Hydrogenation Of Vegetable Oils Research Articles

Effective regeneration of deactivated Raney-Ni catalyst during multiphase hydrogenation of vegetable oil

Raney nickel is extensively used as a catalyst in the hydrogenation of vegetable oils. However, it deactivates over time and is known as a spent nickel catalyst, which is potentially hazardous to the environment. By contrasting different approaches, a straightforward and original strategy for regenerating spent nickel catalyst was developed by comparing various methods. The fresh, spent nickel catalyst, and treated catalyst samples were characterized using X-ray diffraction, Fourier transform infrared, atomic absorption spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and color scheme analyses. The results showed that the catalyst deactivation was primarily due to oil deposition over the active sites, agglomeration of catalyst, and entrainment of nickel during hydrogenation. Using n-hexane as the solvent with a spent nickel catalyst-to-solvent ratio of 1:12 (g/mL), a 65 °C temperature, and a two-hour extraction time, ultrasonication-assisted solvent extraction of spent nickel catalyst proved to be the most effective and efficient process for regeneration.

Technology for obtaining a domestic catalyst for hydrogenation of vegetable oils

Vegetable oils are obtained from oil-containing sunflower seeds, burdock, flax, rapeseed, corn, soybeans, etc. The composition of vegetable oils contains esters (triglycerides) of fatty acids with varying degrees of unsaturation. One of the main processes of vegetable oil processing is the hydrogenation process. Hydrogenation of vegetable oils is a widespread technological process of obtaining raw materials for the production of confectionery fats, detergents, soaps, stearin and other products. It is the hydrogenation of vegetable oils that is of great importance, because it increases the volume of food production. Catalysts for hydrogenation of vegetable oils are not produced in Russia. The volume of the import market is about 250 tons per year. The development and production of domestic catalysts is a priority task in solving import substitution problems. The paper suggests the most environmentally friendly and economical way to obtain catalysts of various chemical compositions is the method through an ammonia-carbonate complex. The results of reserve tests of the developed samples of nickel catalyst for hydrogenation of vegetable oils, as well as the conclusion of potential consumers are presented.

Selective hydrogenation of vegetable oil over supported noble metal nanocatalyst

Selective hydrogenation of canola oil was tested using a palladium metal catalyst on the graphene layer (G/Pd) nanocatalyst. The reaction was carried out in a batch reactor under mild operating conditions. G/Pd nanocatalyst was studied for the promotion of selectivity instearic acid (C18:0). The Pd catalysts were found to be much more active without the generation isomer such as transfatty acids, due to also the coating on the surface of Pd nanoparticles, during the hydrogenation experiment. The maximum conversion was obtained after 3 h of reaction at 100 °C, with a percentage of stearic acid of > 90 %.

Selective Catalytic Hydrogenation of Vegetable Oils over Copper-Based Catalysts Supported on Amorphous Silica

This work aims to study the selective catalytic hydrogenation of vegetable oils to maximize oleic acid content and expand the range of non-edible uses. Oleic acid (C18:1) is suitable for use as a biodegradable lubricant and is a building block in producing polymers and plastics from renewable resources. The challenge is the synthesis of heterogeneous catalysts, allowing for a maximum yield of C18:1 and low formation of the corresponding saturated acid (stearic acid). New copper-based catalysts on silica were synthesized via two synthesis methods: hydrolysis precipitation and ammonia-evaporation. Experimental tests were carried out at a lab scale operating in a semi-batch mode. The best conversion reached 90% for C18:3 and 80% for C18:2 HP Cu-silica catalyst results, the best candidate for an industrial case study. Good results were obtained in the selectivities of oleic acid production and cis/trans isomers ratio. The modified return on the investment of the designed hydrogenation plant provides the revenues of the capital costs in less than one year.

Hard kinetic modeling of the industrial reaction of hydrogenation of soybean oil optimized by heuristic problem-solving techniques

Partial hydrogenation of vegetable oils is an important process for generating fats with particular characteristics. In this study, the hard kinetic modeling of the nickel-catalyzed soybean oil hydrogenation reaction was optimized by three algorithms considering five reaction mechanisms. In three mechanisms, it was considered to have a formation of half-hydrogenated intermediate compounds, and two did not consider this possibility. The Particle Swarm Optimization (PSO) algorithm allowed for achieving lower errors between the experimental and modeled values compared to the Simulated Annealing (SA) and Sequential Simplex (SP) algorithms for the five evaluated reaction mechanisms. In addition, the optimized apparent rate constants values indicated that in these reactional conditions, the industrial reaction mechanism of hydrogenation follows some preferred reaction pathways, such as a preliminary isomerization of cis to trans fatty acids to be then hydrogenated to other fatty acids less unsaturated. These optimization algorithms proved to be efficient tools for investigating the kinetics of the partial hydrogenation reaction of soybean oil and offer promising perspectives for other industrial processes.

