Case Studies in Chemical and Environmental Engineering最新文献

{"title":"Synergistic thermal and surface area properties of Al2O3–TiO2/water hybrid nanofluids","authors":"Yokanan Gustino Djentoe ,&nbsp;Farrel Yoga Widiasto ,&nbsp;Hilbran Tama Dida Effendi ,&nbsp;Musabbikhah ,&nbsp;Sri Hartati ,&nbsp;Budi Santoso ,&nbsp;Budi Kristiawan ,&nbsp;Agung Tri Wijayanta","doi":"10.1016/j.cscee.2025.101102","DOIUrl":"10.1016/j.cscee.2025.101102","url":null,"abstract":"<div><div>This work investigated experimentally on synergistic thermal and surface area properties of water-based Al₂O₃–TiO₂ hybrid nanoparticles at a given volume ratio (50:50). Morphology and structure characterization were performed using Transmission Electron Microscope (TEM) and Surface Area Analysis (SAA), while thermal properties were analyzed using a thermal properties analyzer. The aims of this study were to investigate morphology and structure characterization and to evaluate thermal behavior using Transient Line Heat Source (TLHS), including thermal conductivity, heat capacity, and diffusivity. TEM micrographs revealed that TiO₂ and Al₂O₃ nanoparticles were characterized by fractal-like arrangements and quasi-spherical morphology, respectively. The structural analysis of TiO₂ and Al₂O₃ nanoparticles reveals a mesoporous structure with curve isotherm type IV that has loop hysteresis characteristics. The thermal durability of the water-based Al₂O₃–TiO₂ hybrid nanoparticles is shown to have a strong relationship with the Moldoveanu model, confirming the trend of increasing thermal durability with a decrease in temperature as a result of increased nanoparticle mobility. According to this study, thermal behavior indicates that there are differences in temperature between 20 and 65 °C. Heat capacity increases significantly from 4 to 8 MJ/m²·K, with the fastest change occurring between 20 and 30 °C, whereas thermal diffusivity is bounded between 0 and 0.2 mm²/s. All of this highlights the potential applications in analysis and energy storage, highlighting the transfer characteristics of nanomaterials that are useful. The potential of hybrid nanofluids in long-term thermal management systems is demonstrated in this case study.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101102"},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amino acid-derived imidazole zwitterion as green interfacial corrosion inhibitor for cold rolled steel","authors":"Wan Mohd Norsani Wan Nik ,&nbsp;Jiyaul Haque ,&nbsp;Mohd Sabri Mohd Ghazali ,&nbsp;Atria Pradityana ,&nbsp;Izionworu Vincent Onuegbu ,&nbsp;Walid Daoudi ,&nbsp;Elyor Berdimurodov ,&nbsp;Ahmed Abdulamier Al-Amiery","doi":"10.1016/j.cscee.2025.101103","DOIUrl":"10.1016/j.cscee.2025.101103","url":null,"abstract":"<div><div>A natural amino acid methionine-derived imidazole zwitterion was synthesized and investigated as a corrosion inhibitor on cold-rolled steel in an acid environment using weight loss, electrochemistry, and SEM techniques. The synthesized imidazole zwitterion inhibitor was fulfilled with green parameters: multicomponent single-step reaction, reaction at ambient temperature, and water used as a solvent. The corrosion study results show that imidazole zwitterion exhibits effective inhibition efficiency (84 %) at very low concentrations (100 ppm). The imidazole zwitterion exhibited excellent inhibition efficiency (72 %) at high temperature (95 °C). SEM results supported the experimental findings. The adsorption of imidazole zwitterion obeys the Langmuir adsorption isotherm with a uniform inhibitor film achieved via physical and chemical adsorption mechanisms. Imidazole zwitterion can be useful in low inhibitor concentration applications such as pipeline flushing and cleaning.