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Liquefied dimethyl ether as alternative extraction solvent for high γ-oryzanol rice bran oil:Systematic HSP theory and experimental evaluation

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Journal of Bioresources and Bioproducts 2024年第4期9卷 577-591页

作者： Phannipha Daisuk Seiichi Takami Masaki Honda Motonobu Goto Chonlatep Usaku Artiwan Shotipruk Bio-Circular-Green-economy Technology&Engineering Center BCGeTECDepartment of Chemical EngineeringFaculty of EngineeringChulalongkorn UniversityBangkok 10330Thailand Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan Department of Chemistry Faculty of Science&TechnologyMeijo UniversityShiogamaguchiTempaku-kuNagoyaAichi 468-8502Japan Super Critical Technology Centre Co.Ltd. Kuwan1Mie 511-0838Japan Research Unit on Sustainable Algal Cultivation and Applications Faculty of EngineeringChulalongkorn UniversityBangkok 10330Thailand

This study aimed to systematically find an alternative solvent to replace hexane for the extraction of bio-oil with high𝛾-oryzanol content from rice bran(RB).The selection involved predicting solubility through Hansen solubility theory,experimental validation,determination of suitable extraction conditions,and comparison of oil quality with that of conventional hexane.A wide variety of solvents:subcritical water(SCW),supercritical carbon dioxide(SCCO_(2)),bio-based sol-vents(alcohols and terpenes),and liquefied dimethyl ether(LDME),were initially assessed for rice bran oil(RBO)and𝛾-oryzanol solubility using Hansen solubility *** demon-strating high solubility for both RBO and𝛾-oryzanol,including LDME,ethyl acetate,acetone,and others(alcohols and SCCO_(2))known for effective vegetable oil extraction,were selected/identified for experimental extraction *** these,LDME performed better overall,affording greater solubility and requiring less solvent,shorter duration,lower pressure,and no additional co-solvents for equivalent *** conditions for LDME extraction were identified as 30℃ with a solvent-to-sample ratio of 10 mL/g and an extraction time of 10 *** extracted with LDME and hexane displayed similar fatty acid compositions and no adverse effects on RB protein and carbohydrate structures after LDME extraction were *** study demon-strates LDME as a promising alternative to replace hexane for RBO extraction to further valorize this abundant low-cost RB residue into bio-oil and its𝛾γ-oryzanol and de-oil RB co-products.

关键词： Rice bran oil γ-oryzanol Liquefied dimethyl ether Hansen solubility sphere Fourier transform infrared

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Performance Evaluation of Alkali Activated Kaolinite Clay as Oil and Gas Geopolymer Cement

Performance Evaluation of Alkali Activated Kaolinite Clay as...

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2024 Offshore technology Conference Asia, OTCA 2024

作者： Melia, A. Gbadamosi, A. Agi, A. Oseh, J. Junin, R. Department of Petroleum Engineering School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Malaysia Department of Petroleum Engineering College of Petroleum and Geosciences King Fahd University of Petroleum and Minerals Saudi Arabia Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Pahang Malaysia

ISBN: (纸本)9781959025030

With the increasing awareness against global warming, it is imperative to substitute Portland cement that has been used in the oil and gas industry due to huge emission of carbon dioxide (CO2) associated with its production Recently, geopolymer cement has been identified as a suitable alternative because of its environmentally benign nature and can meet the specifications of oil and gas wells. The use of kaolinite clay, which comes from natural resource as the base material contributes to the environmental sustainability and makes the cementing material cost-effective. The aim of this research is to study the effect of several external exposures curing temperatures and hydration time on kaolinite clay based Geopolymer cement. Firstly, two samples were prepared under four different curing temperatures including ambient temperature (23°C), 40°C, 60°C, and 80°C. The strongest samples from four curing temperatures were taken and cured at three different hydration times of 24 h, 72 h and 120 h. To determine the acid resistance of the samples, they were soaked in acid solution for 24 h and 72 h, 3%/12% of HF/HCl. The result shows that geopolymer cement appeared to have higher compressive strength under higher temperature and acidic condition. Moreover, geopolymer cement has better mechanical properties compared to conventional cement. The outcome of this study is beneficial for ensuring environmental sustainability in oil and gas well cementing process. Copyright © 2024, Offshore technology Conference.