QUANTUM CHEMICAL STUDY OF HYDROGENATION OF SUNFLOWER OIL OVER NICKEL CATALYSTS

Vegetable oil hydrogenation is vital in edible margarine production, preventing rapid deterioration caused by double bond oxidation. Hydrogenation preserves vegetable oils by countering double bond oxidation, ensuring product quality. During this process, geometric isomers, notably trans isomers, form, driven by thermodynamic stability. Nickel catalysts are crucial in the oil and ghee industry for efficient hydrogenation. Purpose. Our study investigates the hydrogenation of sunflower oil with nickel catalysts, aiming to uncover molecular dynamics and interactions shaping this process. We reveal essential insights into linoleic acid-nickel interactions, elucidating hydrogenation mechanisms and implications for glycerol production. Methodology. Quantum chemical calculations and HyperChem software were employed to study the linoleic acid-nickel interaction during hydrogenation. This study delves into the hydrogenation of sunflower oil using nickel catalysts, employing quantum chemical calculations and HyperChem software. Results. Our research elucidates robust linoleic acid-nickel interactions through optimized structures, molecular electrostatic maps, molecular orbitals, bond lengths, and energies. These findings enhance our understanding of hydrogenation mechanisms. Additionally, we found that nickel-metal interactions primarily drive glycerol production from biofuels, promising efficiency gains. Conclusion. Our study yields insights into vegetable oil hydrogenation with nickel catalysts, optimizing processes in the oil and ghee industry. Furthermore, it has implications for glycerol production from biofuels, offering potential advancements in this area.

Review of Non-Thermal Plasma Technology for Hydrogenation of Vegetable Oils and Biodiesel

Review of Non-Thermal Plasma Technology for Hydrogenation of Vegetable Oils and Biodiesel

Baking using oleogels

Baking using oleogels

Environmentally Friendly Diesel Fuel Obtained from Vegetable Raw Materials and Hydrocarbon Crude

Currently, the global issue for countries is the search for raw materials and the production of bioenergy within their country; bioenergy also includes biodiesel fuels. One of the most promising biodiesel fuels is the green diesel fuel produced by the hydrogenation of vegetable oils. Three methods have been proposed to obtain high-quality biodiesel and environmentally friendly diesel fuel: compounding green diesel with hydro-treated diesel fuel, compositions of the improved fuel «green diesel» with bio-additives, and two-component mixtures of environmentally friendly diesel fuel with bio-additives. Using these methods, it is possible to produce fuel for diesel engines with improved lubricating properties, the wear scar diameter is reduced to 232 microns, according to EN 590: 2009, this value standard is up to 460 microns. The optimal quantitative composition of three-component environmentally friendly diesel fuel with improved lubricity was established. The dependence of the change in the lubricating properties of environmentally friendly diesel fuel on the quantitative and qualitative composition are established. A mathematical equation describing the dependence of the change in the corrected wear spot on the amount of anti-wear additive in the green diesel fuel is derived. Three-component compositions of environmentally friendly diesel fuel make it possible to obtain fuel that meets the requirements of the EN 590: 2009 standard and to expand the resources for obtaining fuel, as well as to improve the environmental and operational characteristics of the fuel.

Facet-dependent Pd0-O2−-Ce3+ active site for selective hydrogenation of linoleate ester to cis oleic acid ester

Reducing the formation of trans fatty acid in vegetable oil hydrogenation process is of significance to ensure food safety. Herein, Pd0-O2−-Ce3+ active site was constructed by strong electronic interactions between Pd0 and CeO2-Polyhedrons to promote the formation of cis fatty acid. Results reveal that the abundant oxygen vacancies of CeO2 (111) facets promote the adsorption and activation of hydrogen, leading to excellent catalytic activity of Pd/CeO2-Polyhedrons. Moreover, electronic reconstructed Pd0-O2−-Ce3+ active site limits the σ-bond rotation of half-hydrogenated intermediates through enhancing π backdonation and weakening the σ-bond, contributing to the reduction of trans products. Under mild conditions (30 °C, 0.3 MPa H2, and 2 h), Pd/CeO2-Polyhedrons catalyst shows exceptional methyl oleate selectivity of 52.6% with 93.8% conversion for sunflower oil hydrogenation. The catalyst has been further extended to the selective hydrogenation to several other vegetable oils such as sunflower oil, peanut oil, soybean oil, among others, under mild conditions.

