The Experts below are selected from a list of 14865 Experts worldwide ranked by ideXlab platform
Oznur Kose - One of the best experts on this subject based on the ideXlab platform.
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immobilized candida antarctica lipase catalyzed alcoholysis of Cotton Seed oil in a solvent free medium
Bioresource Technology, 2002Co-Authors: Oznur Kose, Melek Tüter, Ayse H AksoyAbstract:Abstract The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica , commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 °C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
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Immobilized Candida antarctica lipase-catalyzed alcoholysis of Cotton Seed oil in a solvent-free medium.
Bioresource technology, 2002Co-Authors: Oznur Kose, Melek Tüter, H. Ayşe AksoyAbstract:The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica, commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 degrees C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
Surendra Singh Kachhwaha - One of the best experts on this subject based on the ideXlab platform.
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investigation of ultrasound assisted koh and cao catalyzed transesterification for biodiesel production from waste Cotton Seed cooking oil process optimization and conversion rate evaluation
Journal of Cleaner Production, 2020Co-Authors: Anvita Sharma, Pravin Kodgire, Surendra Singh KachhwahaAbstract:Abstract Development of Ultrasound (US)-assisted biodiesel production from Waste Cotton-Seed Cooking Oil (WCCO) is gaining importance due to significantly lower reaction time and high energy-efficiency. In the present novel work, a comprehensive experimental study for KOH and CaO catalyzed transesterification process with detailed process optimization was performed. Kinetic modeling, scalability and energy analysis were performed to confirm the relative importance of US compared to Mechanical Stirring (MS). The optimized process parameters for KOH and CaO catalyst conditions were determined as methanol/oil molar proportion: 6.1:1 and 10.9:1, catalyst amount (w/w) %: 0.46 % and 0.96 %, reaction temperature: 53.2 °C and 48.3 °C, and the corresponding yield: 97.76 % ± 0.03 and 96.16 % ± 0.03 respectively. Box-Behnken model exhibits a significant correlation with experimental results in case of KOH (R2 = 0.98) and CaO (R2 = 0.97) catalyzed conditions. Triglyceride conversion follows pseudo-first-order reaction kinetics. The activation energy calculated for KOH and CaO catalyzed conditions was 21.36 and 33.83 kJ/mol respectively, which is 1.5 – 1.7 times lower as compared to MS process. Energy analysis showed that dissipated energy in US process is higher compared to MS. The scalability effect (with tenfold batch size), and ultrasonic duty cycle analysis showed that the continuous sonication is more effective in comparison to pulse mode. Physicochemical properties of produced biodiesel were observed in accordance with fuel specification as prescribed by ASTM D6751 . Outcomes of this study are useful for development of energy-efficient US-assisted biodiesel production process on industrial scale.
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biodiesel production from waste Cotton Seed cooking oil using microwave assisted transesterification optimization and kinetic modeling
Renewable & Sustainable Energy Reviews, 2019Co-Authors: Anvita Sharma, Pravin Kodgire, Surendra Singh KachhwahaAbstract:Abstract The current research focuses on process optimization and kinetic study of microwave-assisted transesterification process using KOH and CaO catalyst from waste Cotton-Seed cooking oil (WCCO). In order to enhance the biodiesel yield, process parameters: methanol to oil ratio (A), catalyst loading (B) and reaction time (C) were optimized by applying response surface methodology based on full factorial design method. It was found that for KOH catalyzed condition, the optimum values for A, B and C are 7:1, 0.65 (w/w) % and 9.6 min, respectively and the model predicted yield is 96.44%. For CaO catalyzed condition, the optimum values for A, B and C are 9.6:1, 1.33 (w/w) % and 9.7 min, respectively and the predicted yield is 89.94%. Experiments were performed using the optimized parameters and the mean biodiesel yield determined for KOH and CaO catalyzed conditions are 96.55 ± 0.23% and 90.41 ± 0.02%, respectively which shows good agreement with model predictions. Analysis of perturbation plots showed that catalyst loading is the most sensitive variable. Considering pseudo-first-order kinetic, the activation energies were obtained and found to be 13.05 kJ mol-1 and 28.93 kJ mol-1 respectively for KOH and CaO catalyzed conditions. The activation energy observed for microwave-assisted method are significantly lower compared to that of conventional method. The scale-up study (with 10 fold batch-size) and energy analysis have been done for KOH and CaO catalyzed conditions whereas reusability was performed with CaO catalyst. It was observed that up to four cycles the biodiesel yield achieved was more than 90%. In microwave-assisted process, efficency factor found to be higher as compared to conventional method. The produced biodiesel properties fulfill fuel specifications designated as per ASTM D6751 standard. The outcome of microwave-assisted transesterification study enhances biodiesel yield and significantly decreases the reaction time, thus making it energy-efficient technique.
Ayse H Aksoy - One of the best experts on this subject based on the ideXlab platform.
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immobilized candida antarctica lipase catalyzed alcoholysis of Cotton Seed oil in a solvent free medium
Bioresource Technology, 2002Co-Authors: Oznur Kose, Melek Tüter, Ayse H AksoyAbstract:Abstract The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica , commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 °C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
H. Ayşe Aksoy - One of the best experts on this subject based on the ideXlab platform.
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Immobilized Candida antarctica lipase-catalyzed alcoholysis of Cotton Seed oil in a solvent-free medium.
Bioresource technology, 2002Co-Authors: Oznur Kose, Melek Tüter, H. Ayşe AksoyAbstract:The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica, commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 degrees C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
Melek Tüter - One of the best experts on this subject based on the ideXlab platform.
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immobilized candida antarctica lipase catalyzed alcoholysis of Cotton Seed oil in a solvent free medium
Bioresource Technology, 2002Co-Authors: Oznur Kose, Melek Tüter, Ayse H AksoyAbstract:Abstract The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica , commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 °C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
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Immobilized Candida antarctica lipase-catalyzed alcoholysis of Cotton Seed oil in a solvent-free medium.
Bioresource technology, 2002Co-Authors: Oznur Kose, Melek Tüter, H. Ayşe AksoyAbstract:The alcoholysis (transesterification) of the refined Cotton Seed oil of Turkish origin with primary and secondary alcohols was investigated in the presence of an immobilized enzyme from Candida antarctica, commercially called Novozym 435 in a solvent-free medium. The optimum conditions of the methanolysis were as follows: 30% enzyme based on oil weight; oil/alcohol molar ratio 1:4; temperature: 50 degrees C and reaction time: 7 h. Maximum methyl esters (ME) yield was 91.5%. At the same conditions Cotton Seed oil was converted with short-chain primary and secondary alcohols to its corresponding esters with conversions between 72% and 94%. Our results indicated that alcoholysis products of Cotton Seed oil could be used as valuable intermediates in oleochemistry.
