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SSRN 2024年

作者： Colom, Xavier Marín, M. Saeb, M.R. Formela, K. Cañavate, J. Department of Chemical Engineering ESEIAAT-UPC Colom 1 Terrassa08222 Spain Department of Mechanical Engineering ETSEQ-URV Països Catalans 26 Tarragona45002 Spain Department of Pharmaceutical Chemistry Medical University of Gdańsk J. Hallera 107 Gdańsk80-416 Poland Department of Polymer Technology Faculty of Chemistry Gdansk University of Technology Gabriela Narutowicza 11/12 Gdansk80–233 Poland

Ethylene propylene diene rubbers (EPDM) have gained substantial attention in automotive and industrial applications owing to their exceptional resistance against weathering and heat. Despite their advantages, the elastomeric nature of EPDM poses challenges in its recycling due to the presence of crosslinks in their chemical structure, preventing them from melting. To overcome this issue, devulcanized EPDM (EPDMd) has been developed, characterized by the effective breaking of these crosslinks. Our study focuses on the SBR/EPDMd combination, also incorporating silica, a widely used formulation for *** research aimed to collect comprehensive data on the mechanical, thermal, structural and dielectric properties of SBR composites containing EPDMd at variable compositions (0, 20, 40, 50, 60 phr). Employing techniques such as TGA, FTIR, and SEM, we explored the microstructural changes underlying the evident macroscopic effects on the measured *** results show that incorporating EPDMd improves the crosslinking degree and, at optimal 40 phr loading significantly boosts the mechanical properties of SBR matrix. The addition of SiO2 reduce tensile strength and elongation, while increasing the Young's modulus. Interestingly, this trend diverges for compositions around 40 phr EPDMd. This irregularity can be attributed to the complex microstructural changes resulting from the interaction between SiO2 and EPDMd, alongside the different dispersion states of these materials in the SBR matrix. Additionally, our dielectric measurements are in concordance with the obtained results, indicating a moderation of the MWS effect due to the addition of SiO2 in highly-filled EPDMd composites, particularly at the EPDMd content of 40 phr. © 2024, The Authors. All rights reserved.

关键词： Silica

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Nafion membranes for power generation from physiologic ion gradients

RSC Applied Polymers

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RSC Applied Polymers 2024年第1期3卷 209-221页

作者： Pierucci, Carolina Paleari, Lorenzo Baker, James Sproncken, Christian C. M. Folkesson, Matilde Wesseler, Justus Paul Vracar, Andela Dodero, Andrea Nanni, Francesca Berrocal, José Augusto Mayer, Michael Ianiro, Alessandro Adolphe Merkle Institute University of Fribourg Chemin des Verdiers 4 Fribourg CH-1700 Switzerland Dep. Enterprise Engineering University of Rome Tor Vergata Via del Politecnico 1 Rome 00133 Italy Dep. Electrical Engineering Saint Louis University 1 N Grand Blvd Saint Louis MO United States Dep. of Chemistry Catholic University of Leuven Celestijnenlaan 200F Leuven 3001 Belgium National Center for Competence in Research (NCCR) Bio-inspired Materials University of Fribourg Chemin des Verdiers 4 Fribourg CH-1700 Switzerland Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 Tarragona E-43007 Spain

Creatures such as torpedo rays and electric eels showcase the exceptional ability to convert ionic gradients inside their bodies into powerful electrical discharges. In the future, artificial power units capable of reproducing this intriguing biological phenomenon may be able to power active devices, such as pacemakers and prosthetics, directly from ion gradients present in the human body. The present work evaluates the use of proton-selective Nafion membranes to generate electric power from the pH gradient present in the human stomach. First, we characterize two different commercial Nafion membranes by focusing on their ion exchange performance. In particular, we quantify the perm-selectivity of these membranes for various hydrated ions relative to that of the hydronium ion. Our results indicate that the transport of ions in wet Nafion proceeds through water-filled nanochannels, and that proton selectivity can be explained simply by the much larger mobility of protons in water with respect to other ions. Subsequently, we demonstrate a Nafion-based artificial electric organ capable of generating electric power from gastric juices. This power unit is built according to the reverse electrodialysis (RED) scheme, with each cell stack in series capable of generating 134 mV of potential difference and 188 mW m⁻² of power density. © 2025 RSC.

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A context-aware energy saving information centric (CAES) model for wireless communication network

Journal of Engineering Research (Kuwait)

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Journal of engineering Research (Kuwait) 2024年

作者： Verma, Ravi Soni, Dheresh Goyal, Ankur Gupta, Manoj Alanazi, Faisal Nanthaamornphong, Aziz School of Computing Science and Engineering VIT University Madhya Pradesh Bhopal India Department of CSE Symbiosis International Deemed University Symbiosis Institute of Technology Maharashtra Pune India Department of Electrical Engineering SoS- Engineering & Technology Guru Ghasidas Vishwavidyalaya Chhattisgarh Bilaspur India Shinawatra University (Metharath University) Pathum Thani 12160 Thailand Department of Electrical Engineering College of Engineering Prince Sattam bin Abdulaziz University Al Kharj 16278 Saudi Arabia College of Computing Prince of Songkla University Phuket Campus Phuket Thailand

