Low Cost Heterogeneous Catalyst Research Articles

Constructing Co@C nanoparticles with chainmail-structure for highly efficient hydroformylation of 1-hexene

Constructing highly active noble-metal-free heterogeneous catalysts is the crux for the hydroformylation of long-chain α-olefins. Herein, novel chainmail-structured cobalt oxide nanoparticles (CoO@C|SBA-15) are fabricated by the channel confinement strategy, which display excellent activity for the 1-hexene hydroformylation. Specifically, the obtained catalyst shows 100% 1-hexene conversion and 94% heptanal selectivity, as well as up to 2.0 linear to branch (l/b) ratio, outperforming most of heterogeneous noble metal catalysts. Remarkably, in-situ DRIFT spectra combined with density functional theory calculations disclosed the metallic Co derived from in-situ reconstruction of CoO is the key active site for 1-hexene hydroformylation. Specifically, the reconstructed Co site is responsible for the adsorption of 1-hexene, and the graphite carbon layer promotes the adsorption of H2 and CO by interacting with the reconstructed Co. Moreover, the graphite carbon layer provides a strong protective effect on the internal cobalt active sites and thus enhances the catalytic stability during the harsh condition. This work provides a new method for designing the low-cost heterogeneous catalyst and emphasizes the intrinsic active sites for 1-hexene hydroformylation reaction.

Characterization, Application and Optimization of Low Cost Heterogeneous Catalyst in the Production of Biodiesel Using Waste Vegetable Frying Oil

Characterization, Application and Optimization of Low Cost Heterogeneous Catalyst in the Production of Biodiesel Using Waste Vegetable Frying Oil

Tuning the Catalytic Activity of Covalent Metal-Organic Frameworks for CO2 Cycloaddition Reactions.

The development of efficient, recyclable and low-cost heterogeneous catalysts for conversion of carbon dioxide (CO2 ) into epoxides is highly desired, yet remain a challenge. Herein, we have prepared three two-dimensional (2D) copper(I) cyclic trinuclear units (Cu(I)-CTUs) based covalent metal-organic frameworks (CMOFs), namely JNM-13, JNM-14, and JNM-15, via a one-pot reaction by combination of coordination and dynamic covalent chemistry. Among them, JNM-15 contained the highest density of copper catalytic sites, and exhibited the highest capacity for adsorption of CO2 . More interestingly, JNM-15 delivered the highest catalytic activity for cycloaddition of CO2 to epoxides with good yields (up to 99 %), good substrate compatibility (11 examples) and reusability (four catalytic cycles) under mild condition.

Efficient removal of aromatic pollutants via catalytic wet peroxide oxidation over synthetic anisotropic ilmenite/carbon nanocomposites

As one of the most common ferrous (Fe2+)-containing oxide minerals in the Earth’s crust, ilmenite (FeTiO3) is a potential low-cost heterogeneous Fenton-like catalyst for organic wastewater treatment via catalytic wet peroxide oxidation (CWPO). However, it suffers from low activity and long induction time. Herein anisotropic FeTiO3/C nanocomposite with rich Fe2+ ions on large surface area of 159.0 m2 g−1 (surface Fe/Ti and Fe2+/Fe3+ ratios were respectively 2.1 and 2.0) was prepared via cetyltrimethylammonium (CTA+)-assisted sol-gel synthesis. CTA+ modulated the growth of FeTiO3 nanoparticles with more exposed metallic sites by preferential adsorption on its (104) plane via electrostatic attraction, provided the carbon source and facilitated the generation of more Fe2+ ions at the interface of FeTiO3/C via carbothermal reduction of FeTiO3. FeTiO3/C efficiently catalyzed CWPO removal of six aromatic pollutants with different charges (25 mg L−1 each) at 25 oC and pH 3.0 without an induction period owing to rich Fe2+ content on neutral surface (pHpzc ~3.3)—three dye solutions completely decolorized in 1 h and three antibiotics degraded by >90% in 3 h. Reusability of FeTiO3/C was demonstrated with cationic rhodamine B and anionic orange G dyes in five consecutive runs. Scavenging tests and spin-trapping EPR spectra confirmed the generation of dominant ·OH and minor O2•− species for organic degradation via catalytic decomposition of H2O2 on FeTiO3/C as a heterogeneous Fenton-like catalyst.

