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Advancements in transition bimetal catalysts for electrochemical 5-hydroxymethylfurfural(HMF) oxidation

Journal of Energy Chemistry 2024年第11期98卷 24-46页

作者： Yuwei Li Huiting Huang Mingkun Jiang Wanlong Xi Junyuan Duan Marina Ratova Dan Wu Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Laboratory of Plasma Chemistry and New MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Faculty of Science and Engineering Manchester Metropolitan UniversityChester 12 StreetManchester M15GDUK

The electrochemical oxidation of 5-hydroxymethylfurfural(HMF) represents a significant avenue for sustainable chemical synthesis, owing to its potential to generate high-value derivatives from biomass feedstocks. Transition metal catalysts offer a cost-effective alternative to precious metals for catalyzing HMF oxidation, with transition bimetallic catalysts emerging as particularly promising candidates. In this review, we delve into the intricate reaction pathways and electrochemical mechanisms underlying HMF oxidation, emphasizing the pivotal role of transition bimetallic catalysts in enhancing catalytic efficiency. Subsequently, various types of transition bimetallic catalysts are explored, detailing their synthesis methods and structural modulation strategies. By elucidating the mechanisms behind catalyst modification and performance enhancement, this review sets the stage for upcoming advancements in the field, ultimately advancing the electrochemical HMF conversion and facilitating the transition towards sustainable chemical production.

关键词： HMF oxidation Transition metal catalysts Bimetallic catalysts Biomass valorization Electrocatalyst synthesis

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Electrolyte manipulation on Cu-based electrocatalysts for electrochemical CO_(2) reduction

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Journal of Energy Chemistry 2024年第12期99卷 201-222页

作者： Hexin Zhou Wanlong Xi Peng Yang Huiting Huang Jia Tian Marina Ratova Dan Wu Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Laboratory of Plasma Chemistry and New MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Faculty of Science and Engineering Manchester Metropolitan UniversityChester 12 StreetManchester M15GDUK

Electrocatalytic reduction of CO_(2)is crucial for environmental sustainability and renewable energy storage,with Cu-based catalysts excelling in producing high-value C_(2+)***,a comprehensive analysis of how specific electrolyte influences Cu-based catalysts is *** review addresses this gap by focusing on how electrolytes impact surface reconstruction and the CO_(2) reduction process on Cu-based electrocatalysts,identifying specific electrolyte compositions that enhance the density and stability of active sites,and providing insights into how different electrolyte environments modulate the selectivity and efficiency of C_(2+)product *** review begins by exploring how electrolytes induce favorable surface reconstruction in Cu-based catalysts,affecting surface roughness through dissolution-redeposition of Cu species and interactions with halogens and molecular *** also covers changes in crystalline facets of Cu and Cu_(2)O,and oxidation states,highlighting transitions from Cu^(0) to Cu^(δ+)and the stabilization of Cu^(+).The role of electrolytes in the C–C coupling process is examined,emphasizing their effects in modulating mass and charge transfer,CO_(2) adsorption,intermediate evolution,and product ***,the mechanisms by non-aqueous electrolytes,including organic solvents,ionic liquids,and mixed electrolytes,affecting CO_(2) reduction are analyzed,highlighting the unique advantages and challenges of each *** review concludes by addressing current challenges,proposing solutions,and research directions,such as optimizing electrolyte composition by integrating diverse cations and anions and employing advanced in-situ characterization *** insights can significantly enhance CO_(2)reduction performance on Cu-based electrocatalysts,advancing efficient and sustainable green energy technologies.

关键词： CO_(2)reduction reaction Cu-based catalyst Electrolyte Surface reconstruction Intermediates evolution

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The flow behavior of powder stearin-based methyl ester sulfonates and the effect of glidant

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Particuology 2023年第9期80卷 148-156页

作者： Zulina Abd Maurad Luqman Chuah Abdullah Mohd Shamsul Anuar Nor Nadiah Abdul Karim Shah Zainab Idris Malaysian Palm Oil Board 6Persiaran InstitusiBandar Baru Bangi43000SelangorMalaysia Department of Chemical and Environmental Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia Department of Process and Food Technology Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia

The preparation and behavior of powder stearin-based methyl ester sulfonates(MES)with the addition of builder as a glidant agent was *** is an anionic surfactant and its performance is equivalent to petroleum-based linear alkylbenzene sulfonates(LAS),the workhorses of the detergent *** the same time,zeolites or soda ash were the alternative builders for non-phosphate-based *** behavior of powder MES properties was measured in terms of morphology,particle size,cohesion,caking,and *** that,these palm stearin-based MES of carbon chain 16–18 with ratios of 98:2,80:20,and 60:40 in flakes were ground using a high shear mixer by 23,000 rpm to produce powder *** the particle size of MES powder can reduce the powder's cohesion,caking,and *** addition of zeolite or soda ash as a glidant in powdered MES can improve the caking *** high stearic in MES greatly influenced getting fine particle powders and required more glidant *** powder MES with excellent powder characteristics can perform well as a bio-based cleaning product.