关键词： Curing Geopolymer cement Kaolinite clay Oil and gas cement Sustainability

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PROVING BIOACTIVE COMPOUNDS AND ANTIOXIDANT ACTIVITIES OF AJUGA REMOTA BENTH LEAVES EXTRACT: IMPACT OF ULTRASONIC POWER, SONICATION TIME, AND CONVENTIONAL EXTRACTION PARAMETERS

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Acta Universitatis Cibiniensis - Series E: Food technology 2024年第1期28卷 33-40页

作者： Zerihun-Chala, Meseret Admassu-Emire, Shimelis Benjakul, Soottawat Worku-Dadi, Debebe Temdee, Wattana Department of Food Process Engineering College of Engineering and Technology Wolkite University Wolkite Ethiopia School of Chemical and Bioengineering Institute of Technology Addis Ababa University Addis Ababa Ethiopia International Centre of Excellence in Seafood Science and Innovation Faculty of Agro-Industry Prince of Songkla University Hat Yai Songkhla90110 Thailand Department of Food Process Engineering and Postharvest Technology Institute of Technology Ambo University Ambo Ethiopia

Ajuga remota Benth plant contains a variety of phytochemicals including phenolic compounds with potent antioxidant activities. However, in order to improve the extraction efficiency, green technologies need to be used while extracting bioactive compounds. Therefore, this study was aimed to determine the impact of ultrasonic power and extraction time on the extract yield, bioactive compounds and antioxidant activities of A. remota leaves extract. Ultrasonic assisted extraction (UAE) was employed at amplitude of 50, 60 and 70% with the sonication time of 10 and 20 min. The highest total phenolic content (44.14 mg GAE/ g) and flavonoids content (126 mg QE/g), and antioxidant activities 100.11 mg TE/g, 263.97, mg TE/g and 286.19 mg TE/g for DPPH, FRAP and ABTS, respectively, were found at 70 % ultrasonic power with the extraction time of 10 min. Thus, UAE showed a significant (p © 2024 Sciendo. All rights reserved.

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Advancements in MXene-Based Photocatalysis: Unleashing Its Potential for Enhanced Water Treatment processes

Advancements in MXene-Based Photocatalysis: Unleashing Its P...

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International Conference on Wider-Uptake of Water Resource Recovery from Wastewater Treatment, ICWRR 2024

作者： Grzegórska, Anna Zielińska-Jurek, Anna Department of Process Engineering and Chemical Technology Faculty of Chemistry Gdańsk University of Technology G. Narutowicza 11/12 Gdańsk80-233 Poland

ISBN: (纸本)9783031633522

Water contamination with active pharmaceutical ingredients (APIs) is a pressing environmental issue due to the potential impact on fauna, flora, and human health. To address this problem, we propose the use of photocatalysis as an effective method for the degradation of emerging contaminants present in water. Our research focuses on the application of MXene compounds in the photocatalytic degradation of APIs such as carbamazepine, acetaminophen, and ibuprofen. These substances are classified as persistent organic pollutants and emerging contaminants, which are among the pharmaceuticals commonly found in aquatic ecosystems worldwide. In the present work, the Ti3C2Tx was used as a co-catalyst for photocatalytic processes and as a precursor to obtain TiO2/Ti3C2 composites. Additionally, we propose methods for modifying TiO2/Ti3C2 composites with metal particles, such as iron and copper, and spinel ferrite of MnFe2O4 to improve their physicochemical properties. The surface modification of the composites with metals resulted in higher photocatalytic activity in the degradation of APIs under UV-vis irradiation. Moreover, the introduction of magnetic MnFe2O4 nanoparticles enabled the effective separation of the photocatalyst after the degradation process. Finally, our research demonstrates the potential for synergism between photocatalysis and the activation of peroxymonosulfate (PMS) with Cu or MnFe2O4, leading to the production of highly reactive sulfate radicals and enhanced degradation of APIs. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Physicochemical properties

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The Influences of the Fluid Initial Temperature and Fluid Flow Rate to the Boiling Heat Transfer: A Short Review 3

The Influences of the Fluid Initial Temperature and Fluid Fl...

