Biodiesel production from heterogeneous catalysts based K2CO3 supported on extruded γ-Al2O3

Silveira, Eurípedes Garcia; Pérez, Víctor Haber; Reyero, Inés; Serrano-Lotina, Ana; Justo, Oselys Rodríguez

doi:10.1016/j.fuel.2018.12.074

Cited by 81 publications

(40 citation statements)

References 49 publications

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“…Biodiesel derived from biological sources received extensive interest as it lowers the global reliance on petroleum products, the energy crisis, and pollution. 3,4 Various feedstocks including edible oils, 1,5,6 nonedible oils, 7,8 raw oils, 9 algae, [10][11][12] and animal fats, 13,14 as well as sundry of processing techniques, have been developed to produce high-quality biodiesel.…”

Section: Introductionmentioning

confidence: 99%

A facile noncatalytic methyl ester production from waste chicken tallow using single step subcritical methanol: Optimization study

et al. 2019

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Summary In this modern era, an increase in urbanization causes the escalating trend of fuel demand as well as environmental pollution problems. Various biofuels research with the respect of climate change and emission reduction recently intensifies, particularly in biodiesel. In Indonesia, diesel oil currently in use contains 20% of biodiesel. Utilizing waste‐based resources such as rendered chicken tallow as the feedstock could be the solution to both energy and environmental challenges. However, chicken tallow contains a significant amount of free fatty acid (FFA) which will obstruct the production yield of biodiesel. In this study, catalyst‐free subcritical methanol has been employed to convert waste chicken tallow (WCT) with high FFA into biodiesel. Design of experiment was conducted to study the effect of temperature, time, and the molar ratio of methanol to fats on the purity and recovery of fatty acid methyl esters (FAMEs). Based on the optimization study performed by response surface methodology (RSM), all three independent variables gave a significant effect on the recovery of FAME. From the experimental results, the maximum FAME yield obtained was 98.43 ± 0.22% with the optimum condition as follows: 167°C, 36.8 minutes, and 42.7:1 (methanol/WCT, mol/mol), while the predicted FAME yield obtained using RSM was 97.76%. The methyl ester composition of WCT‐based biodiesel ranges from C13 to C24.

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Section: Introductionmentioning

confidence: 99%

A facile noncatalytic methyl ester production from waste chicken tallow using single step subcritical methanol: Optimization study

et al. 2019

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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%

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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“…Base catalyzed reaction is much faster than acid catalyzed reaction giving maximum yield. The most commonly used catalysts are NaOH, KOH, NaOCH 3 , and KOCH 3 (Gardy et al, 2017;Silveira et al, 2019), operating under mild temperatures giving maximum yields (Gardy et al, 2019b). It also requires high-grade feedstock oil to minimize the saponification reaction making the process more cost consumptive.…”

Section: Types Of Catalysis Involved In Biodiesel Productionmentioning

confidence: 99%

Fabrication and Optimization of Nanocatalyst for Biodiesel Production: An Overview

et al. 2020

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Necessity and exploitation of fossil fuel products are implacable in serving the needs of humanity despite being a finite and limited resource. To meet the thrust of energy, biofuels derived from varieties of renewable resources are imperative in fulfilling the demand of renewable fuels on a large scale without creating environmental concerns. Biofuels are inevitably the result of the carbon fixation process which stores chemical energy, ultimately reducing the total amount of carbon dioxide. Different kinds of biofuels like bioethanol, biomethanol, biogas, and biodiesel are derived depending on varieties of feedstock materials. Among these, production of biodiesel augments the progression of clean and renewable fuel. In this review, we have discussed the production of biodiesel derived from various feedstock and using several processes like pyrolysis, direct blending, micro-emulsion, and trans-esterification, with critical discussion focussing on increasing biodiesel production using nanocatalysts. Biodiesel production mainly proceeds through homogenous and heterogeneous catalysis via trans-esterification method. The review further discusses the significance of nanocatalyst in heterogeneous catalysis based trans-esterification for large scale biodiesel production. With the advent of nanotechnology, designing and modification of nanocatalyst gives rise to attractive properties such as increased surface area, high thermal stability, and enhanced catalytic activity. The role of nanocatalysts have been extensively studied and investigated in regard to the increased biodiesel production. Along with the modification of nanocatalysts, we have briefly discussed the physico-chemical properties and the role of the optimization parameters as it plays a pivotal role in enhancing the biodiesel production commercially.

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Biodiesel production from heterogeneous catalysts based K2CO3 supported on extruded γ-Al2O3

Abstract: Extruded catalysts show efficient conversion of sunflower oil into biodiesel. The reaction achieved practically total conversion using 35%K 2 CO 3 /65%-Al 2 O 3 at 2h. After transesterification high-quality biodiesel was attained according ASTM/EN specifications. Highlights (for review)

Cited by 81 publications

References 49 publications

A facile noncatalytic methyl ester production from waste chicken tallow using single step subcritical methanol: Optimization study

A facile noncatalytic methyl ester production from waste chicken tallow using single step subcritical methanol: Optimization study

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

Fabrication and Optimization of Nanocatalyst for Biodiesel Production: An Overview

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