysisOrganic chemistryInorganic chemistryChemistryMethyl acetateAcetic acidTriacetinPhosphateAcrocomia aculeataFirst-order reactionDimethyl carbonateSoybean oilMixed oxideGlycerolOleic acidReagentChemical engineeringNiobiumBiodieselYield (chemistry)Biodiesel productionChemical equilibrium
6Publications
5H-index
63Citations
Publications 8
Newest
#1L.N. Brondani (UFSM: Universidade Federal de Santa Maria)H-Index: 5
#2Luiz Jardel Visioli (UFSM: Universidade Federal de Santa Maria)H-Index: 5
Last. F. de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 1
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#1Dian Celante (UFSM: Universidade Federal de Santa Maria)H-Index: 8
#2Lisiane O. Diehl (UFSM: Universidade Federal de Santa Maria)
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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#1L.N. Brondani (UFSM: Universidade Federal de Santa Maria)H-Index: 5
#2J.S. Ribeiro (UFSM: Universidade Federal de Santa Maria)H-Index: 4
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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Abstract This work presents the development of a kinetic model for simultaneous reactions of esterification and interesterification from macaw oil and methyl acetate using γ-alumina as the heterogeneous catalyst. Experimental data varied between 225 °C and 300 °C, catalyst concentration of 2 wt%, 5 wt%, and 10 wt% and molar ratio (methyl acetate: Oil) of 10:1, 20:1 and 40:1. Arrhenius kinetic parameters were concomitantly estimated for all experimental conditions by minimizing the objective usin...
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#1S. S. Simões (UFSM: Universidade Federal de Santa Maria)H-Index: 2
#2J.S. Ribeiro (UFSM: Universidade Federal de Santa Maria)H-Index: 4
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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Abstract This study aimed the investigation of a potential heterogeneous catalyst for the interesterification reaction for soybean biodiesel production. Different types of catalysts (Y Zeolite, MgO, Nb2O5 and mixed oxides) were tested in this work. Ca–Mg–Al mixed oxide with 40% wt. Ca was the more suitable catalyst for interesterification reaction. Effects of temperature, catalyst content and methyl acetate to oil molar ratio on product yields were investigated through kinetic experiments. Kinet...
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#1Matheus Al Alves (UFSM: Universidade Federal de Santa Maria)H-Index: 1
#2Nadini Sc Pinheiro (UFSM: Universidade Federal de Santa Maria)H-Index: 1
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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#1L.N. Brondani (UFSM: Universidade Federal de Santa Maria)H-Index: 5
#2S. S. Simões (UFSM: Universidade Federal de Santa Maria)H-Index: 2
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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In this study, it has been proposed a process model for catalytic supercritical interesterification considering degradation reactions at high temperatures. Kinetic parameters of soybean oil and methyl acetate (MeA) reaction using Ca–Mg–Al mixed oxide as catalyst considering main and intermediate reactions were estimated. Experimental data varied between 200 and 350 °C, a catalyst concentration of 2, 5, and 10 wt % and molar ratio (MeA:Oil) of 20:1, 40:1 and 60:1. Degradation reactions of glyceri...
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#1J.S. Ribeiro (UFSM: Universidade Federal de Santa Maria)H-Index: 4
#2Dian Celante (UFSM: Universidade Federal de Santa Maria)H-Index: 8
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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Abstract Glycerol excess in the market and high cost of common feedstock have encouraged the investigations of new technologies for biodiesel production. In this context, the use of macaw oil (Acrocomia aculeata) for biodiesel production through interesterification and esterification reactions with methyl acetate as acyl acceptor was evaluated, using heterogeneous catalyst γ-alumina (γ-Al2O3). Experiments were performed at different reaction temperatures (225–300 °C), catalyst contents (0–10% re...
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#1C. Alessio (UFSM: Universidade Federal de Santa Maria)H-Index: 1
#2J.S. Ribeiro (UFSM: Universidade Federal de Santa Maria)H-Index: 4
Last. Fernanda de Castilhos (UFSM: Universidade Federal de Santa Maria)H-Index: 19
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Abstract The aim of this study is to evaluate commercial niobium phosphate as heterogeneous catalyst in biodiesel production from oleic acid and low-cost raw materials using dimethyl carbonate as acyl receptor. Catalyst was characterized and textural and structural properties were obtained. Effect of temperature, molar ratio and catalyst concentration were investigated. At higher temperature conditions, higher FFA conversions were achieved. Molar ratio was not a significant factor to conversion ...
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