Economic analysis for the hydrogenation of sunflower oil using Pt monolith catalysts

In the present work, the economic feasibility of the hydrogenation of vegetable oil using a platinum structured catalyst in a monolithic stirrer reactor (MSR) is examined. An 80 t day−1 hydrogenation plant with a reactor with a capacity of 10 t and a final product with 70 iodine index was selected. The study considered process equipment made of carbon steel and A304 stainless steel. Through simulation, the optimal conditions for the hydrogenation performed adiabatically were determined in order to reduce the processing costs: initial reaction temperature = 453 K, hydrogen pressure = 7 atm, stirrer speed = 200 rpm, and catalyst loading = 0.04 kgPt,sup m−3. The economic indicators showed that the proposed catalytic process is profitable, with a higher net present value using carbon steel instead of stainless steel A304. The sensitivity analysis revealed that vegetable oil cost is the most influential variable on the economy of the project, followed by hydrogen consumption and taxes. The changes in labor costs and catalyst recovery were negligible. The selection of A304 stainless steel carries a considerable economic risk, whereas when using carbon steel, the risk is lower, showing promising profit.

Comprehensive analysis of properties of green diesel enhanced by fatty acid methyl esters.

This study systematically investigates the lubricating properties of bio-hydrogenated diesel (BHD), a synthetic diesel produced through biomass hydrogenation of vegetable oil. Despite having similar chemical properties to petroleum diesel, BHD has poor lubricating properties due to the removal of sulfur and oxygenated compounds during the hydrogenation process, which could damage the engine. To address this issue, fatty acid methyl esters (FAME) was added as an additive to BHD to enhance its fuel and lubricating properties. FAME is a polar molecule with good lubricating properties that adsorb on the surface to protect against wear. The study found that adding as little as 5% FAME significantly improved the lubricating properties of BHD. The wear scar diameter (WSD) decreased from 609 μm to 249 μm, and the average film was 94% with an average coefficient of friction of 0.138 by only 5% FAME addition investigated by High Frequency Reciprocating Rig with ISO 12156-1: 2018. This shows that blending FAME with BHD could reduce engine wear and improve its lubricating properties. Disc samples were analyzed using a Scanning Electron Microscope (SEM), OLS5100 3D laser microscopy, and Fourier Transform Infrared Microscopy (FTIR) to examine the worn surface both physically and chemically. An increase in the percentage of FAME addition to BHD resulted in a smoother worn surface, exhibiting reduced delamination and debris compared to pure BHD. This effect was attributed to the protective film formed by FAME. The study highlights the potential of FAME as an additive to enhance the lubricating properties of BHD and reduce engine wear.

Research of chemical transformations in the technology of hydrogenation of vegetable oils

Chemical transformations in the technology of hydrogenation of vegetable oils have been studied. The equations describing the saturation of fatty acids in hydrogenation technology have been established. The diffusion coefficients of hydrogen and triglycerides in oils and fats have been determined. It has been shown that the observed rate of hydrogenation does not depend on the amount of catalyst and the degree of unsaturation of the fat. The high quality and food safety of catalytically hydrogenated edible fats have the required content and ratio of solid and liquid fractions of fatty acids in fat triglycerides, maintain the quantitative content of biologically important components in the composition of the initial raw material. The selection of the additive and its use in the composition of catalytic systems allows establishing and regulating the hydrogenating properties of hydrogenated edible fats with high indicators of quality and food safety. Methods for optimizing technological regimes made it possible to increase the food safety of margarine products and expand its range. The scientific and experimental results have allowed expanding and supplementing the theoretical provisions on improving the quality and food safety of catalytically hydrogenated edible fats based on cottonseed oil using various types of catalytic systems.

