A facile preparation of hydroxylated magnesium fluorides as an active catalyst for biodiesel production: The effect of different aging times

Indrayanah, Sus; Marsih, I Nyoman; Kemnitz, Erhard; Murwani, Irmina Kris

doi:10.1016/j.matlet.2018.04.065

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…There are many challenges in designing the heterogeneous biodiesel catalysts such as diffusion resistance of great triglyceride molecules, specific surface area (SSA), and catalyst deactivation . Some of these problems could be solved by employing an appropriate catalytic support .…”

Section: Introductionmentioning

confidence: 99%

“…20,22 There are many challenges in designing the heterogeneous biodiesel catalysts such as diffusion resistance of great triglyceride molecules, specific surface area (SSA), and catalyst deactivation. [23][24][25] Some of these problems could be solved by employing an appropriate catalytic support. 13,26,27 MCM-41, with a significant surface area and mesoporous structure, is a good candidate for support that could be used in several cycles of reaction because of its thermal and mechanical stability.…”

Section: Introductionmentioning

confidence: 99%

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Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

2019

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Summary In present work, the aim of producing biodiesel from waste cooking oil was pursued by doping the cerium element into the MCM‐41 framework as catalyst with various Si/Ce molar ratio (5, 10, 25, 50, and Ce = 0). The catalytic performance and stability improved by employing the ultrasound irradiation in active phase loading step of catalyst preparation. The physicochemical characteristics of synthesized samples were investigated using various techniques as follows: Brunauer‐Emmett‐Teller (BET), X‐ray powder diffraction (XRD), Fourier transfer infrared (FTIR), energy‐dispersive X‐ray spectroscopy (EDX), transmission electron microscopy (TEM), and field emission scanning electron microscope (FESEM). The XRD patterns along with the results of FTIR and BET analysis revealed the MCM‐41 framework destruction while increasing the Ce content. The FESEM images of the nanocatalysts illustrated a well distribution and uniform morphology for the Ca/CeM (Si/Ce = 25). The particle size and size distribution of the Ca/CeM (Si/Ce = 25) were subsequently determined by TEM and FESEM images. The activity of fabricated nanocatalysts was evaluated by measuring the free acid methyl ester (FAME) content of produced biodiesel. The tests were carried out at constant operational conditions: T = 60°C, catalyst loading = 5 wt%, methanol/oil molar ratio = 9, and 6‐hour reaction time. A superior activity was observed for Ca/CeM (Si/Ce = 25) among other nanocatalysts with 96.8% conversion of triglycerides to biodiesel. The mentioned sample was utilized in five reaction cycles, and at the end of the fifth cycle, the conversion reached to 91.5% which demonstrated its significant stability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

2019

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“…Results showed that the agent time increasing caused increasing crystallinity and S BET but decreasing the biodiesel production performance. So, the highest biodiesel production (64.43%) was belonged to the catalyst preparation aging time of 1 h. 17 However, significant mass transfer limitation in biodiesel production through conventional processes has been reported, which is attributed to the mass transfer occurring at the interface between two liquid phases. 18,19 In this study, solid basis nanocatalysts were synthesized via the photochemical method by using Sr(NO 3 ) 2 as the active ingredient precursor on TiO 2 support that was synthesized by sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Supercritical microalgae conversion to biofuel and value‐added components (oxygenates, hydrocarbons, and aromatics): A catalyst characterization study

Aghilinategh,

Barati,

Hamadanian

2023

Env Prog and Sustain Energy

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The study aimed to investigate the use of SrO/TiO2 nano‐catalysts in the one‐pot production of valuable products (such as fatty acid methyl esters, oxygenates, hydrocarbons, and aromatics) from Chlorella vulgaris microalgae through a supercritical process. The research focused on examining the impact of the factors, the SrO to TiO2 ratio, preparation method, and calcination temperature on the catalytic performance. Two calcination temperatures (600°C and 850°C), two Sr:Ti molar ratios (1 and 2), and two catalyst preparation methods (photochemical and impregnation) were considered. The catalysts were characterized using Scanning electron microscopy, transmission electron microscope, x‐ray crystallography, and Brunauer‐Emmett‐Teller techniques. The evaluation of catalyst performance primarily focused on the production of value‐added products, particularly fatty acid methyl esters (FAMEs). The results indicated that the catalyst prepared using the photochemical method with a Sr:Ti molar ratio of 2 and calcined at 850°C exhibited superior performance in terms of FAMEs and oxygenates production. It was demonstrated that the catalyst prepared using the photochemical method with higher Sr:Ti ratio had better performances in the production of biodiesel.

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Eco-benign approach to produce biodiesel from neem oil using heterogeneous nano-catalysts and process optimization

Noreen

Khalid

Iqbal

et al. 2021

Environmental Technology & Innovation

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A facile preparation of hydroxylated magnesium fluorides as an active catalyst for biodiesel production: The effect of different aging times

Cited by 4 publications

References 8 publications

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Supercritical microalgae conversion to biofuel and value‐added components (oxygenates, hydrocarbons, and aromatics): A catalyst characterization study

Eco-benign approach to produce biodiesel from neem oil using heterogeneous nano-catalysts and process optimization

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