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3rd International Postgraduate Conference on Mechanical engineering 2024, IPCME 2024

作者： Shaidan, Faiz Basrawi, Firdaus Yudin, Ahmmad Shukrie Md Azman, Nurul Aini Mohd Faculty of Mechanical and Automotive Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Pekan Pahang26600 Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Gambang Pahang26300 Malaysia

Recently, Low Temperature Vacuum Drying with induced Nucleation Boiling (LTVD-NB) has been studied for water reduction methods. However, low dewatering temperature led to longer drying process. Hence, to improve the LTVD-NB dewatering performance, the study on Boiling Heat Transfer (BHT) such as parameters, conditions and phenomena that may affect the heat transfer in boiling process should be understood further. Currently, some of parameters such as dewatering temperature, surface roughness, and initial water content effects in LTVD-NB have been discovered. However, the effect of the fluid initial temperature and hot water flow rate to the BHT in LTVD-NB is still unclarified. Hence, the objective of this paper is to review and examine the influences of fluid initial temperature and the effect of fluid flow rate to the BHT. In general, the result shows that the higher fluid initial temperature and flow rate significantly enhanced the BHT. As a result, the BHT in LTVD-NB system can be improved which will significantly improve the dewatering process of honey in the future. © Published under licence by IOP Publishing Ltd.

关键词： Low temperature drying

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Effect of torrefaction on thermal degradation and functional group of oil palm solid waste

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Materials Today: Proceedings 2022年 57卷 1248-1255页

作者： Chang, Siaw Sang Sambeth, Sharwin Kumar Abdul Samad, Noor Asma Fazli Saleh, Suriyati Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Pahang Gambang26300 Malaysia Chemical Engineering Department College of Engineering Universiti Malaysia Pahang Pahang Gambang26300 Malaysia

This study investigated the influence of the torrefaction process on thermal degradation and chemical changes of oil palm solid waste (OPSW) through thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) analysis. Palm kernel shell (PKS) showed the highest mass and energy yield after the torrefaction process. Furthermore, torrefied PKS (TPKS) showed the highest heating value (23.10 MJ/kg). Weight loss in active pyrolysis stages was reduced after the torrefaction, thus indicates the lignocellulosic component decomposition. OPSW showed a reduction in hydroxyl group (−OH) after torrefaction resulting in hydrophobicity characteristic. Torrefaction has significantly enhanced the characteristics of OPSW as solid biofuel. © 2021

关键词： Biofuels

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Breakdown Strength and Fire Retardancy Performance of LLDPE/NR/SiO2 Nanocomposite as High Voltage Insulation 1

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6th International Conference on Advances in Manufacturing and Materials engineering, ICAMME 2024

作者： Michael, M. Makmud, M.Z.H. Badi, N.S.A. Jamain, Z. Amin, K.N.M. Illias, H.A. Research Group Faculty of Science and Natural Resources Universiti Malaysia Sabah Sabah Kota Kinabalu Malaysia Faculty of Chemical and Process Engineering Technology College Engineering Technology Universiti Malaysia Pahang Pahang Kuantan Gambang Malaysia Department of Electrical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia

ISBN: (数字)9789819638147

ISBN: (纸本)9789819638130

The rising demand for electricity has increased the need for an efficient high voltage (HV) system. This research investigates the capability of LLDPE/NR/SiO2 nanocomposite as a HV insulation material. A series of samples was fabricated using a twin-screw extruder followed by a hot press to prepared LLDPE/NR/SiO2 nanocomposite to test the effectiveness of the SiO2 with percentage addition of 0, 2, 4 and 6 wt%, respectively. The breakdown strength of the nanocomposite samples was evaluated by using the ASTM-D149 procedure, while the fire retardancy property was measured according to the Limiting Oxygen Index (LOI) test standard. As a result, the addition of SiO2 at 2wt% shows the highest value of BDV and LOI when compared to others. In addition, as the concentration of SiO2 increases, the value of BDV and LOI decreases due to aggregate formation. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Electric insulation

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Opportunities of biodiesel industry waste conversion into value-added products

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Materials Today: Proceedings 2022年 57卷 1014-1020页

作者： Chilakamarry, Chaitanya Reddy Sakinah, A.M. Mimi Zularisam, A.W. Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Gambang Pahang Kuantan26300 Malaysia Faculty of Civil Engineering Technology Universiti Malaysia Pahang Gambang Pahang Kuantan26300 Malaysia

