Heterogeneous Catalyst For Biodiesel Production Research Articles

Thermal Conversion of Coral Waste and its Utilization as Low-Cost Catalyst for Biodiesel Production

This study investigates the thermal conversion of waste coral and its utilization as a heterogeneous catalyst for biodiesel production from soybean oil. In this work, waste coral is calcined at varied temperatures of 800, 900, and 1000°C, and the effect of the calcination temperature on the physicochemical character of the solid is evaluated through Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and basicity measurement. The results show that the higher temperature facilitates the conversion of CaCO3 of the aragonite and calcite phases in raw waste coral into CaO, achieving a complete conversion at the temperature of 1000°C. Thermal conversion influences the increased surface basicity of the solid, which is associated with the higher activity for biodiesel production. Further studies on the obtained CaO as a catalyst demonstrate the catalyst dosage and the methanol-to-oil ratio as significant factors for fatty acid methyl ester production. The highest yield of 98.7% is achieved after a 3 hours reaction with 8 wt.% catalyst dosage and 9:1 methanol-to-oil ratio. The catalyst exhibits stability with an insignificantly decreased yield until the fifth usage cycle. The optimum conditions and reusability features of the calcined waste coral suggest that waste coral is a favorable CaO catalyst source for biodiesel production.

Catalytic evaluation of eggshell‐based calcium methoxide over Al2O3 for biodiesel generation from waste cooking oil

AbstractShell‐derived materials are promising heterogeneous catalysts for biodiesel production due to their nontoxic and renewable nature, but they have the disadvantage of being highly leachable. To overcome this issue, Ca(OCH3)2 formed through the reaction of CaO with methanol, and supported in turn on Al2O3 is proposed as a catalytic system for the transesterification of fresh soybean oil and waste cooking oil (WCO). First, catalysts with several Al/Ca molar ratios (0.2, 0.5, and 0.8‐AC), as well as their precursors (CaO and Al2O3) alone, were tested at 60 °C, catalyst loading 6% wt, methanol‐to‐oil molar ratio (MOR) 10, for 1 h for fresh oil, and 3 h for WCO. The 0.2‐AC catalyst generated the highest biodiesel yield for both oils. The optimum operating conditions for WCO transesterification, determined by using a univariable approach, were 60 °C, 9 wt% catalyst loading, MOR of 12.5, and a reaction time of 3 h. These improved conditions led to yields higher than 90% for pure CaO and the 0.2, 0.5, and 0.8‐AC catalysts. The density, kinematic viscosity, and refractive index of the biodiesel obtained were measured.

MILs as Heterogeneous Catalysts for Biodiesel Production

MILs as Heterogeneous Catalysts for Biodiesel Production

Catalytic Potential of Singgora Roof Tiles in Transesterification for Sustainable Biodiesel

The study centred around the uitilization of Singgora roof tiles as a heterogeneous catalyst in the production of biodiesel via the transesterification process. The motivation behind this choice stems from the non-recyclable nature of Singgora roof tiles and their potential applicability in biodiesel synthesis. To enhance the catalytic properties, zinc oxide (ZnO) is incorporated using the wet impregnation technique during catalyst preparation. The catalyst was characterized by XRF and SEM-EDX. A two-step transesterification method is employed to mitigate the levels of free fatty acid (FFA) in waste cooking oil (WCO). The initial step involves treating the WCO with sulfuric acid (H2SO4) to reduce FFA. Subsequently, the Singgora roof tiles catalyst is utilized in the second step. A high yield of FAMEs, specifically 96.96%, was achieved under the optimal conditions, which included a methanol-to- oil ratio of 12:1, a catalyst concentration of 1 wt.%, a reaction temperature of 65 °C, and a reaction time of 2 hours. The quality of the biodiesel produced was analyzed according to biodiesel standards such as ASTM D6751, EN 14214, and AOCS, and it met all the required standards. The study demonstrates the potential of using Singgora roof tiles as a heterogeneous catalyst in biodiesel production, offering a promising approach to repurposing non-recyclable materials and advancing sustainable biodiesel production methods.

Effectiveness of empty fruit bunch ash as the catalyst for palm oil transesterification

Empty Fruit Bunch (EFB) resulted from oil palm plantations and mills can be converted into ash through open combustion. The EFB ash then treated by simple calcination and used as a heterogeneous catalyst for biodiesel production. The characteristics of EFB ash were identified based on its elemental composition, porous structure, and active site size. The effectivity of the EFB ash as a catalyst was tested in a transesterification reaction of Refined Bleached Deodorized Palm Oil (RBDPO) with excess methanol (30 %-w) in various catalyst loads (in%-wt). The lab-scale experiments were conducted in a three-neck glass reactor, which was put on the hot plate stirrer at 450 rpm. The EFB ash performed the best as a catalyst by attaining optimal conversion at 65 °C for 1 h with a 16 %-wt of catalyst load. In this condition, most of the standard quality of biodiesel were complied with total glycerol under 0.24% and ester methyl contents up to 98.9 %. The characteristics tests showed that the properties and active side of the EFB ash are excellent after calcination at 600 for 5 h. The recyclability test of EFB ash as a catalyst showed high performance in two repetition cycles, each showing an increase in the yield of biodiesel, which was 92.21 % in cycle 2 and 91.23 % in cycle 3.