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101103"},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of coal fly ash for high capacity adsorption of methylene blue","authors":"Mardiyah Kurniasih ,&nbsp;Nurul Hidayat Aprilita ,&nbsp;Roto Roto ,&nbsp;Mudasir Mudasir","doi":"10.1016/j.cscee.2025.101101","DOIUrl":"10.1016/j.cscee.2025.101101","url":null,"abstract":"<div><div>Coal fly ash (FA) waste from local thermal power plant has been modified by acid activation and SiO₂ enrichment using hydrochloric and acetic acids. The modified FA with acid activation (FAA_HAc and FAA_HCl) and SiO₂ enrichment (SiO₂_HCl and SiO₂_HAc) were applied in the adsorption of methylene blue (MB) from aqueous solution. The physicochemical and morphological characteristics of the modified FA were characterized by XRF, SEM-EDX, XRD, BET, and TGA. The adsorption study was carried out in a batch system by optimizing pH, adsorbent dosage, contact time, initial dye concentration and temperature. The optimum adsorption is achieved at pH 8.0, adsorbent dosage of 1.5 g/L and contact time of 75 min. The experimental data fits the pseudo-second-order models and the activation energies (E_a) are 48.71, 48.95, 32.26, and 30.61 kJ mol⁻¹ for FAA_HAc, FAA_HCl, SiO₂_HAc, and SiO₂_HCl, respectively. Langmuir, Freundlich, or Temkin isotherm models described well the experimental data. The maximum adsorption capacities (q_m) of FAA_HAc, FAA_HCl, SiO₂_HAc, and SiO₂_HCl with Lamgmuir model at 318 K are 151.33, 146.18, 100.78, and 95.81 mg/g, respectively. The <em>q</em>_m values increase with temperature, indicating endothermic adsorption process. Themodynamic study gives the positive value of enthalpy (ΔH°) and entropy (ΔS°), and the negative value of free energy (ΔG°) changes, suggesting an endothermic and spontaneous process. The lower activation energy and higher adsorption capacity of modified FA with a simple, low-cost and eco-friendly technique provide a prospective application of the adsorbents for the removal of dye waste from aqueous solution.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101101"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetically separable silica-chitosan hybrids for efficient phosphate adsorption in aqueous solution","authors":"Nuryono Nuryono ,&nbsp;Sukamto Sukamto ,&nbsp;Eko Sri Kunarti ,&nbsp;Philip Anggo Krisbiantoro ,&nbsp;Wan Nazwanie Wan Abdullah ,&nbsp;Yuichi Kamiya","doi":"10.1016/j.cscee.2025.101100","DOIUrl":"10.1016/j.cscee.2025.101100","url":null,"abstract":"<div><div>In the present study, magnetic silica-chitosan hybrid (NMP@SiO₂/CPTMS/Chi) was synthesized via a convenient and green sol-gel technique under room temperature, and the material was used as a highly efficient magnetic adsorbent for the removal of phosphate ions in water. While the magnetic properties of NMP from iron enable the material to be quickly separated via magnetic separation, the abundant active sites from the chitosan made the hybrid exhibit high adsorption capacity for phosphate ions. At pH 6, the removal of phosphate ions followed the pseudo-second-order (PSO) kinetic model with the adsorption rate constant (<em>k</em>_<em>2</em>) of 5.9 × 10^-3 mg g⁻¹ min⁻¹ and obeyed the Langmuir isotherm model with a maximum adsorption capacity (<em>q</em>_<em>max</em>) of 15.06 mg g⁻¹, outperforming most of the previously reported adsorbents. Stability tests and derivative thermogravimetry (DTG) analysis demonstrated that NMP@SiO₂/CPTMS/Chi remained stable even under strongly acidic conditions and possessed high thermal stability, respectively. The synergistic combination of high adsorption capacity, acid stability, thermal stability, and facile magnetic separation renders NMP@SiO₂/CPTMS/Chi a promising adsorbent for wastewater treatment and environmental remediation. Overall, this innovative material represents a significant advancement in phosphate removal, offering a sustainable and effective solution to address the global challenge of water pollution and protect aquatic ecosystems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101100"},"PeriodicalIF":0.