Papers by Keyword: Waste Cooking Oil

Abstract: This research aimed to investigate the possibility of synthesizing a bio-based plasticizer from waste cooking oil using an epoxidation reaction to replace dioctyl phthalate (DOP) in PVC film, which is toxic and hazardous to human health and the environment. This involved synthesizing used household oil through an epoxidation reaction to introduce epoxy groups, followed by isopropyl alcohol to break the epoxy rings and form hydroxyl groups. The chemical structure of the epoxidized waste cooking oil plasticizer was analyzed using Fourier transform infrared spectroscopy (FT-IR), with a focus on confirming the presence of epoxy groups within the 3,500 – 3,000 cm^-1 range. Subsequently, this bio-based plasticizer was used in various ratios to DOP to produce PVC films, including ratios of 5:0, 4:1, 3:2, 2:3, 1:4, and 0:5. These PVC films were subject to a comprehensive examination of their physical and chemical properties, including their resistance to tensile stress, elongation ability, the impact on molecular functional groups in the PVC film, and a leaching test. The results showed that the optimal proportion of epoxidized waste cooking oil plasticizer to DOP was 5:0. This ratio demonstrated superior tensile strength, enhanced elongation capacity, increased thermal stability, and exhibited the most robust resistance against solvents compared to other ratios tested.

Abstract: This study aims to: (1) activate rice husk ash (ASP), coconut shell ash (ATK), and wood charcoal (AK) to become adsorbents and characterize them; (2) purify waste cooking oil (WCO) using ASP, ATK, and AK adsorbents; (3) making biodiesel from the purified WCO and characterizing their quality. This work uses experimental techniques, starting with preparing adsorbents by activating with KOH and characterizing activated ASP, ATK, and AK adsorbents using SEM and FTIR. The adsorbents were then used to purify WCO. Biodiesel was made from purified WCO by transesterification using an H₂SO₄ catalyst in ethanol. The process was carried out at 60°C for 12 hours. Then biodiesel layer was heated to 70°C to evaporate the ethanol. The biodiesel products were tested according to Indonesian National Standard (SNI). The results showed that peaks of the activated ASP, ATK, and AK adsorbents have alcohol groups (-OH), and other functional groups. Activated adsorbents have many pores when compared to adsorbents before activation. Biodiesel synthesized using activated ASP adsorbent has a higher flash point than using activated ATK and AK adsorbents and fulfils SNI specifications.

Abstract: Due to the greenhouse effect of increased fossil fuel use, resulting in an increase in the period during which fossil fuels will remain available. Because of its advantages for the environment and its production from renewable resources, biodiesel has grown more appealing. As there is a supply of used cooking oil, interest in producing biodiesel is rising. This research examines how CaO and sawdust function as heterogeneous catalysts in transesterification regarding ethanol to produce bio-diesel from the used cooking oil. The impacts of the subsequent variables on the yield of the created biodiesel were investigated. Those parameters include the catalyst concentration (0.5-3 wt%), reaction period (1-4 hr), the molar ratio of ethanol to oil (8:1– 20:1), and temperature (45 to 80 °C). This led to the discovery that CaO catalyst is more efficient compared to the sawdust catalyst, with the maximum percentage yield being 75% for the sawdust catalyst and 95% for the CaO catalyst under catalyst conditions (0.50%), ethanol oil molar ratio of 20:1, and 65 Celsius temperature for 3 hours. It was evident from the results that the biodiesel fuel produced by the catalyst developed in this study fell within the acceptable range of biodiesel fuel.

Abstract: This research focuses on purifying the biodiesel provided by the Davao City Biodiesel Plant using a modified fractional distillation. The researchers considered six variables to determine raw and purified biodiesel properties and characteristics: density, kinematic viscosity, flashpoint, fire point, soap content (NaOH and KOH), and water content. The experimentation results were verified using ASTM D6751 – Standards Specification for Biodiesel Fuel (B100). For the purified biodiesel, an increase in flashpoint and fire point temperatures has been observed using the modified process, thus exceeding the standard limit. Although it affects biodiesel quality, an increase in flashpoints and fire points may be better for fuel handling, transportation, and storage safety reasons. These barely influence the overall performance of biodiesel. In conclusion, the modified process improved the quality of the raw biodiesel from 50% to 83% of the variables' set standard with the optimum conditions of 3.5 inHg at 2 hours and 2.5 inHg at 1 hour.

Abstract: The substantial increases in bitumen pricing due to increasing in demand for petroleum derived products in line with decreasing world crude resources has suggested that all industries, including the asphalt pavement industry, should be exploring economically, socially, and environmentally sustainable approaches either to enhance the performance of asphalt mixture using some recycled materials or developing eco-friendly asphalt mixture. The current study presents new development of eco-friendly bio-oil-bitumen produced using some local materials. Two bitumen sources 40-50 Pen were used, Dora and Nasiriyah, obtained from Dora and Nasiriyah refineries. Waste cooking oil was collected from local households and cafeterias without financial cost. Methanol, Sulfuric acid (as a catalyst), and Zeolite were considered in the development process. Initial results highlighted that the modified bio-oil-bitumen has shown superior performance compared to that of traditional bitumen. The current successful development has an encouragement to further characterization of such production.