Vegetable Oil Hydrogenation over Pt Monolithic and Powder Catalysts: Experimental and Modeling Study

AbstractA complete kinetic study was performed for the hydrogenation of vegetable oil using a powder and a monolithic Pt catalyst. The experimental studies were carried out at a wide interval of H2 pressure, temperature, and catalyst loading using Pt/γ‐Al2O3 powder catalyst in a slurry reactor and Pt/Al2O3/Al‐structured catalyst in a monolithic stirrer reactor. The mathematical model for the reactors includes the hydrogenation and isomerization reactions, the external gas‐liquid and liquid‐solid mass transfer as well as the internal mass transfer. Four kinetic models were evaluated for both catalysts. The best fit of the experimental data was obtained by adopting a Langmuir‐Hinshelwood kinetic model for the liquid reactant and a dissociative adsorption and zero‐order reaction for H2.

Production of low trans-fat margarine by partial hydrogenation of palm oil using nature-friendly and catalyst-free microwave plasma technique

A 2.45 GHz microwave (MW) plasma furnished with a negative high voltage has been successfully utilized for partial hydrogenation of palm olein to produce low trans-fat margarine at low temperature and low pressure in the absence of a catalyst. The effects of various parameters: H2 flow rate, microwave power, reaction temperature, negative high voltage and reaction duration on the iodine value (IV) and culinary characteristics of the hydrogenated oil were investigated. The results showed the optimal parameters of 4 L-min−1 H2 flow rate, 600 W MW power, 32 °C (due to self-heating of the plasma), 60 kV negative high voltage and 4 h reaction duration, reducing the iodine value from 57.7 to 32.5 with good texture and slip melting point (SMP). The trans-fatty acid was detected by GC–MS to be 4.23%, being lower than conventional catalytic hydrogenation. This catalyst-free MW plasma hydrogenation of vegetable oil under benign conditions is a green alternative for the production of low trans-fat margarine.

Hydrogenation of vegetable oil using highly dispersed Pt/γ‐Al2O3 catalyst: Effects of key operating parameters and deactivation study

AbstractIn the present work, Pt/γ‐Al2O3 catalysts with high metal dispersion were prepared and characterized using chloroplatinic acid and platinum acetylacetonate as metal precursors. The activity and selectivity of the catalysts were evaluated in the hydrogenation of sunflower oil. A comprehensive analysis of the effects of key operational parameters on catalytic performance was carried out. The experimental variables were hydrogen pressure (275.8–551.6 kPa), temperature (160–200°C), and catalyst loading (0.005–0.015 kg Ptexp/m3oil). Platinum catalysts were active, with a double bond conversion of 28% at 2 h. The metal precursor affected catalyst selectivity. The catalyst prepared with chloroplatinic acid exhibited a lower formation of trans‐isomers compared with Pt acetylacetonate. The γ‐Al2O3 supported platinum catalyst with a metal loading of 0.51 wt.% and a metal dispersion of 98% maintained its initial catalyst activity and selectivity after 10 consecutive uses (1200 min accumulate operation time), without changes in its catalytic properties. The obtained results suggested that Pt catalysts are an attractive alternative to conventional nickel catalysts for the hydrogenation of vegetable oil.

Abstract P3-12-35: Industrial and ruminant trans fatty acid intakes and cancer risk: Results from the NutriNet-Santé cohort