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the matching relationship of municipal solid waste management and alternative fuel in Indonesia's cement industry","authors":"Wiharja ,&nbsp;Suherman ,&nbsp;Syafrudin ,&nbsp;Muhammad Abdul Kholiq ,&nbsp;Reba Anindyajati Pratama ,&nbsp;Muhammad Haqqiyuddin Robbani ,&nbsp;Feddy Suryanto","doi":"10.1016/j.cscee.2025.101098","DOIUrl":"10.1016/j.cscee.2025.101098","url":null,"abstract":"<div><div>The cement industry in Indonesia, heavily relies on coal, contributing significantly to greenhouse gas (GHG) emissions. Simultaneously, Java Island generates over 23 million tons of municipal solid waste (MSW) annually, with limited utilization for energy recovery. This study evaluates the feasibility of substituting coal with refuse-derived fuel (RDF) from MSW in Java's cement industry, focusing on environmental, economic, and technical aspects. Scenario analyses indicate that substituting 10%, 20%, and 30% of thermal energy with RDF could divert up to 8.7 million tons of MSW from landfills annually, reducing GHG emissions by up to 2.77 million Gg CO₂-eq. These reductions align with Indonesia's environmental policies and global climate commitments under the Paris Agreement. The economic assessment demonstrates the viability of RDF, with potential annual cost savings of up to $421 million. Beyond addressing coal dependency, RDF adoption supports circular economy practices, reduces landfill reliance, and mitigates environmental pollution. However, challenges such as infrastructure gaps and regulatory barriers require attention. This study provides actionable insights to guide policy formulation, foster industry investment, and facilitate the implementation of RDF-based energy solutions. By bridging waste management and sustainable energy practices, the findings contribute to Indonesia's renewable energy goals, emphasizing the practical applications of RDF for a more sustainable future in industrial operations.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101098"},"PeriodicalIF":0.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic improvement mechanism of SnO2/Sn-doped g-C3N4 Z-type heterojunctions for visible-irradiation-based destruction of organic pollutants: Experimental and RSM approaches","authors":"Yossor R. Abdulmajeed ,&nbsp;Saad H. Ammar ,&nbsp;Zaid H. Jabbar ,&nbsp;Hind J. Hadi ,&nbsp;Mohammed D. Salman ,&nbsp;Alaa Jasim Awadh","doi":"10.1016/j.cscee.2025.101096","DOIUrl":"10.1016/j.cscee.2025.101096","url":null,"abstract":"<div><div>This work investigated the possibility of applying SnO₂/Sn-doped g-C₃N₄ hybrid as an efficient photocatalyst for visible light-based degradation of ibuprofen (IBP). Response surface methodology (RSM) has been adopted to optimize the IBP photodegradation. The conditions were initially fixed at photocatalyst dose = 0.2 g/L, Solution pH = 7, and IBP concentration = 10 mg/L in order to assess the SnO₂/Sn-doped g-C₃N₄ activity, which exhibited 91 % IBP destruction after 90 min. Then, the process variables (IBP concentration, pH, and photocatalyst dose) were adjusted based on the Box-Behnken Design (BBD). The experimental IBP photodegradation was exceedingly correlated with that value predicted by the obtained quadratic model (R² = 0.993, F-value = 79.19, and P-value &lt;0.0001). The IBP photodegradation tests exhibited that the SnO₂/Sn-doped g-C₃N₄ dose of 0.6 g/L, solution pH of 11, and IBP concentration of 10 mg/L were the optimal values. The photocatalyst dose was specified as the major factor in the process. The boosted photoactivity was due to the created Z-type heterojunction among SnO₂ and Sn-doped g-C₃N₄, which provides an excellent separation of photogenerated charge-carriers. Accordingly, we explored the reaction mechanism in light of trapping studies. Besides, the stability of SnO₂/Sn-doped g-C₃N₄ hybrid photocatalyst was tested.