Enhanced catalytic activities of natural iron ore in peroxymonosulfate activation assisted by WS2 for rapid degradation of pollutants

The seek for efficient and low-cost heterogeneous catalysts for peroxymonosulfate (PMS) activation holds great promise in the treatment of organic contaminants. Natural iron ore (IO) has been identified as a potential catalyst due to its low environmental risk and cost-savings. Herein, the commercial tungsten sulfide (WS2) was employed to significantly enhance the performance of IO towards PMS activation (WS2/IO/PMS) for the removal of pollutants. This system demonstrated remarkable performance, with >98.2% removal of organic pollutants in 60 min, including dyes and antibiotics, under the optimized conditions of 0.50 g/L IO, 0.10 g/L WS2, 2.0 mM PMS, and initial pH 6.0. The apparent degradation rate constant (k) of Acid Orange 7 (AO7) in WS2/IO/PMS system (0.073 min−1) was about 30.4-fold and 104.3-fold higher than that of in WS2/PMS system (0.0024 min−1) and IO/PMS system (0.0007 min−1), respectively. Mechanism insights revealed the crucial role of WS2 in boosting the degradation kinetics in the WS2/IO/PMS system. The exposed W4+ or S2− species on WS2 surface were the dominant reactive sites responsible for the promotion of Fe3+/Fe2+ redox cycles and subsequently the PMS activation. Importantly, the electrochemical analysis demonstrates that the iron ions released from IO were prone to adsorb onto the WS2 surface, forming active Fe species with high oxidative potential, which remarkably accelerated the electron transfer for Fe2+ regeneration, thereby enhancing PMS activation to generate reactive oxygen species like hydroxyl radicals (OH), sulfate radicals (SO4−) and superoxide radicals (O2−). Furthermore, the practicability of WS2/IO/PMS system was validated by treating various pollutants and investigating the interference of coexisting anions in water. Overall, this study provides a green and advanced strategy to enhance the PMS activation by natural iron ore for efficient water decontamination.

Charcoal-based block catalyst boosts peroxymonosulfate activation for ciprofloxacin degradation

Developing high-performance and low-cost heterogeneous catalyst is an urgent need to activate peroxymonosulfate (PMS) towards organic pollutants degradation. Herein, a novel block catalyst comprising of iron oxide nanosheets and wood carbon (FeOX@WC) is proposed to enhance PMS activation for ciprofloxacin (CIP) degradation. The resultant FeOX@WC achieved the removal rate of 86.6% in 10 min. This hardwood-derived catalyst remained the excellent degradation performance in a wide pH range of 2.0–11.0 and the co-existence of other organic pollutants. Inspired by water circulation pathway in tree, a flowthrough degradation device was constructed via using the hardwood-derived carbon block with large vessel channels and small fiber tracheids channels in diameter. The removal rate reached 75.4% in 17 min for mass pollution solution (450 mL), suggesting the good degradation ability in practical application. Quenching experiments, electron paramagnetic resonance and electrochemical analysis reveal that non-radical pathways including singlet oxygen and electron transfer occupy the dominant effect. Nine intermediates were identified and three kinds of degradation pathways were proposed. This work provides a charcoal-based block catalyst to enhance the degradation efficiency towards aqueous CIP pollutants.

Application of pharmaceutical waste as a heterogeneous catalyst for transesterification of waste cooking oil: biofuel production and its modeling using predictive tools

In this study, for the first time, pharmaceutical waste was used as a heterogeneous catalyst to produce biofuel from waste cooking oil (WCO). An efficient and low-cost heterogeneous catalyst was prepared from waste tablets of calcium carbonate (CaCO3) and magnesium oxide (MgO). A certain amount of alumina nanoparticles (Al2O3) was added to the pharmaceutical waste to participate in the transesterification of the WCO, which positively affected mass yield. The mentioned catalysts were identified by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), field-emission scanning electron microscopy (FESEM), and Brunauer–Emmett–Teller (BET) analyses. According to the BET analysis, the specific surface of the catalysts increased. Also, the effects of various reaction parameters such as temperature, time, catalyst loading, and the oil: methanol ratio were investigated and optimized by response surface methodology (RSM). Furthermore, an adaptive neuro-fuzzy inference system (ANFIS) was coupled with a firefly optimization algorithm to predict biofuel yield. Under optimum conditions (Al2O3 0.952 wt%, catalyst 4.978wt%, oil:methanol ratio 0.5 vol:vol, reaction time 120 min, and reaction temperature 69.6 °C), the mass yield of MgO and CaO catalysts was 95.6 and 90.4 wt%, respectively. The composition of biofuel was identified using gas chromatography–mass spectrometry (GC-MS).