Abstract Background Dietary trans fatty acids (TFAs) are either natural (from ruminant sources) or generated through industrial processes by partial hydrogenation of vegetable oils. Extended evidence demonstrated their role as cardiovascular risk factors. In contrast, their involvement in cancer etiology is suspected, but epidemiological evidence remains limited. Objectives Our objective was to investigate associations between TFA intake of different types (total, rumninant [rTFAs], industrial [iTFAs], and corresponding specific isomers) and the risk of cancer (overall and main cancer sites) in the NutriNet-Santé prospective cohort (2009-2020). Methods Overall, 104,909 participants were included. Usual TFA intake was estimated from validated repeated 24-h dietary records matched with detailed composition table. Associations between sex-specific quartiles of TFA intake and cancer risk were assessed using multi-adjusted Cox proportional hazard models. Results A total of 3,374 incident cancer cases occured during follow-up (among which 982 breast and 405 prostate cancers). Dietary intake of total TFAs was associated with higher prostate cancer risk (HRfor quartile 4 versus 1: 1.27, 1.11-1.77 Ptrend=0.005). rTFAs were associated with increased overall cancer risk (1.16, 1.02-1.32 Ptrend=0.07), in particular the conjugated linoleic acid isomers (CLA) (1.19, 1.04-1.36 Ptrend=0.04). These associations were specifically observed for breast cancer (rTFAs: 1.35, 1.06-1.72 Ptrend=0.01; CLA: 1.29, 1.00-1.66 Ptrend=0.048), in particular before menopause (rTFAs: 1.68, 1.06-2.67 Ptrend=0.02; CLA: 2.013, 1.25-3.23 Ptrend=0.003). Several iTFAs were associated with overall (1.18, 1.06-1.31 Ptrend=0.02 for transdocosenoic acid), breast (isomer 18:2t: 1.30, 1.06-1.58 Ptrend=0.01; hexadecenoic acid: 1.28, 1.05-1.56 Ptrend=0.02) and prostate (transdocosenoic acid: 1.52, 1.09-2.12 Ptrend=0.07) cancer risks. Conclusion In this large prospective study, several types of TFAs were associated with increased overall, breast and prostate cancer risks. Although further studies are needed to better understand underlying mechanisms, these results support the WHO's goal of achieving industrially produced TFAs elimination from food supplies. Meanwhile, the consumption of food products containing partially-hydrogenated oils should be avoided. Citation Format: Gaëlle Wendeu-Foyet, Véronique Chajes, Inge Huybrechts, Jean-Marie Bard, Charlotte Debras, Eloi Chazelas, Bernard Srour, Laurent Zelek, Chantal Julia, Emmanuelle Kesse-Guyot, Cédric Agaësse, Nathalie Druesne-Pecollo, Pilar Galan, Serge Hercberg, Mélanie Deschasaux-Tanguy, Mathilde Touvier. Industrial and ruminant trans fatty acid intakes and cancer risk: Results from the NutriNet-Santé cohort [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P3-12-35.

THE BOUILLON TABLES FROM TURKEY: DETERMINATON OF CIS-TRANS FATTY ACID PROFILES BY CAPILLARY GAS CHROMATOGRAPHY

Nowadays, commmercial bouillon tablets are mostly used as a flavor enhancer substant or an instant product in Turkish cuisine. As chemical structure, Trans FAs are unsaturated fatty acids having at least one double bond in its trans geometric configuration. Trans FA are occured by the partial hydrogenation of vegetable oils in the manufacturing of margarine and vegetable shortening. In this study, industrially produced commmercial bouillon tablet (n=14) samples from Turkey were analyzed by capillary (DB 23 column) gas chromatography method and an under controlled temperature oven programm with particular emphasis on cis–trans fatty acid profiles. The bouillon samples were collected as two goups (first group containing animal additives [AAB n=12] and second group including vegatable additives [VAB n=2]). There is no detailed information on fatty acid (FA) compounds, including trans fatty acids (TFAs), of consumed several commercial boullions in Turkey. There is no “trans fatty acid-free” declaration on various bouillon labels in Turkey. Large variations were observed among the cis–trans FA profiles of the boullion samples from Turkey,despite the fact that the samples are produced in the same production conditions.The palmitic (PAM) levels (predominant cis saturated FAs for all samples) of AAB samples (32.63–44.44%) were more high rather than the VAB samples (47.62–50.64%). Other major saturated FAs for AAB and VAB samples were determined stearic ( (5.28–9.90% AAB and 6.33–6.73% VAB), lauric (0.19– 5.84% AAB and 1.13–1.30% VAB) and myristic acids (0.86–2.61% AAB and 1.39–1.45% VAB).The changes of oleic (OLA) acid (from other predominant cis monounsaturated FA) of VAB samples (30.75–33.45%) were high than those of AABs (12.64–29.35%). The ranges of LO, an essential /nutritional fatty acid and the predominant FA of PUFAs, and PUFAs of AAB – except two samples– commercial bouillon samples (0.45–9.82% and 0.45–9.97% ) were low rather than VAA samples (7.97–8.14% and 8.14–8.35 %). Conjugated Linoleic (CLA) FAs, having nutritional FAs having anti-carcinogenic, antioxidative and anti-atherosclerotic effects, were determined in small amounts for only six samples (0.03% to 0.06% ). Elaidic acid (C18:1 trans acid) content, the mainly trans FA in all boullion, was within the range of 20.00–27.32% in the AAB samples, and it was significantly higher than the range in VAB samples (0.08–0.14%). Total trans fatty acids (TFAs) were another important major (second) FAs for all bouillon samples. The changes of Trans/Cis ratio ranged between 0.26 and 0.50 for AAB samples but VB samples has a little values from 0.002 to 0.003. Turkish vegetable boullion. samples have low total trans FA contents (0.19–0.26%) than the animal boullion samples (20.19–28.78%).There are a large variation and significant (P<0.05) differences were statistically determined among major cis FAs (PAM, SA, OLA, LO and LN) and their involved parameters (SFAs, MUFAs and PUFAs). The consumed several commercial boullions in Turkey were classified and characterized chemometric method (Principal Component Analysis, PCA) based on some fatty acid profiles and their parameters. Applying PCA to the all bouillon samples data determined the percentage of total variance explained by the first two PCs were 49.3% and 21.8% (totally 71.1%), respectively.