The global attention for the alternative fuel to decrease the dependence on carbon-biased fossil fuels and reduce the carbon footprint led to biodiesel production. Crude glycerol generated as a major by-product of the biodiesel industry. The vast amounts of crude glycerol pose an environmental threat. Valorisation of industrial waste is the big challenge to provide a significant economic advantage by the sustainable approach. Hence the crude glycerol needs to be valorised through the biotechnology process into value-added products and gives biodiesel producers more revenue. The biodiesel industrial by-product glycerol waste serves as raw material to convert into several products like citric acid, succinic acid, 1,3-propanediol, butanol, and ethanol. The present manuscript focuses on the significance of crude glycerol from the biodiesel industry as a stable feedstock that undergoes biotransformation to value-added products by microorganisms. © 2021

关键词： Biodiesel

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Low-Cost Battery Capacity Tester with Online Monitoring for Educational Use 12

Low-Cost Battery Capacity Tester with Online Monitoring for ...

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12th International Electrical engineering Congress, iEECON 2024

作者： Phantanaikasem, Pongpavee Pannawan, Akekachai Jamroen, Chaowanan Suttikul, Thitiporn King Mongkut's University Of Technology North Bangkok Division Of Instrumentation And Automation Engineering Technology Faculty Of Engineering And Technology Rayong Campus Rayong21120 Thailand King Mongkut's University Of Technology North Bangkok Division Of Chemical Process Engineering Technology Faculty Of Engineering And Technology Rayong Campus Rayong21120 Thailand

ISBN: (纸本)9798350383591

Lithium-ion batteries (LIBs) are conventionally used as power supplies of portable electric devices (such as mobile phones and laptops) due to their small sizes, affordability, and long cycle lives. However, the capacity of LIBs gradually decreases from their rated value (referred to as capacity fading) depending on the number of charge cycles. Inaccurate LIB capacity estimation leads to imprecise state-of-charge (SoC) estimation, negatively impacting energy management capabilities. Conventional battery capacity testers presently on the market are expensive and lack Internet of Things (IoT) capabilities for storage and monitoring. Therefore, this study presents a low-cost battery capacity tester with online monitoring for educational purposes. This tester offers two discharging levels of 0.5 A and 1 A. Additionally, a temperature sensor has been integrated to monitor the battery's temperature and prevent overheating. The tester employs an ESP32 module as the main microcontroller, and the Arduino IoT Cloud system is used to store measurement data in a cloud database. The voltage and current during testing can be conveniently displayed on a computer or mobile phone through an associated graphical user interface (GUI). Two LIBs were subjected to testing at both discharging levels to validate the capabilities of the tester. The experimental results revealed a maximum error of 1.7% and a minimum error of 0.25%. © 2024 IEEE.

关键词： Internet of things

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Production of Bricks Using Spent Diatomaceous Earth Used in Brewing Industry 12th

Production of Bricks Using Spent Diatomaceous Earth Used in ...

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12th International Conference on Structural engineering and Construction Management, ICSECM 2021

作者： Nanayakkara, Rumesh Gunathilaka, Chamila Department of Chemical and Process Engineering Faculty of Engineering University of Peradeniya Peradeniya20400 Sri Lanka Department of Nano Science Technology Faculty of Technology WUSL Kuliyapitiya60200 Sri Lanka

ISBN: (纸本)9789811928857

In breweries, diatomaceous earth (DE) is used as a filter material. Spent diatomaceous earth (SDE), as an industrial waste, is mainly generated once this DE pores are filled with impurities generated from brewing industries. After the final filtering process, this spent DE is disposed into dumping areas leads to environmental pollution. Therefore, as a remedy for that problem, SDE can be adulterate with clay to produce bricks. Mixing clay with SDE leads to an increase in the quality of the bricks. Also, the incorporation of SDE for brick production can reduce the adverse effects on the environment by reducing the quantity of clay excavated and discharged SDE. This study was conducted to analyze the suitability of using SDE as a secondary raw material for brick production. The chemical characteristics of SDE were analyzed using both XRF and TGA tests. Bricks containing 0, 5, 10, and 15 wt% of SDE were sun-dried and fired at 950 ℃ for 6 h with suitable temperature ramp. The obtained results reveal that compressive and bending strengths were increased with increasing the SDE weight percentage. Highest compressive strength (4.78 MPa) and bending strength (0.57 MPa) were recorded for the sample prepared with 15 wt% of SDE. Furthermore, the addition of SDE is worth as no significant differences in physical properties are observed. To produce SDE incorporated bricks on a large scale, further research and development by considering, the technical, economic, and environmental aspects of SDE are recommended. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Brick

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