Tungsten oxide supported on copper ferrite: a novel magnetic acid heterogeneous catalyst for biodiesel production from low quality feedstock

Abstract

This study aims to synthesize a WO3/CuFe2O4 catalyst through a wet impregnation method and use it as a new magnetic acid catalyst in the transesterification process of waste cooking oil (WCO).

Functionalized Biochar from the Amazonian Residual Biomass Murici Seed: An Effective and Low-Cost Basic Heterogeneous Catalyst for Biodiesel Synthesis

“…The observed value for the cold plugging point was 0.0 • C, indicating that the biodiesel synthesized in this study can be used in engines, even in regions of low temperatures. The flash point is the main aspect responsible for certifying the safety of a fuel because it indicates the amount of residual methanol present in the biodiesel [17,49]. The value obtained for the synthesized soybean biodiesel was 150 • C, a value very similar to that reported by Mares et al [8], which was 152 • C for biodiesel obtained using the ASA-800/4 catalyst under optimal reaction conditions.…”

“…In this scenario, several supports were investigated. These supports included ZrO 2 [15], SrFe 2 O 4 [16], CuFe 2 O 4 [17], TiO 2 [18], Na 2 Ti 3 O 7 [19], and SiO 2 [20]. The objective was to increase the dispersion of active phases on such supports, as well as increase the reuse capacity of these catalysts.…”

Preparation of core–shell catalyst for the tandem reaction of amino compounds with aldehydes

“…16 In recent years, scholars have favored multifunctional core-shell noble metal-based heterogeneous catalysts. [17][18][19][20][21] A noble metal is selected as an active site supported on a material that could not only act as catalyst site but also act as support as the catalyst core. And another material with high porosity and good stability is selected as the catalyst shell to design a core-shell catalyst for catalyzing the tandem reactions.…”