The Effect of Different Morphologies of ZnO and Cr Doped ZnO NPs as Heterogeneous Catalyst for Biodiesel Production from Soybean Oil

The Effect of Different Morphologies of ZnO and Cr Doped ZnO NPs as Heterogeneous Catalyst for Biodiesel Production from Soybean Oil

Optimization of biomass durian peel as a heterogeneous catalyst in biodiesel production using microwave irradiation

Abstract The present study investigated biodiesel production from the transesterification of palm oil with methanol using calcined biomass durian peel (BDP) as a heterogeneous catalyst assisted by microwave irradiation. Characterization of the calcined BDP showed that K2O is the main compound with a concentration of 86.15 wt%. The effect of three independent variables of catalyst weight (3–12 wt%), reaction time (1–10 min), and power of microwave (180–900 W) was used to determine the optimum condition on biodiesel production using the response surface method-based on the Box–Behnken design experiment. The optimum biodiesel conversion of 97.3% was achieved under experimental parameters of catalyst concentration of 12 wt%, reaction time of 9 min, and microwave power of 180 W. The catalyst concentration and reaction time have significant effects on biodiesel conversion.

A Review of the Development and Role of Heterogeneous Catalysts for Biodiesel Production

A Review of the Development and Role of Heterogeneous Catalysts for Biodiesel Production

Preparation of KI/KIO3/Methoxide Kaolin Catalyst and Performance Test of Catalysis in Biodiesel Production

Kaolin is a natural ingredient that is in abundance and has not been widely used. Kaolin is a source of silica (SiO2) and alumina (Al2O3) so that it can be used as a heterogeneous catalyst in biodiesel production. This research aims to examine the influence of using impregnated kaolin as a heterogeneous catalyst on production of biodiesel. Research methods include calcination of natural kaolin, impregnation of kaolin using KI, KIO3, and preparation of kaolin-methoxide in various concentrations, as well as biodiesel production using an impregnated kaolin catalyst. The catalyst was characterized using XRD and SEM. The catalyst was tested for basicity using the Hammet indicator method with acid-base titration. The biodiesel product obtained was analyzed using GCMS. The results of XRD analysis showed that 8% kaolin-methoxide catalyst had the highest crystallinity among the others. The crystallinity obtained was 87.84% with a composition of 15.79% SiO2 and 78.86% Al2O3. SEM image results also show a more visible crystal shape. The highest basicity of the catalyst obtained was 0.240 mmol. The highest biodiesel yield using 8% kaolin-methoxide catalyst is 99.48%.

Marigold (Tagetes) petals as a novel green bio-based heterogeneous catalyst for biodiesel production from palm oil

ABSTRACT Heterogeneous catalysts have an edge over homogeneous catalysts for the production of biodiesel due to limitations like nonrenewable nature, reusability, separation, saponification, equipment corrosion, and washing. The potential of marigold petals as an excellent bio-based catalyst was derived and utilized in the present study to produce sustainable palm oil methyl ester. The dried marigold petals are burned to produce ash, then calcined (800°C, 2 h) to prepare the catalyst. SEM, EDX, XRD, FTIR, TGA, and BET characterized the prepared calcined catalyst. The reported catalyst consists of a high percentage of potassium oxide and calcium oxide with a basic strength within 12.1<H_<18.4, and a surface area of 7.095 m2/g. The catalyst efficiency has shown effective conversion of palm oil into biodiesel with 96% yield under the optimum condition of 10:1 methanol to oil ratio, 6 wt.% catalysts, and temperature of 65°C in 180 min reaction time. GC-MS and 1H NMR methods verified the biodiesel. The obtained biodiesel meets the ASTM standards. The catalyst was utilized for four cycles without a significant decline in activity. The study revealed the potentiality of the novel green solid catalyst from marigold petals for biodiesel production with the capability to minimize overall production expenses.