关键词： Methyl ester sulfonates Caking Compaction Cohesion Glidant

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Recent advances in fibrous catalysts for CO2 conversion: A short review

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Materials Today: Proceedings 2022年 57卷 1027-1035页

作者： Miskan, S.N. Zaki, R.S. Mohd Bahari, M.B. Setiabudi, H.D. Jusoh, R. Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Gambang Pahang Kuantan26300 Malaysia

In recent years, CO2 conversion reactions such as CO2 reforming of CH4 and CO2 methanation have devoted significant attention on account of their advantages in utilizing greenhouse gases (CO2 and CH4). The development of an excellent catalyst with great properties is a crucial strategy in the catalytic reaction, as it could enhance the efficiency of reaction. Additionally, the tunable characteristics of support materials may influence the distribution of active metal sites, strength of metal-supporting interactions, and amount of oxygen vacancies. To improve metal dispersion on a support, the production of support materials with fibrous morphology and dendrimeric structures is becoming an exciting approach. This short review highlighted recent developments in the preparation of fibrous catalysts and their relation with the physical and chemical properties of catalyst. This article also discussed the governing factor of fibrous morphology in CO2 conversions. Owing to the fascinating physicochemical properties of fibrous catalyst, further research is needed to explore its potential in various applications. © 2021

关键词： Carbon dioxide

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Determination of significant factors for sugarcane fiber extraction as potential dielectric composite material

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Discover Mechanical engineering 2024年第1期3卷 1-12页

作者： Zainol, Norazwina Radzi, Mohamad Eizlan Mohammad Aziz, Nor Hazwani Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Pahang Kuantan 26300 Malaysia

This study aims to determine the significant factors involved in the extraction of sugarcane fiber as a potential dielectric composite material. The factors include sugarcane waste weight (0.5 and 2.5 g), ratio of sugarcane waste to distilled water (1:15 and 1:20), boiling time (30 and 50 min), and cutting length (5 and 10 cm). The factors were analyzed using the Design-Expert software through a two-level factorial analysis to determine the significant factor. The extracted fiber was analyzed for cellulose content using a Kurschner-Hanack method, and the permittivity value was determined through an Agilent vector network analyzer (VNA). The results show that the ratio of sugarcane waste to distilled water and boiling time were the two most significant factors contributing to the cellulose content and permittivity value of the extracted fiber. The best conditions for sugarcane extraction were obtained at 2.5 g sugarcane waste, 1:20 ratio of sugarcane waste to distilled water, 50 min boiling time, and cutting length of 10 cm, resulting in 47.25% cellulose and 3.12 permittivity value. The findings of this study suggest that sugarcane waste could be a potent material for dielectric composite with a suitable application as a microwave absorber. © The Author(s) 2024.

关键词： Cellulose content Dielectric materials Factorial analysis Permittivity value Sugarcane waste

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Hydrogel microspheres containing dextran-based nanoparticles as novel anticancer drug delivery system

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2022年第3期43卷 405-417页

作者： Kulikowska-Darlak, Aleksandra Stefanek, Agata Wasiak-Wojasińska, Iga Wiechecka-Ożdżyńska, Paulina Ciach, Tomasz Faculty of Chemical and Process Engineering Warsaw University of Technology Waryńskiego 1 Street Warsaw00-645 Poland

Developing an effective and safe cancer therapy could significantly reduce the number of deaths and improve the quality of life of treated patients. Nowadays medicine has developed a wide range of anticancer chemotherapeutics but at the same time there is a lack of effective drug delivery methods. Therefore, the development of the targeted drug delivery system which will selectively release drug into the cancer cells is a key challenge of modern medicine. The main aim of the presented research was to investigate the targeting effect of a drug delivery system based on the controlled release of dextran nanoparticles containing the anticancer drug - doxorubicin from the alginate microspheres coated with chitosan multilayers. During the research the physicochemical properties of the alginate microspheres and its stability in the physiological environment were investigated. Moreover, the kinetics of the nanoparticles with doxorubicin release from the alginate microspheres covered with chitosan multilayers was characterized, depending on the thickness of the chitosan layer. Further, the cytotoxicity study of the alginate microspheres covered with chitosan multilayer and containing nanoparticles was performed to determine the therapeutic effect of the released nanoparticles with doxorubicin on the HeLa cells during the in vitro cell culture. © 2022 Polish Academy of Sciences. All rights reserved.

关键词： Nanoparticles

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The role of Gemini surfactant and SiO2/SnO/Ni2O3 nanoparticles as flow improver of Malaysian crude oil

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Journal of King Saud University - engineering Sciences 2022年第7期34卷 384-390页

作者： VijayaKumar, S.D. Zakaria, J. Ridzuan, N. Faculty of Chemical Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Pahang Kuantan26300 Malaysia

The addition of surfactants and nanoparticles in minimizing wax deposition related problems such as flow assurance is considered an attractive alternative among other techniques but limited researches have been carried out in investigating the method. High viscosity crude oil needs to be treated with viscosity reducer to facilitate transportation and processing. In this study, the efficiency of the viscosity reducer, a Gemini surfactant 2,5,8,11 Tetramethyl 6 dodecyn-5,8 Diol Ethoxylate, three different nanoparticles: silicon dioxide (SiO2), tin oxide (SnO) and nickel (III) oxide (Ni2O3) and their novel blends at different range of concentration, temperature, shear rate and surfactant/nanoparticle loading ratio are assessed in order to study their influence on the viscosity of Malaysian crude oil using Brookfield DV-III viscometer. The separate use of Gemini surfactant and nanoparticles alone resulted in significant reduction in crude oil viscosity. The combined use of Gemini surfactant and nanoparticles showed better performance as compared to their corresponding individual use. The presence of surfactant improves the adsorption of nanoparticles by functionalizing their surfaces. Adsorption and adhesion of wax molecules onto the surface of nanoparticles and surfactants prevents them from aggregating. This results in increment in viscosity reduction. Overall, the viscosity of crude oil was reduced about 85–92% at 10 ℃ with the aid of Gemini surfactant and nanoparticles. The highest viscosity reduction obtained was 92.8% using the blend of Gemini surfactant and silicon dioxide. The findings of the study are expected to contribute to the crude oil industry in improving flow in production and transportation. © 2021 The Authors

关键词： Viscosity

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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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