Enhanced performance of glycerol electro-oxidation in alkaline media using bimetallic Au-Cu NPs supported by MWCNTs and reducible metal oxides.

Electrochemical technologies for valorizing glycerol, a byproduct of biodiesel production, into electric energy and value-added chemical products continue to be technologically and economically challenging. In this field, an ongoing challenge is developing more active, stable, and low-cost heterogeneous catalysts for the glycerol electro-oxidation reaction (GlyEOR). This paper reports the influence of the preparation procedure, which involves intermatrix synthesis (Cu and Au NPs), followed by galvanic displacement (Cu-Au NPs) in previously functionalized multi-walled carbon nanotubes (MWCNTs). It also discusses the role of the supports, CeO2 NPs, and TiO2 NPs, obtained by a hydrothermal microwave-assisted procedure, on the electroactivity of a hybrid bimetallic Cu-Au/MWCNT/MO2 catalyst in the GlyEOR in alkaline media. The electrocatalytic behavior was studied and discussed in terms of structure, composition, and electroactivity of the synthesized materials, which were determined by Fourier-transform infrared spectroscopy (FTIR), flame atomic absorption spectroscopy (FAAS), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), X-ray photoelectronic spectroscopy (XPS), and cyclic voltammetry (CV). In addition, the role of the oxidation states of Cu and Au in the as-prepared catalysts (Cu/MWCNT, Au/MWCNT, Cu-Au/MWCNT, Cu-Au/MWCNT-CeO2, and Cu-Au/MWCNT-TiO2) was demonstrated. It was concluded that the preparation method of metal NPs for the controlled formation of the most catalytically active oxidation states of Cu and Au, together with the presence of a conductive and oxophilic microenvironment provided by carbon nanotubes and facile reducible oxides in optimized compositions, allows for an increase in the catalytic performance of synthesized catalysts in the GlyEOR.

Insight into the Recent Advances in Sustainable Biodiesel Production by Catalytic Conversion of Vegetable Oils: Current Trends, Challenges, and Prospects

Recently, numerous advances were reported in the creation of efficient and low-cost heterogeneous catalysts for the transesterification reactions of triglyceride molecules to decrease the overall cost of biofuel production. The heterocatalytic transesterification process has been recognized to be the most emerging approach in biodiesel synthesis as a result of its ease of use and low price. The unique characteristics of seven different kinds of heterogeneous catalysts, containing heteropolyacid, zeolite-based catalyst, layered-double-hydroxide-based catalyst, graphene, graphene oxide, activated carbon, biomass and non-biomass waste materials, and finally metal- and metal-oxide-based catalysts that are frequently employed in current biodiesel research, have undergone extensive studies. The emphasis is on multipurpose catalysts, which have high catalytic efficiency and low production cost because they create biofuel that is more applicable, effective, and eco-friendly. This review highlighted significant factors affecting the efficiency of heterogeneous catalysts, discussed the reaction parameters that affect biofuel production from various vegetable oil feedstocks, also mentioned the reaction mechanism of biodiesel production using heterogeneous catalysts, and last debated process opportunities and challenges that could stimulate future exploration.

Response surface optimisation of biodiesel synthesis using biomass derived green heterogeneous catalyst

Although homogeneous alkali-catalysed transesterification is the typical process used in biodiesel production, it caused complications in downstream separation processes and an oversupply of glycerol as a by-product. The present work studied the synthesis of a novel sulfonated biomass-derived solid acid catalyst and its application in biodiesel production via interesterification of oleic acid. Solid acid catalysts were prepared by direct sulfonation via thermal treatment with concentrated sulfuric acid. The design of experiments was conducted via four-factors central composite design (CCD) coupled with response surface methodology (RSM) analysis. The parameters considered for optimisation included carbonisation and sulfonation temperatures, catalyst loading and reaction time, each varied at five levels. The maximum yield of fatty acid methyl ester (FAME) was obtained using optimum parameters as carbonisation temperature of 586 °C, sulfonation temperature of 110 °C, catalyst loading of 10.5 wt.% and reaction time of 7 h was 54.3 % based on the theoretical ester formation. A quadratic mathematical model in RSM was successfully established that can make effective predictions about the anticipated biodiesel yield. This study proved that the low-cost heterogeneous catalyst derived from biomass waste with a simple production route could catalyse the interesterification process under moderate process conditions.