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101096"},"PeriodicalIF":0.0,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heat stress in landfill environments: Evaluating worker exposure and occupational risks","authors":"Azham Umar Abidin ,&nbsp;Anisful Lailil Munawaroh ,&nbsp;Aulia Rosinta ,&nbsp;Arvi Tri Sulistiyani","doi":"10.1016/j.cscee.2025.101097","DOIUrl":"10.1016/j.cscee.2025.101097","url":null,"abstract":"<div><div>Heat stress is a notable occupational health hazard, particularly because global climate change intensified environmental heat exposure. Workers in high-temperature environments, such as landfill sites, encounter significant health risks associated with heat stress, including dehydration, excessive sweating, fatigue, headaches, and potentially more severe conditions. This study examined landfill workers in Yogyakarta, where outdoor conditions increased their susceptibility to heat-related hazards. This study aimed to quantify heat stress in landfill operations via objective data analysis, which refers to the quantitative assessment of environmental heat conditions using the wet bulb globe temperature (WBGT) index, with the goal of informing practical interventions and improving worker health and safety protocols. This cross-sectional study, a type of observational research design, examined data collected at specific points in time. This study involved 39 landfill workers, with WBGT measurements collected at 25 sampling locations in the morning, daylight, and afternoon. This study evaluated the risk of heat stress at various times of the day using WBGT values. The results demonstrated notable fluctuations in WBGT, with peak levels occurring in daylight, consequently increasing the risk of heat stress. Age and body weight are significant factors because older individuals and those with increased body mass exhibit heightened susceptibility to heat retention. Statistical analysis revealed significant differences in WBGT measurements between morning and daylight and between daylight and afternoon (p &lt; 0.001). These findings highlight the necessity for timely monitoring and management strategies to reduce heat stress risk, especially during daylight hours.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101097"},"PeriodicalIF":0.0,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the preparation and denitrification performance of CeOx/ACN-Al2O3 new SCR catalyst","authors":"Guo Xuewei ,&nbsp;Qu Changsheng ,&nbsp;Liu Yatao ,&nbsp;Xu Dongyao","doi":"10.1016/j.cscee.2025.101099","DOIUrl":"10.1016/j.cscee.2025.101099","url":null,"abstract":"<div><div>Selective catalytic reduction technology is the most widely used method in flue gas denitrification. This article uses the kneading-ultrasonic equal volume impregnation method to prepare a modified activated carbon-alumina supported cerium oxide catalyst (CeO_x/ACN-Al₂O₃) for flue gas denitrification in coal-fired power plants. The relationship between the catalyst with different carrier and active component under different conditions and the conversion rate of nitrogen oxides is studied. XRD and other characterization methods are used to explore the intrinsic mechanism of the catalyst, and the main preparation parameters of the catalyst are optimized, including CeO_x loading amount, starch content, different concentrations of HNO₃, calcination temperature, calcination time, etc. The research results show that the catalyst with a calcination temperature of 400 °C, a starch content of 30 %, a CeO_x loading rate of 13 %, and a 40 % HNO₃ modified CeO_x/ACN-Al₂O₃ has the highest denitrification efficiency, reaching 96.18 % at the optimal operating temperature of 300 °C.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101099"},"PeriodicalIF":0.0,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The thermal-flow performance of water-Al2O3 nanofluid flow in an elliptical duct heat exchanger equipped with two rotating twisted tapes","authors":"Hassan Wathiq Ayoob ,&nbsp;Ihab Omar ,&nbsp;Wed khalid Ghanim ,&nbsp;Mohammad N. Fares ,&nbsp;Mohammad Ali Fazilati ,&nbsp;Soheil Salahshour ,&nbsp;Sh Esmaeili","doi":"10.1016/j.cscee.2025.101094","DOIUrl":"10.1016/j.cscee.2025.101094","url":null,"abstract":"<div><h3>Background</h3><div>The thermal-flow performance of nanofluid (<em>NF</em>) flow in an elliptical duct heat exchanger fitted and turbulated with two rotating tapes is investigated. The issues concerning rotating twisted tapes inside the oval tubes using <em>NF</em> as the working fluid simulated with two-phase modeling have received less attention in previous studies.