Dietary trans fatty acid intakes and cancer risk: results from the NutriNet-Santé cohort

Abstract Dietary trans fatty acids (TFAs) are either natural (ruminant sources) or industrially generated by partial hydrogenation of vegetable oils. Increasing evidence demonstrated their role as cardiovascular risk factors. Their involvement in cancer etiology is suspected, but epidemiological evidence is limited so far. We aimed to investigate the associations between different types of TFAs (total, ruminant [rTFAs], industrial [iTFAs] and corresponding specific isomers) and the risk of cancer in the NutriNet-Santé prospective cohort (2009-2020). Overall, 104,909 participants were included. Usual TFA intake was estimated from validated repeated 24-h dietary records. Associations between sex-specific quartiles of dietary intake of TFA and cancer risk were assessed using multi-adjusted Cox proportional hazard models. A total of 3,374 incident cancer cases occured during follow-up (including 982 breast and 405 prostate cancers). Total TFAs was associated with higher prostate cancer risk (1.34[1.25;1.87] Ptrend=0.005). rTFAs were associated with increased overall cancer risk (HRfor quartile 4 versus 1: 1.21[1.06;1.39] Ptrend=0.03), in particular the conjugated linoleic acid isomer (CLA) (1.19[1.04;1.36] Ptrend=0.04). These associations were specifically observed for breast cancer, in particular before menopause (rTFAs: 1.78[1.11;2.87] Ptrend=0.006; CLA: 2.013[1.25;3.23] Ptrend=0.003). Several iTFAs were associated with overall (1.18[1.06;1.31] Ptrend=0.02 for transdocosenoic acid), breast (isomer 18:2t: 1.30[1.06;1.58] Ptrend=0.01; hexadecenoic acid: 1.28[1.05-1.56] Ptrend=0.02) and prostate (transdocosenoic acid: 1.52[1.09;2.12] Ptrend=0.07) cancer risks. In this large prospective study, several types of TFAs were associated with increased overall, breast and prostate cancer risks. Although further studies are needed to better understand underlying mechanisms, these results support the WHO's goal of achieving industrially produced TFAs elimination from food supplies. Key messages Higher intake of dietary trans fatty acids is associated with an increased risk of various cancers. Our findings support WHO’s global recommendation of eliminating industrially produced TFAs by 2023.

Highly stable platinum monolith catalyst for the hydrogenation of vegetable oil

In the present work, a novel structured platinum catalyst where the Pt is supported on an anodized aluminum monolith was studied for the hydrogenation of sunflower oil. The catalytic tests were carried out in a monolithic stirred semi-batch reactor at temperatures between 433 and 473 K, and hydrogen pressures from 2.7 to 5.4 atm. The monoliths were prepared using H2PtCl6 and Pt(C5H7O2)2 metal precursors and characterized by temperature programmed reduction, N2 adsorption isotherms, H2 chemisorption, scanning electronic microscopy, inductively coupled plasma-atomic emission spectroscopy, and ultrasound adherence tests. Response surface methodology was used to study the relationship between the process variables and C = C conversion, concentration of trans-isomers and selectivity toward monosaturated (S1) and saturated (S2) fatty acids.The catalysts showed to be active, reaching a conversion of 18% at 120 min. The H2PtCl6 impregnated monolith exhibited low selectivity towards trans-isomer formation, maintaining its initial catalyst activity after 40 consecutive uses, without modifications on S1 and S2. The results indicated that platinum monolith catalysts could be an affordable alternative to commercial Ni catalysts, removing the filtration and bleaching stages, hence reducing the processing costs.