Evaluating the Scale-Up Potential of Biogenic Heterogeneous Catalyst for Biodiesel Production

Evaluating the Scale-Up Potential of Biogenic Heterogeneous Catalyst for Biodiesel Production

Manufacturing Biodiesel from Cooking Oil Teaching Factory Products Using Bentonite Catalyst with Non-Alcohol Route Method

This research investigates an eco-friendly approach to biodiesel production through non-alcoholic pathways using heterogeneous catalysts. The study examines various ratios of methyl acetate to cooking oil and temperatures, revealing that the optimal conditions for biodiesel production are a 1:4 ratio, utilizing a bentonite catalyst (0.75 g), operating at 60°C for 120 minutes. Fourier Transform Infrared Spectroscopy (FTIR) analysis confirms the presence of ester groups, the primary component of biodiesel. Most biodiesel characteristics align with quality standards, including density (0.8844 kg/m3), cetane number (61.9), and acid number. However, the biodiesel flash point falls below the minimum standard, suggesting a potential area for improvement. This research underscores the potential of using methyl acetate as a heterogeneous catalyst for biodiesel production, with most biodiesel characteristics meeting established quality standards, although further work may be needed to address the flash point issue.

Zno Loaded Singgora Roof Tiles as Heterogeneous Catalyst for Waste Cooking Oil Biodiesel

This study aimed to utilize the waste cooking oil (WCO) into biodiesel using a novel waste Singgora roof tiles wet impregnated with zinc oxide (ZnO) as a heterogeneous catalyst. The motivation behind this choice stems from the non-recyclable nature of Singgora roof tiles and their potential applicability in biodiesel synthesis. The catalyst was characterized by X-ray Fluorescence (XRF) and scanning electron microscopy (SEM) with energy-dispersive X-ray diffractometer (EDX). A two-step transesterification method was employed to reduce the concentration of free fatty acids (FFA) in the WCO. The process started by treating the WCO with sulfuric acid (H2SO4) to diminish the levels of free fatty acid (FFA), followed by the utilization of the Singgora roof tiles catalyst in the subsequent step. A maximum yield of 96.96% biodiesel was obtained under the optimal conditions, which included a methanol-to- oil ratio of 12:1, a catalyst concentration of 1 wt.%, a reaction temperature of 65 °C, and a 2-hour reaction time. The quality of the biodiesel produced was analyzed according to biodiesel standards specified in the ASTM D6751, EN 14214, and AOCS, and were within the ranges. The study demonstrates the potential of using Singgora roof tiles as a heterogeneous catalyst in biodiesel production, offering a promising approach to repurposing non-recyclable materials and advancing sustainable biodiesel production methods.

The Regeneration of Dolomite as a Heterogeneous Catalyst for Biodiesel Production

Dolomite as a heterogeneous catalyst can be used in biodiesel synthesis. Process material costs can be reduced by regenerating and reusing the catalyst. Two methods of regeneration of dolomite were studied: (1) washing for 30 min with methanol, filtration, and washing for 30 min with hexane and (2) calcination at high temperature. Catalytic efficiency and catalyst changes after 1–6 cycles were evaluated. X-ray, FTIR, and SEM studies were performed. Calcination has been found to be a more effective method of catalyst regeneration than washing with solvents. The catalytic effectiveness of dolomite only slightly decreased over six application cycles. The results of the instrumental analysis showed that the structure and composition of the dolomite do not change during calcination after three cycles, while obvious changes in the structure of dolomite during catalyst washing were observed.

Magnetic graphene oxide supported tin oxide (SnO) nanocomposite as a heterogeneous catalyst for biodiesel production from soybean oil

In this study, the MGO@SnO as a new nanocatalyst with diverse chemical/physical properties was generated by the combination of graphene oxide covered with magnetic iron oxide (MGO) and tin oxide (SnO(x)) nanoparticles used for biodiesel production from soybean oil. Before GC-FID analysis, the nanostructured MGO@SnO was successfully employed to transesterify soybean oil to FAMEs (biodiesel). The proposed material was characterized using Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometer (EDX), X-ray diffraction (XRD), and vibrating sample magnetometer (VSM). Given the acidic-alkaline nature of the proposed catalyst, it has a strong probability of creating carbocation ions to attack with methanol and subsequently converting the triglycerides to methyl ester (FAMEs). In further experiments, it was found that the ideal reaction parameters were a ratio of MGO to SnO of 1:0.5, a molar ratio of soybean oil to methanol (MeOH) of 1:10, a reaction period of 180 min, and a reaction temperature of 120 °C. Furthermore, the MGO@SnO catalyst demonstrated adequate catalytic performance (>88 %) for transforming the triglycerides of soybean oil to FAMEs (biodiesel) as compared to pure SnO NPs (74 %) and plain MGO (69 %) at similar conditions.

Utilization of Musa acuminata blossom peel waste mediated heterogeneous catalyst for biodiesel production from sesame oil

The peel waste of the Musa acuminata blossom after fruit maturation was used for the preparation of a heterogeneous catalyst.

