Reusable Heterogeneous SnO 2 /ZnO Catalyst for Biodiesel Production from Acidified/Acid Oils

Journal of the Brazilian Chemical Society

article

Dall’Oglio, Daiane F.¹  Moura, Carla V. R. de¹  Garcia, Marco A. S.³  Fiorio, Jhonatan L.⁴  Abreu, Wiury C. de⁵  Pereira, Laise N. S.⁶  Braga, Adriano⁴  Moura, Edmilson M. de¹  Guldhe, Abhishek⁷  Bux, Faizal⁷ 

[1] Departamento de Química, Universidade Federal do Piauí;Universidade Federal do Maranhão;Departamento de Química, Universidade Federal do Maranhão;Departamento de Química Fundamental, Universidade de São Paulo;Instituto Federal de Educação;Instituto Federal do Maranhão, Campus São Raimundo das Mangabeiras;Institute for Water and Wastewater Technology, Durban University of Technology

关键词: acid catalyst;    SnO2/ZnO;    Scenedesmus sp;    microalgae;    biodiesel;   

DOI  :  10.21577/0103-5053.20200167

学科分类：内科医学

来源: SciELO

【 摘 要 】

A catalyst comprised of SnO 2 impregnated on ZnO nanowires, which presented remarkable ability to catalyze fatty acid esterification/transesterification reactions, is reported. For optimization of reaction conditions, artificially acidified soybean oil with 10 wt.% oleic acid was used as a model feed. The optimized conditions were: 150 °C, 6 h, 5 g of oil, catalyst concentration of 5%, and methanol:oil molar ratio of 15:1. The catalyst achieved 92% of total fatty acid methyl esters (FAME) content and was used five times without the necessity of catalyst washing from one reaction to the other. Then, such conditions were applied to produce biodiesel from the oil extracted from Scenedesmus sp. microalgae; the system reached 72% of FAME content, without any previous refining or degumming process of the oil. Rietveld refinement, X-ray diffraction, elemental mapping in scanning transmission electron microscopy, X-ray photoelectron spectroscopy, and pyridine-desorption Fourier-transform infrared spectroscopy were used to characterize the material.

【 授权许可】

CC BY