Abstract: Biodiesel production waste cooking oil is usually limited by its high free fatty acid and moisture content. The synergetic effect of both base and acid source from biomass was employed to proffer way out to this challenge. This study shows the coupled development of sulfonated carbonized corn cob (S-CCC) and calcined cow-bone (C-CB) catalysts for transesterification of waste cooking oil. The catalyst was prepared by physically mixing several mass percentages of S-CCC and C-CB (fluorapatite) in strategic proportions. The maximum biodiesel yield of 96.2 % was attained for catalyst mixture of 60 wt% and 40 wt%. The developed catalyst mixture was characterized by Fourier Transform Infrared Ray (FTIR), powder X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), Brunauer–Emmett-Teller (BET). The surface area (472.3 m²/g), pore size (2.4330 nm) and volume (0.1380 cc/g) were obtained for the catalyst. The XRD shows that the crystallized structure of the bifunctional catalyst was formed majorly between 2 theta 10 and 65.Also the SEM shows a well dispersive pattern of the particles of the catalyst. The developed catalyst was employed for biodiesel optimization studies by varying factors such as time, temperature, catalyst loading and methanol: oil using optimal design under the response surface methodology. Maximum yield of 98.98 % was attained at time 6 h, temperature 65 °C, catalyst loading 6 %wt/ wt of oil and methanol to oil ratio of 11.75:1. It was observed that time and temperature had notable effect on the biodiesel yield.

Abstract: Waste cooking oil (WCO) that contained triglycerides and fatty acid derivatives can be transformed to green fuel that have similar properties to the fossil fuel. Hence, this study was focusing on the production of green fuel hydrocarbons from feedstock of waste cooking oil by deoxygenation process. The deoxygenation reaction of WCO was conducted using different loading of nickel (Ni) (5, 10, 15 and 20 % w/w) supported on commercial activated charcoal. Based on the catalytic deoxygenation (DO) reaction, the highest conversion of hydrocarbon was achieved when the reaction undergo using Ni_20%AC as catalyst at 350°C for 3 hours under inert atmosphere. The present of the higher loading active metal showed high DO reaction by decarboxylation and decarbonylation pathways with high hydrocarbon yield of 83% and high selectivity of n-C₁₅ and n-C₁₇. DO reaction also favoured the optimum strength of acidity. This study revealed that Ni_20%AC catalyst is a promising catalyst for the green fuel production in WCO.

Abstract: Waste cooking oils (WCOs) are widely considered in the scientific community as potential energy vector or source for bio-lubricants. This is because of the opportunity deriving from recycling and the difficulties in disposing of waste oils. Indeed, industrial plants for WCOs treatment include bio-refineries (bio-diesel, bio-lubricants, fine chemicals...) or simple recovery systems: the former ones assume triglycerides transformation into other compounds, according to the specific commercial destination; in the latter, triglycerides are preserved and the WCO is purified from by-products, formed during cooking process, in order to sell to the market. In an era scarred by CO₂ and petroleum dependency, biodegradable products, offer many advantages. In this scenario, nanostructured additives, which are pointed out as the step forward in lubricant technology, can exploit WCOs’ derivatives for compatibilization or as reactive components allowing improvements in nanolubricant fluids. This paper proposes a Cu nanoparticle-based additive, properly surface functionalized and prepared through a “wet chemistry” approach, to be involved in tribochemical reaction with epoxidized vegetable oil. The idea was to promote the formation of tribofilm under contact, exploiting energy generated during the movement.

Abstract: Waste cooking oil (WCO) is an under-utilized, highly abundant raw material from food industry. In this study, WCO was used to prepare solid polymer electrolyte (SPE) films via solvent-free method. WCO was first pretreated and converted into polyol using epoxidation and hydroxylation reaction. Then, WCO-based polyol was combined with diisocyanate, LiCF₃SO₃ and carboxymethyl cellulose (CMC) to obtain polyurethane SPE films. CMC was added to SPE as bio-filler to observe the effect on ionic conductivity and mechanical properties of SPE. SPE films were characterized using Fourier transformed infrared spectroscopy, electrochemical impedance spectroscopy, x-ray diffraction spectrometer (XRD), differential scanning calorimetry and tensile strength. Addition of CMC resulted in increase of ionic conductivity up to 1.19 x 10^-5 S/cm for 15% CMC. The ionic conductivity supported with reduced crystalline peaks intensity in XRD to show that the amorphous nature of SPE increased as more CMC added. Tensile strength also increased with addition of CMC and peaked at 10% CMC (34.17 MPa) due to effective hydrogen bond interaction between CMC and PU or salt. However, increased CMC amount further to 15% reduced tensile strength due to agglomeration of CMC particles. As a conclusion, addition of CMC is a viable method to improve both ionic conductivity and mechanical property of SPE.

Abstract: In this study, the biodiesel production of waste cooking oil using calcium methoxide as solid base catalyst was investigated. The calcium methoxide catalyst was synthesized from calcined quick lime reacted with methanol. The XRD result showed that the catalyst was successfully synthesized with sufficient purity. The strength of catalyst was examined on the transesterification reaction of waste cooking oil and methanol. Parameters affecting on transesterification such as the catalyst concentration, methanol-to-oil-molar ratio, reaction time and reaction temperature were investigated. The results showed that the percentage of fatty acid methyl ester conversion of 99.06%. The optimum conditions were achieved within 3 h using 3wt% catalyst concentration, 12:1 methanol-to-oil molar ratio and 65°C reaction temperature. In addition, the kinetic study of transesterification reaction was carried out at the temperature from 30°C to 65°C. The pseudo-first order was good agreement with the experiment results. The reaction rate constant (k) and activated energy (Ea) were determined as 0.023 min^-1 and 55.77 kJ/mol, respectively.