</div></div><div><h3>Methods</h3><div>Considering the importance of employing the heat transfer improving methods in tubular heat exchangers, the passive and ative heat transfer improving methods examined here. As a novel study case, the rotated tapes beside the water-<em>Al</em>_<em>2</em><em>O</em>_<em>3</em> <em>NF</em> of was used; and sensitivity analysis was performed to reveal the effect of the volume fraction of nanoparticles (<em>ϕ</em>), tapes rotational speed and Re number on the <em>Nu</em> number, pumping power and figure of merit (<em>FOM</em>). The heat flux of 5000 Wm⁻² was applied to the wall surface, and the two-phase mixture method was employed for the simulation. The heat exchanger performance is studied in cases of fixed and rotating twisted tapes with three different rotational speeds. The results show that increasing the Re number, <em>ϕ</em> and the rotation speed of the blades would increase the <em>Nu</em> number and pumping power in all cases. The increase in <em>ϕ</em> improves the <em>Nu</em> number by 6.1 %–19.4 % and the pumping power by 59.2–280 %. The <em>Nu</em> number change by increasing <em>ϕ</em> is lower at low Re numbers and becomes higher at high Re numbers. The effect of <em>ϕ</em> increment on heat transfer is increasing but took place with a higher inclination rate in rotating tapes rather than stationary tapes and plain tube cases. In the cases of rotated twisted tape mode, the value of <em>FOM</em> is always greater than one and is below 0.9 for stationary mode.</div></div><div><h3>Significant findings</h3><div>The highest value of <em>FOM</em> is 1.57, which is for the highest rotational speeds, the lowest Re number, and ϕ = 1 %. Increasing the Re number reduces the <em>FOM</em> while increasing <em>ϕ</em> improves it.</div></div><div><h3>Practical significance and potential area of application</h3><div>The increasing need for efficient heat transfer in heat exchanger devices necessitated the application of heat transfer augmentation techniques. The effects of twisted tapes, their rotation, and the application of <em>NF</em>s in heat exchangers as the active and passive heat transfer increment methods are studied numerically.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101094"},"PeriodicalIF":0.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave-assisted enzymatic production of cosmetic ester 2-ethylhexyl oleate and myristate","authors":"Eko K. Sitepu ,&nbsp;Emilia Abdulmalek ,&nbsp;Helmina Sembiring ,&nbsp;Rodiah N. Sari ,&nbsp;Ella Parawita ,&nbsp;Dea Hafizah ,&nbsp;Novia Ramadhani ,&nbsp;Maya R.S. Siregar ,&nbsp;Firman Sebayang ,&nbsp;Juliati Br. Tarigan","doi":"10.1016/j.cscee.2024.101089","DOIUrl":"10.1016/j.cscee.2024.101089","url":null,"abstract":"<div><div>The enzymatic microwave-assisted cosmetic esters production from esterification of fatty acids with 2-ethylhexanol using enzyme lipase as a biocatalyst was developed. The parameters of enzyme weight, molar ratio, reaction time and microwave power were investigated to determine the maximum conversion of 2-ethylhexyl myristate (EHM) and 2-ethylhexyl oleate (EHO). The maximum conversion of EHM and EHO of 92.0 ± 0.4 % and 98.2 ± 0.3 %, respectively, were achieved under reaction conditions of enzyme weight of 5 wt%, molar ratio of 1:3, reaction time of 0.5 minutes and microwave power of 20 %. All the parameters tested significantly affect the conversion. The reusability test revealed that the liquid lipase lost its catalytic activity after two subsequent cycles. However, the availability of low-cost enzyme lipase derived from genetically modified microorganisms increases its competitiveness. Microwave radiation system has better performance and offers a fast route of cosmetic esters production, which is also more energy-efficient and cost-effective.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101089"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}