Reusable Heterogeneous SnO2/ZnO Catalyst for Biodiesel Production from Acidified/Acid Oils

Dall'Oglio, Daiane F.; Garcia, Marco Aurélio Suller; Fiorio, Jhonatan Luiz; Abreu, Wiury Chaves de; Pereira, Luciana Patrícia Lima Alves; Braga, Adriano H.; Moura, Edmílson Miranda de; Guldhe, Abhishek; Bux, Faizal; Moura, Carla Verônica Rodarte de

doi:10.21577/0103-5053.20200167

Cited by 7 publications

(4 citation statements)

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“…of 1021.4 and 1044 eV, ascribed for Zn 2p 3/2 and Zn 2p 1/2 of Zn 2+ , respectively (Fig. 6 B) [ 39 ]. For the same sample, we display the C 1s spectrum (Fig.…”

Section: Resultsmentioning

confidence: 99%

Zn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors

Ribeiro,

de Lima,

Santos

et al. 2023

Discover Nano

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MnOx-based nanomaterials are promising large-scale electrochemical energy storage devices due to their high specific capacity, low toxicity, and low cost. However, their slow diffusion kinetics is still challenging, restricting practical applications. Here, a one-pot and straightforward method was reported to produce Zn-doped MnOx nanowires with abundant defects and tunable small cross-sections, exhibiting an outstanding specific capacitance. More specifically, based on a facile hydrothermal strategy, zinc sites could be uniformly dispersed in the α-MnOx nanowires structure as a function of composition (0.3, 2.1, 4.3, and 7.6 wt.% Zn). Such a process avoided the formation of different crystalline phases during the synthesis. The reproducible method afforded uniform nanowires, in which the size of cross-sections decreased with the increase of Zn composition. Surprisingly, we found a volcano-type relationship between the storage performance and the Zn loading. In this case, we demonstrated that the highest performance material could be achieved by incorporating 2.1 wt.% Zn, exhibiting a remarkable specific capacitance of 1082.2 F.g−1 at a charge/discharge current density of 1.0 A g−1 in a 2.0 mol L−1 KOH electrolyte. The optimized material also afforded improved results for hybrid supercapacitors. Thus, the results presented herein shed new insights into preparing defective and controlled nanomaterials by a simple one-step method for energy storage applications.

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“…of 1021.4 and 1044 eV, ascribed for Zn 2p 3/2 and Zn 2p 1/2 of Zn 2+ , respectively (Fig. 6 B) [ 39 ]. For the same sample, we display the C 1s spectrum (Fig.…”

Section: Resultsmentioning

confidence: 99%

Zn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors

Ribeiro,

de Lima,

Santos

et al. 2023

Discover Nano

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show abstract

“…These catalysts are easily separable from the reacting system and reducing purification cost and process time. Recently in 2021, metal oxide based nanocatalysts such as Cu–Ni doped ZrO 2 , Cellulose/α‐Fe 2 O 3 –ZrO 2 , Eggshell‐derived CaO, CaO/CeO 2 , Na‐SiO 2 /CeO 2 , WO 3 ‐Zr 2 O 3 /CaO, ZnO, SnO 2 /ZnO, Fe/CuO, and Fe 3 O 4 have been successfully utilized in the conversions of renewable triglyceride resources into biodiesel 137–145. Tab.…”

Section: Current Studies and Future Aspectsmentioning

confidence: 99%

Advances in Metal Oxide‐based Nanocatalysts for Biodiesel Production: A Review

et al. 2023

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The demand for renewable fuels has risen as a result of increasing human population, urbanization, industrialization, and transport systems. Biodiesel production using metal oxide-based heterogeneous catalysts is an efficient, sustainable, and environmentally friendly approach. Because of their recovery, reusability, and consistency, heterogeneous catalysts may be preferable to homogeneous catalysts. Since the last few decades, the metal oxides of alkali earth and transition metals and their composite materials have been used as nanocatalysts in the production of biodiesel fuel. Utilization of inorganic metal oxide nanoparticles (MONPs) and their composite materials in producing biodiesel has gained increased attention because of their advanced physical and chemical characteristics. In this review, the applicability of metal oxides and their nanocomposite-based catalysts in biodiesel production, transesterification reactions with nanocatalytic systems, and the important parameters that affect these reactions are discussed.

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“…However, when www.nature.com/scientificreports/ the molar ratio was increased to 30, the conversion decreased somewhat. Lower conversion may be caused by partial blocking of the catalyst's active sites due to an overabundance of methanol 50 . The esterification reactions are reversible in nature, so additional alkyl donors are required with respect to oleic acid to reach a conclusion.…”

Section: Esterification Reactionsmentioning

confidence: 99%

Microwave-assisted synthesis of biodiesel by a green carbon-based heterogeneous catalyst derived from areca nut husk by one-pot hydrothermal carbonization

Yadav

Ahmaruzzaman

2022

Sci Rep

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In this study, we have synthesized a solid acid catalyst by areca nut husk using low temperature hydrothermal carbonization method. The fabricated catalyst has enhanced sulfonic actives sites (3.12%) and high acid density (1.88 mmol g−1) due to –SO3H, which are used significantly for effective biodiesel synthesis at low temperatures. The chemical composition and morphology of the catalyst is determined by various techniques, such as Fourier transform infrared (FTIR), powder X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), Scanning electron microscope (SEM), Energy disruptive spectroscopy (EDS), Mapping, Thermogravimetric analysis (TGA), CHNS analyzer, Transmission electron microscopy (TEM), particle size analyzer, and X-ray photoelectron spectroscopy (XPS). Acid–base back titration method was used to determine the acid density of the synthesized material. In the presence of the as-fabricated catalyst, the conversion of oleic acid (OA) to methyl oleate reached 96.4% in 60 min under optimized conditions (1:25 Oleic acid: methanol ratio, 80 °C, 60 min, 9 wt% catalyst dosage) and observed low activation energy of 45.377 kJ mol−1. The presence of the porous structure and sulfonic groups of the catalyst contributes to the high activity of the catalyst. The biodiesel synthesis was confirmed by gas-chromatography mass spectrometer (GC–MS) and Nuclear magnetic resonance (NMR). The reusability of the catalyst was examined up to four consecutive cycles, yielding a high 85% transformation of OA to methyl oleate on the fourth catalytic cycle.

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Reusable Heterogeneous SnO2/ZnO Catalyst for Biodiesel Production from Acidified/Acid Oils

Cited by 7 publications

References 0 publications

Zn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors

Zn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors

Advances in Metal Oxide‐based Nanocatalysts for Biodiesel Production: A Review

Microwave-assisted synthesis of biodiesel by a green carbon-based heterogeneous catalyst derived from areca nut husk by one-pot hydrothermal carbonization

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