Enhanced conversion of dairy waste oil to biodiesel via novel and highly reactive UiO-66-NH2/ZnO/TiO2 nano-catalyst: Optimization, kinetic, thermodynamic and diesel engine studies

Maleki, Basir; Esmaeili, Hossein; Mansouri, Mohsen; Kumar, Dipesh; Singh, Bhaskar

doi:10.1016/j.fuel.2022.126901

Cited by 28 publications

(11 citation statements)

References 75 publications

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“…The band gap of photocatalysts can be specified through the UV-VIS absorption spectrum and applying Eq. 2 [44]:…”

Section: Analysis Of the Absorption Spectrum Of Biochar@zno-ce Nanoca...mentioning

confidence: 99%

“…where α is the absorption coefficient (cm -1 ), ℎ𝜗 is the photon energy (eV), A is the constant of the equation, and Eg is the energy of the band gap [43,44]. Through irradiating LED on the biochar@ZnO-Ce nanocatalysts, photons with an energy similar to or more than the band gap are absorbed, and it induces the stimulation of electrons from the valence band to the conduction band.…”

Section: Analysis Of the Absorption Spectrum Of Biochar@zno-ce Nanoca...mentioning

confidence: 99%

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Catalytic performance of ZnO-Ce nanoparticles decorated on biochar derived from Milkvetch for photocatalytic removal of reactive blue 19 dye

Jahani,

Maleki,

Mansouri

et al. 2023

Preprint

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In this work, the photocatalytic removal of reactive blue 19 (RB19) dye was investigated by employing ZnO-Ce nanoparticles decorated with biochar under LED irradiation. Synthesis of ZnO-Ce nanoparticles decorated with biochar was performed utilizing the co-precipitation procedure, and the texture and morphologyof the fabricated nanocomposite were analyzed using EDX, FESEM, XRD, TEM, BET, and FTIR techniques. Moreover, FESEM images demonstrated that ZnO-Ce nanoparticles were successfully decoratedon the surface of biochar. The specific surface areas of biochar and biochar@ZnO-Ce were 34.518 and 636.52 m2/g, respectively. To achieve the maximum yield in the removal of RB19 dye, the influence of operating variables including dye concentration, LED lamp power, biochar@ZnO-Ce catalyst dose, pH, and H2O2dose were explored. Besides, the maximum percentage of RB19 dye removal was 96.47% under optimal conditions, i.e. catalyst dosage of 100 mg, H2O2 dosage of 1 mL, pH of 9, initial dye concentration of 5 ppm, LED power of 50 W, and reaction time of 140 min. Also, the kinetic information revealed that the removal of RB19 dye was in accordance with the pseudo-first order kinetic model, and the reaction rate constant and correlation coefficient were determined to be 0.045 min− 1 and R2 = 0.990, respectively. Also, the recyclability of biochar@ZnO-Ce nanocatalysts was promising over five runs, and only 6.08% of RB19 dye removal efficiency decreased. Therefore, it can be concluded that the biochar@ZnO-Ce photocatalyst can be promisingly applied for the removal of azo dyes in the aqueous solutions.

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“…The band gap of photocatalysts can be specified through the UV-VIS absorption spectrum and applying Eq. 2 [44]:…”

Section: Analysis Of the Absorption Spectrum Of Biochar@zno-ce Nanoca...mentioning

confidence: 99%

Section: Analysis Of the Absorption Spectrum Of Biochar@zno-ce Nanoca...mentioning

confidence: 99%

Catalytic performance of ZnO-Ce nanoparticles decorated on biochar derived from Milkvetch for photocatalytic removal of reactive blue 19 dye

Jahani,

Maleki,

Mansouri

et al. 2023

Preprint

Self Cite

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“…The stability and retrievability of the UiO-66-NH 2 /ZnO/TiO 2 nanocatalyst were also assessed during consecutive transesterification processes, demonstrating its high performance with a conversion of 90.14 % during the seventh consecutive run. [26] In another recent study, a new catalyst consisting of cobalt oxide (Co 3 O 4 ) nanoparticles decorated with reduced graphene oxide (rGO) was developed for microwave-assisted biodiesel production. The catalyst exhibited exceptional efficiency, achieving a maximum biodiesel yield of 98.04 % using A. squamosa oil at an oil-to-methanol molar ratio of 1 : 12.75, a Co 3 O 4 @rGO loading of 1.53 wt %, a microwave time of 7.17 min, and a stirring speed of 512 rpm.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction has a positive Gibbs free energy of 88.9 kJ mol −1 , making it nonspontaneous, and an endothermic enthalpy value of 46.0 kJ mol −1 . The stability and retrievability of the UiO‐66‐NH 2 /ZnO/TiO 2 nanocatalyst were also assessed during consecutive transesterification processes, demonstrating its high performance with a conversion of 90.14 % during the seventh consecutive run [26] …”

Section: Introductionmentioning

confidence: 99%

Investigation of Jatropha Oil Transesterification into Methyl Esters under Supercritical Methanol Environment using Advanced Heterogeneous Catalysts