Recent Insight in Transition Metal Anchored on Nitrogen-Doped Carbon Catalysts: Preparation and Catalysis Application

The design and preparation of novel, high-efficiency, and low-cost heterogeneous catalysts are important topics in academic and industry research. In the past, inorganic materials, metal oxide, and carbon materials were used as supports for the development of heterogeneous catalysts due to their excellent properties, such as high specific surface areas and tunable porous structures. However, the properties of traditional pristine carbon materials cannot keep up with the sustained growth and requirements of industry and scientific research, since the introduction of nitrogen atoms into carbon materials may significantly enhance a variety of their physicochemical characteristics, which gradually become appropriate support for synthesizing supported transition metal catalysts. In the past several decades, the transition metal anchored on nitrogen-doped carbon catalysts has attracted a tremendous amount of interest as potentially useful catalysts for diverse chemical reactions. Compared with original carbon support, the doping of nitrogen atoms can significantly regulate the physicochemical properties of carbon materials and allow active metal species uniformly dispersed on the support. The various N species in support also play a critical role in accelerating the catalytic performance in some reactions. Besides, the interaction between support and transition metal active sites can offer an anchor site to stabilize metal species during the preparation process and then improve reaction performance, atomic utilization, and stability. In this review, we highlight the recent advances and the remaining challenges in the preparation and application of transition metal anchored on nitrogen-doped carbon catalysts.

Mussel shell based CaO nano-catalyst doped with praseodymium to enhance biodiesel production from castor oil

This research presents the preparation and application of mussel shell based CaO doped with praseodymium as catalysts labelled as 3, 5, 7, 9 & 11 wt% for biodiesel production through transesterification reaction from castor oil. Pr-CaO catalysts were synthesized successfully using wet chemistry route and further used as a stable, active, and low-cost heterogeneous catalyst for environmentally benign and green biodiesel production through transesterification of castor oil and methanol. The characterization of catalysts was done using X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Raman and Scanning electron microscopy (SEM). The SEM micrographs depicted the flower like morphology of 7 % Pr doped catalyst with an average crystallite size of < 16 nm and thermal stability below 900 °C. Catalyst testing was done according to ASTM standards for castor oil biodiesel production and found to be within specifications. The obtained catalyst exhibited high catalytic activity for biodiesel production through transesterification of castor oil and methanol. A fatty acid methyl ester (FAME) yield of 87.42 % was obtained through 7 % Pr-CaO mixed oxide catalyst at optimum reaction conditions (i.e., 2.5 wt% catalyst, methanol to oil ratio of 8:1 and 65 °C) while the yield of FAME obtained through undoped, calcined CaO was about 80 %.

Synthesis of Ca–Fe-based heterogeneous catalyst from waste shells and their application for transesterification of Jatropha oil

The depletion of fossil fuel reserves with increased fuel demand and global emissions has increased the search for eco-friendly renewable fuels with a low environmental impact. Biodiesel can be considered as mono-alkyl esters of long-chain fatty acids obtained from the transesterification of vegetable oils and animal fats. Economically low-cost biodiesel production has received considerable interest for blending with fossil-based diesel for a more sustainable future. Therefore, the current study focuses on synthesizing an efficient, low-cost heterogeneous CaO catalyst from waste egg and seashell using a solid-state method and applying it to the transesterification of Jatropha oil. The Ca2Fe2O5 solid catalyst was prepared by doping calcined CaO with iron in a 2:1 ratio using ferric oxide (Fe2O3). Furthermore, the catalyst was extruded and analytically characterized using XRD, FT IR, BET, and its basic strength was quantified by Hammett indicators. Later on, transesterification of Jatropha oil was optimized by varying reaction parameters, such as the molar ratio of methanol to Jatropha oil, reaction time, and catalyst loading. The maximum conversion yield was 96.3% at a 20:1 methanol-to-oil ratio and 80 bar N2 pressure using 5% (w/w) catalyst loading. Furthermore, the catalytic recycling study demonstrated that the Ca2Fe2O5 catalyst could retain > 70–80% of transesterification efficiency and stability up to 4 cycles under high acid value and moisture conditions.Graphical abstract

