Combustion synthesis of nanostructured calcium silicates: A new approach to develop bioceramic cements in endodontics

Abreu Betinelli, Giovane Augusto de; Modolon, Henrique Borba; Wermuth, Tiago Bender; Raupp-Pereira, Fabiano; Klegues Montedo, Oscar Rubem; Vassen, Anarela Bernardi; Demétrio, Kétner Bendo; Arcaro, Sabrina

doi:10.1016/j.ceramint.2023.11.191

Cited by 1 publication

(1 citation statement)

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“…The combustion reaction is considered a relatively simple, effective, and low-cost technique, widely established in the literature as a procedure used for the synthesis of various types of oxides [15][16][17] with applications in the production of biodiesel [18]. The innovative aspect of this work is in the consolidation of MoO 3 catalysts obtained through the combustion reaction, offering a significant contribution to studies on the optimization of the biofuel production process.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Biodiesel Production Process Using MoO3 Catalysts and Residual Oil: A Comprehensive Experimental 23 Study

Silva,

Pereira,

Sales

et al. 2024

Molecules

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The study aimed to utilize MoO3 catalysts, produced on a pilot scale via combustion reaction, to produce biodiesel from residual oil. Optimization of the process was conducted using a 23 experimental design. Structural characterization of the catalysts was performed through X-ray diffraction, fluorescence, Raman spectroscopy, and particle size distribution analyses. At the same time, thermal properties were examined via thermogravimetry and differential thermal analysis. Catalytic performance was assessed following process optimization. α-MoO3 exhibited a monophasic structure with orthorhombic phase, whereas α/h-MoO3 showed a biphasic structure. α-MoO3 had a larger crystallite size and higher crystallinity, with thermal stability observed up to certain temperatures. X-ray fluorescence confirmed molybdenum oxide predominance in the catalysts, with traces of iron oxide. Particle size distribution analyses revealed polymodal distributions attributed to structural differences. Both catalysts demonstrated activity under all conditions tested, with ester conversions ranging from 93% to 99%. The single-phase catalyst had a long life cycle and was reusable for six biodiesel production cycles. The experimental design proved to be predictive and significant, with the type of catalyst being the most influential variable. Optimal conditions included α-MoO3 catalyst, oil/alcohol ratio of 1/15, and a reaction time of 60 min, resulting in high biodiesel conversion rates and showcasing the viability of MoO3 catalysts in residual oil biodiesel production.

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