Demir,

Akgün

2024

ChemistrySelect

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The rationale for this study lies in the investigation of the transesterification of crude Jatropha curcas oil into biodiesel using advanced heterogeneous catalysts under supercritical methanol conditions. The oxides of strontium, lanthanum, and zinc (SrO, La2O3, and ZnO) were synthesized with varying loadings (2 wt %, 6 wt %, and 10 wt %) on γ‐Al2O3 using the wet impregnation method followed by calcination at 900 °C. To gain a comprehensive understanding of the prepared catalysts, multiple analytical techniques were employed, including scanning electron microscopy (SEM) with energy‐dispersive X‐ray spectroscopy (EDS), Brunauer‐Emmett‐Teller (BET) surface area analysis, X‐ray diffraction (XRD), and Fourier transform infrared (FT‐IR) spectroscopy. The performance of the catalysts was assessed through the measurement of biodiesel yield, where the SrO/γ‐Al2O3, ZnO/γ‐Al2O3, and La2O3/γ‐Al2O3 systems produced yields of 97.54 %, 97.49 %, and 97.36 %, respectively, under identical reaction conditions of a 1 : 40 oil to methanol molar ratio, 10 wt % catalyst loading amount, 300 °C reaction temperature, 90 bar reaction pressure, and a reaction time of 3 min. Despite a minimal decrease of 0.05 %, zinc oxide catalysts remain highly attractive due to their favorable price position compared to strontium. Additionally, the catalyst can be reused up to 12 times with minimal loss in biodiesel yield (~2 %).

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“…Due to the high degree of coordination between the organic ligand and the metal cluster, UiO‐66 is envisaged as a highly stable crystalline porous solid support. Like, for example, acidic ionic liquid grafted NH 2 ‐UiO‐66, 28 ZrSiW/UiO‐66, 29 UiO‐66‐NH 2 /ZnO/TiO 2 , 30 sulfonic acid‐functionalized(‐SO 3 H) UiO‐66, 31 and so forth, have been used as solid support for various reactions.…”

Section: Introductionmentioning

confidence: 99%

Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

Kalita,

Bharali,

Chetia

et al. 2024

Biofuels Bioprod Bioref

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Biodiesel has recently emerged as a renewable and environmentally benign fuel substitute for fossil‐derived energy sources. The use of heterogeneous solid catalysts for the generation of biodiesel from biomass‐derived fats and oils is sustainable. Among various reported catalyst supports, metal–organic frameworks (MOFs) have been popular choices for enhancing catalytic activity for biodiesel synthesis because of several outstanding features including porosity, high surface area, adjustable structures, and uniform pore sizes. In this research, the authors synthesized a novel nanocomposite of MOF‐supported hydroxyapatite (UiO‐66@HAp) using a facile impregnation technique and the characterization of the as‐synthesized catalyst was performed by different spectroscopic methods including powder X‐ray diffraction (PXRD), Fourier transform infrared (FTIR), X‐ray photoelectron spectroscopy (XPS), field emission gun‐scanning electron microscope (FEG‐SEM), energy dispersive X‐ray spectroscopy (EDS), high resolution transmission electron microscopy (HR‐TEM), thermogravimetric analysis (TGA), and N2 adsorption–desorption techniques. After successful synthesis, the catalytic property of the prepared material was evaluated in the palm oil transesterification into biodiesel. Product formation was confirmed by the 1H nuclear magnetic resonance (NMR) spectroscopy, 13C NMR, FTIR, and gas chromatography–mass spectrometry (GC–MS) of the biodiesel. The influence of different reaction variables such as catalyst dosage, methanol/oil molar ratio, temperature of the reaction, and reaction time was also studied. The outcomes revealed that the maximum biodiesel yield (∼97%) was obtained when 6 wt% catalyst was used with a 6:1 ratio of methanol/oil at 70 °C for 1 h. It was also observed that, even after 5 cycles of reuse, the catalyst was capable of producing significant amounts of biodiesel (over 90%). The results suggest that the synthesized novel catalyst holds a promising future in the sustainable production of biodiesel.

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Enhanced conversion of dairy waste oil to biodiesel via novel and highly reactive UiO-66-NH2/ZnO/TiO2 nano-catalyst: Optimization, kinetic, thermodynamic and diesel engine studies

Cited by 28 publications

References 75 publications

Catalytic performance of ZnO-Ce nanoparticles decorated on biochar derived from Milkvetch for photocatalytic removal of reactive blue 19 dye

Catalytic performance of ZnO-Ce nanoparticles decorated on biochar derived from Milkvetch for photocatalytic removal of reactive blue 19 dye

Investigation of Jatropha Oil Transesterification into Methyl Esters under Supercritical Methanol Environment using Advanced Heterogeneous Catalysts

Metal–organic framework‐supported hydroxyapatite (UiO‐66@HAp): an efficient catalyst for the microwave‐assisted transesterification of palm oil

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