Biodiesel production through the transesterification of rapeseed oil over CaO‐MgO/SBA‐15 catalysts

AbstractDesigning a cost‐effective and environmentally friendly heterogeneous catalyst for biodiesel production is essential. To achieve this, new 0.3‐CaO‐MgO/SBA‐15 and 0.8‐CaO‐MgO/SBA‐15 catalysts were prepared by the impregnation method. The new 0.3‐CaO‐MgO/SBA‐15 catalyst had higher purity, larger surface area, and pore volume than 0.8‐CaO‐MgO/SBA‐15, resulting in great catalytic activity for biodiesel production by transesterification of rapeseed oil with methanol. A biodiesel yield of 97.8 wt % was attained under the optimal reaction conditions of 5 wt % catalyst concentration, 15:1 methanol/oil molar ratio, 95°C reaction temperature, and reaction time of 4 h. Most of the parameters and properties of the obtained biodiesel correspond to the EN 14212 standard. The 0.3‐CaO‐MgO/SBA‐15 catalyst could be considered a potential candidate for biodiesel production on industrial level application attributed to intriguing properties like cost‐effectiveness, ease of synthesis, and environmental greenness.

Process optimization and kinetic studies of Musa glauca catalyzed biodiesel production

In this study, a novel biomass catalyst was developed from Musa glauca stem ash as a clean catalyst for biodiesel production. For the first time, the potential of calcined Musa glauca stem ash was investigated as a heterogeneous catalyst for biodiesel production using soybean oil as a feedstock. The activity of both burnt and calcined Musa glauca catalysts in transesterification was studied. Calcination increased the catalytic activity more than open burning. The catalyst obtained by calcining Musa glauca stem at 500 °C was used as the optimum catalyst. This catalyst was exhaustively characterized using FT-IR, XRD, XPS, XRF, SEM, and BET surface area analyzer. The biodiesel production was optimized using response surface methodology (RSM) studies. A maximum of 96.7% biodiesel was produced using optimum reaction conditions of methanol to soybean molar ratio of 24:1, catalyst loading of 8 wt % (with respect to soybean oil) for 3 h at room temperature. The produced biodiesel was analyzed using nuclear magnetic resonance (NMR) and gas chromatography (GC) studies. The catalyst was reused and showed satisfactory reusability producing 80% of biodiesel in the 5th reaction cycle. The activation energy for the reaction was determined to be 27.71 kJ mol-1 from the kinetic study.

Facile Preparation of Bimetallic MOF-derived Supported Tungstophosphoric Acid Composites for Biodiesel Production

In this work, the novel TPA@C-NiZr-MOF catalyst is synthesized by the impregnation of tungstophosphoric acid (TPA) on the NiZr-based metal-organic framework (NiZr-MOF) followed by calcination up to 300 °C. The as-prepared catalyst materials were structurally, morphologically, and texturally characterized by XRD, FTIR, temperature programmed desorption of NH3 ( TPD-NH3 ), N2 physisorption, SEM, TEM, and XPS. The prepared catalyst can be used as an efficient heterogeneous catalyst for biodiesel production from oleic acid (OA) with methanol. The results indicated that, in comparison to TPA@NiZr-MOF, the TPA@C-NiZr-MOF catalyst calcined at 300 °C exhibits excellent catalytic performance probably owing to the synergistic effect between TPA and metal oxide skeletons, high acidity, as well as larger surface area and pore size. Additionally, the TPA@C-NiZr-MOF catalyst can be reused in up to six cycles with an acceptable conversion. This study showed that the bimetallic MOF-derived composite materials can be used as an alternative potential heterogeneous catalyst toward biorefinery applications.

Moroccan sardine scales as a novel and renewable source of heterogeneous catalyst for biodiesel production using palm fatty acid distillate

The continued growth in energy consumption, in concert with the depleting resources of fossil fuels and their detrimental effects on the environment, has required the exploration of substitute, renewable, and sustainable sources of energy. Biodiesel is one such alternative. In this current study, a heterogeneous sulfated catalyst based on Sardine scales was developed to improve biodiesel synthesis from palm fatty acid distillate (PFAD) through esterification. The catalyst was synthesized via a clean flash pyrolysis method with a thermal shock (950 °C) followed by a sulfonation process. The prepared catalyst was characterized by utilizing diverse methods, including XRD, FTIR, TGA/DSC, SEM/EDX, DLS, BET, and the Hammett test. The sulfated hydroxyapatite (HAPSS-SO4) catalyst demonstrated a maximum conversion of PFAD to biodiesel of 96.75% under optimal reaction conditions such as 3 wt% catalyst loading and 15:1 MeOH/PFAD molar ratio for 3 h at 70 °C. Additionally, the catalyst proved excellent stability, with the ability to regenerate for three cycles. The properties of the produced biodiesel are within the limits stipulated by international standards. The results of the molecular simulation demonstrate that the Lewis acid sites (Ca) are very susceptible to attack through the free fatty acid (FFA). The study proved the effectiveness of a sardine scale-derived catalyst (HAPSS-SO4) as a heterogeneous catalyst for biodiesel production.