Production of biodiesel from marine green seaweed using a renewable low-cost heterogeneous catalyst

In this study, the biodiesel produced from Ulva lactuca, a marine green seaweed by solid oxide catalyst derived from low-cost waste eggshells is evaluated. Waste eggshells were calcined at 500 °C, 600 °C and 700 °C to increase catalytic activity which was characterized by X-ray diffraction pattern. The peaks of CaO were obtained by calcinations carried out at 700 °C for varied time periods. Comparison of images of scanning electron microscope of calcined eggshells with natural eggshells showed the formation of porous structure with an average pore diameter of 39.17 nm. Biodiesel was prepared by transesterification of algal oil by uncalcined eggshells, calcined eggshells and commercial calcium oxide with methanol. The yield of biodiesel was higher for calcined eggshells (78 %) than uncalcined eggshells (53 %). The produced biodiesel was sampled and analyzed for Gas chromatography – mass spectrometry, which confirmed the presence of predominant alkyl esters like hexadecenoic acid methyl ester, docosanoic methyl ester, palmitic acid methyl ester and oleic acid methyl ester. The heterogeneous catalyst can be reused upto seven times without any prescribed loss of catalyst activity. The Introduction of this eco-friendly catalyst in the transesterification reaction of biodiesel from Ulva lactuca will be cost-reduction for the production of an alternative green fuel.

Metal Oxide Doped Egg Shell-Fly Ash Composite: An Effective Catalyst for Transesterification of Waste Oil

Biodiesel is a promising alternative for fossil fuels as it is a renewable source of energy and is considered a green fuel. Generally used method for preparation of biodiesel is catalytic transesterification. Fly ash, an inorganic waste, is a major environmental contaminant. The utilization and safe management of this material is the need of the hour. In this short communication, we report a composite of fly ash and eggshell modified with zinc oxide (ZEF) as a low-cost, efficient, and reusable heterogeneous base catalyst for transesterification reaction of waste cooking oil. The catalyst was prepared by the wet impregnation method and was characterized by FT-IR, XRD, and SEM techniques. Catalytic performance was checked in biodiesel preparation. Conditions like catalyst loading, oil: methanol ratio, temperature, and time were optimized. Product formation was confirmed by the GC analysis.

Recent developments in hydrogels containing copper and palladium for the catalytic reduction/degradation of organic pollutants.

The elimination of toxic and hazardous contaminants from different environmental media has become a global challenge, causing researchers to focus on the treatment of pollutants. Accordingly, the elimination of inorganic and organic pollutants using sustainable, effective, and low-cost heterogeneous catalysts is considered as one of the most essential routes for this aim. Thus, many efforts have been devoted to the synthesis of novel compounds and improving their catalytic performance. Recently, palladium- and copper-based hydrogels have been used as catalysts for reduction, degradation, and decomposition reactions because they have significant features such as high mechanical strength, thermal stability, and high surface area. Herein, we summarize the progress achieved in this field, including the various methods for the synthesis of copper- and palladium-based hydrogel catalysts and their applications for environmental remediation. Moreover, palladium- and copper-based hydrogel catalysts, which have certain advantages, including high catalytic ability, reusability, easy work-up, and simple synthesis, are proposed as a new group of effective catalysts.

Optimization of the Process for Obtaining Biodiesel from Seeds of Ricinus communis using Basic Heterogeneous Catalyst in Transesterification

Abstract. Castor bean (Ricinus communis) can be a high-demand crop for the production of biodiesel, an alternative biofuel similar to conventional diesel. The objective of the work has been to optimize the method of obtaining biodiesel from a “green technology” process, directly splitting the seeds of three macerated castor varieties, without prior extraction of the oil with n-hexane as is traditional. Also using low-cost heterogeneous basic catalysts, friendly to the environment. It has been shown that it is feasible to obtain biodiesel as an eco-fuel from castor beans directly, without prior oil extraction with the consequent saving of n-hexane solvent and the non-use of sodium hydroxide. It is feasible to substitute methanol for ethanol (less toxic and cheaper), and as a novel aspect, the use of BaCO3 as a heterogeneous catalyst, not reported in any reference of those consulted. Yield percentages ranging between 31% and 45% were obtained, comparable to those obtained from previous oil extractions. It was concluded that of the three varieties of castor bean evaluated, the variety HG-A-1 (collected in Atotonilco el Grande, Municipality of the State of Hidalgo) classified as IBEA type, is the one that presents the best results. Keywords: Barium carbonate, Castor oil, Eco-fuel, Ethanol, Seed.

Application of converter slag as an effective and low-cost solid base catalyst for the transesterification process

ABSTRACT Calcium oxide is a suitable and valuable catalyst for producing biodiesel. In this research, the feasibility of producing biodiesel from waste frying oil with a new environmentally friendly and low cost heterogeneous solid-base catalyst from waste slag was evaluated. The composition, texture, structure, and chemical characteristics of the converter slag were examined by thermogravimetric analysis (TGA), X-ray fluorescence (XRF), Brunauer–Emmett–Teller (BET), Field Emission Scanning Electron Microscopy (FE-SEM), and X-ray diffraction (XRD). Moreover, the catalyst reusability, reaction conditions, and the effects of catalyst preparation conditions were studied in this experiment. The converter slag was calcined at 1100°C for 8 hours. Gas chromatography (GC) was used to analyse and evaluate the produced biodiesel. The biodiesel characteristics were compared with the ASTM D 6751 standard. It was found that the maximum efficiency of using converter slag for producing biodiesel was 77.8 ± 1.5% under the reaction time 6 hours, catalyst amount 10 wt.%, and reaction conditions of methanol to oil molar ratio 15:1. The converter slag as a catalyst was recovered and reused for three cycles. This study demonstrated how a low-cost catalyst could be used in the production of a value-added product (i.e. biodiesel) from waste oil.

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

Plastics are ubiquitous in our society and are used in many industries, such as packaging, electronics, the automotive industry, and medical and health sectors, and plastic waste is among the types of waste of higher environmental concern. The increase in the amount of plastic waste produced daily has increased environmental problems, such as pollution by micro-plastics, contamination of the food chain, biodiversity degradation and economic losses. The selective and efficient conversion of plastic waste for applications in environmental remediation, such as by obtaining composites, is a strategy of the scientific community for the recovery of plastic waste. The development of polymeric supports for efficient, sustainable, and low-cost heterogeneous catalysts for the treatment of organic/inorganic contaminants is highly desirable yet still a great challenge; this will be the main focus of this work. Common commercial polymers, like polystyrene, polypropylene, polyethylene therephthalate, polyethylene and polyvinyl chloride, are addressed herein, as are their main physicochemical properties, such as molecular mass, degree of crystallinity and others. Additionally, we discuss the environmental and health risks of plastic debris and the main recycling technologies as well as their issues and environmental impact. The use of nanomaterials raises concerns about toxicity and reinforces the need to apply supports; this means that the recycling of plastics in this way may tackle two issues. Finally, we dissert about the advances in turning plastic waste into support for nanocatalysts for environmental remediation, mainly metal and metal oxide nanoparticles.

Characterization of Eggshell: A Heterogeneous Catalyst in Transesterification of Sand Apple (Parinari polyandra) Seed Oil

&#x0D; &#x0D; &#x0D; The objective of this study was to characterize a low cost heterogeneous catalyst from the transesterification of sand apple (Parinari polyandra B.) biodiesel. Sand apple fruits were processed and oil was extracted using solvent extraction method. Raw eggshells were calcined at 800°C for 120 min in the muffle furnace. Surface properties of the raw and calcined eggshell were characterized using Fourier Transformed Infrared Radiation (FTIR) and X-Ray Fluorescence (XRF). Transesterification of the Sand Apple Oil (SASO) with ethanol in the presence of the calcined catalyst to produce ethyl ester and glycerol were optimized using Central Composite Design at different temperatures and time. Reactants for the transesterification process were the raw SASO and anhydrous ethanol. The study shows that raw eggshell was more stable with hydrogen bond form at 2,724 cm-1an while oil yield of 53.13 % was obtained from sand apple kernels. Ethyl ester yield of 90% was obtained from SASO. The results of transesterification shows the maximum biodiesel yield of 90% was obtained at reaction temperature of 65°C and time of 120 min, while the minimum yield of 70% was obtained at temperature of 55°C and time of 60 min; indicating that biodiesel increase with increase in time. Similarly, yield of ethyl ester of SASO also increased when the reaction temperature increased. The percentages of biodiesel yield obtained from SASO transesterification in this study showed that sand apple is promising oil for biodiesel production as compared with other vegetable oil crop obtained in previous studies&#x0D; &#x0D; &#x0D;