The CASE model improves the traditional wireless communication approach by deploying an energy-efficient information-centric algorithm that also enables the tiny low-powered communication nodes of the wireless network to work efficiently with the context-aware energy-saving interface. CAES introduces buffer optimization and a smart routing process among all the low-capacity tiny nodes. Moreover, the gathering of Context-aware energy-saving information also takes care of the performance as well as the management of the traffic load of the entire wireless network. Toward the objectives of the proposed algorithm, which ensure a high ratio of content delivery with an efficient energy saving and energy utilizing scheme, this paper is trying to design a type of Wi-Fi environment that carry the data packet and delivery services carefully without falling down the connection or losing the data contents. In addition to this, this paper concentrate on the measurement of Expected Production Quality (EPQ) values, using loss and quality functions based on various quality parameters to be calculated as one of the measured parts of this research work that defines the ratio of reliability and efficiency of CAES. Further, the implementation of CAES defines the improvement of this research work in the form of managing various quality of communication parameters such as packets delivery ratio, end-to-end Delay and throughput measurement. This manuscript proposes a novel version of the context-aware routing mechanism in a wireless network since traditional wireless communication protocols like SADODV, RAEED-EA are not vulnerable to offer best of communication services. This work aims to manage common communication quality parameters such as Packet Delivery Ratio, End to End Delay and Throughput to be improved using information-centric route management services under denial-of-service (DoS) attacks by implementing context-aware energy saving (CAES), which simultaneously deploys energy ef

关键词： Buffer optimization Context-aware routing Data loss Energy efficiency Wireless network

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Carbon dioxide chemistry towards carbon-neutrality

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Green Chemical engineering 2022年第2期3卷 93-95页

作者： Shoubhik Das Valerio D'Elia Liang-Nian He Arjan W.Kleij Tohru Yamada Department of Chemistry Universiteit AntwerpenAntwerp2020Belgium Department of Materials Science and Engineering School of Molecular Science and EngineeringVidyasirimedhi Institute of Science and Technology(VISTEC)555 Moo 121210PayupnaiWangChanRayongThailand State Key Laboratory and Institute of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin300071China Institute of Catalan Research and Advanced Studies(ICREA) Pg.Lluis Companys 2308010BarcelonaSpain Institute of Chemical Research of Catalonia(ICIQ) Barcelona Institute of Science&TechnologyAv.Països Catalans 1643007TarragonaSpain Department of Chemistry Keio UniversityHiyoshiKohoku-kuYokohamaKanagawa223-8522Japan

Startling rise of carbon dioxide concentration in the atmosphere has become a serious concern to scientists and ***,reduction of CO_(2) will be ideal to save the future world but increasing number of pop-ulation and theirbelongings is the major drawback to imply *** Covid-19 pandemic reduced the CO_(2) concentration temporarily in the last two years,but still carbon dioxide concentrations are ata recordhigh.

关键词： dioxide carbon neutral

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Emerging trends in hydrogen and synfuel generation: a state-of-the-art review

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Environmental Science and Pollution Research 2024年第30期31卷 42640-42671页

作者： Alhassan, Mansur Jalil, Aishah Abdul Owgi, Abdelrahman Hamad Khalifa Hamid, Muhamed Yusuf Shahul Bahari, Mahadi Bin Van Tran, Thuan Nabgan, Walid Hatta, Abdul Hakim Khusnun, Nur Farahain Binti Amusa, Abiodun Abdulhameed Nyakuma, Bemgba Bevan Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Skudai81310 Malaysia Centre of Hydrogen Energy Institute of Future Energy Universiti Teknologi Malaysia Johor Skudai81310 Malaysia Department of Chemistry Sokoto State University P. M. B 2134 Airport Road Sokoto Nigeria Faculty of Science Universiti Teknologi Malaysia Johor Skudai81310 Malaysia Institute of Applied Technology & Sustainable Development Nguyen Tat Thanh University 298-300A Nguyen Tat Thanh District 4 HCMC 755414 Viet Nam Departament d’Enginyeria Química Universitat Rovira i Virgili Av Països Catalans 26 Tarragona43007 Spain Department of Chemical Sciences Faculty of Science and Computing Pen Resource University P.M.B 0198 Gombe State Gombe Nigeria

The current work investigated emerging fields for generating and consuming hydrogen and synthetic Fischer-Tropsch (FT) fuels, especially from detrimental greenhouse gases, CO2 and CH4. Technologies for syngas generation ranging from partial oxidation, auto-thermal, dry, photothermal and wet or steam reforming of methane were adequately reviewed alongside biomass valorisation for hydrogen generation, water electrolysis and climate challenges due to methane flaring, production, storage, transportation, challenges and opportunities in CO2 and CH4 utilisation. Under the same conditions, dry reforming produces more coke than steam reforming. However, combining the two techniques produces syngas with a high H2/CO ratio, which is suitable for producing long-chain hydrocarbons. Although the steam methane reforming (SMR) process has been industrialised, it is well known to consume significant energy. However, coke production via catalytic methane decomposition, the prime hindrance to large-scale implementation of these techniques for hydrogen production, could be addressed by coupling CO with CO2 conversion to alter the H2/CO ratio of syngas, increasing the reaction temperatures in dry reforming, or increasing the steam content fed in steam reforming. Optimised hydrogen production and generation of green fuels from CO2 and CH4 can be achieved by implementing these strategies. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Steam reforming

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Synthesis of bio-sourced liquid resins and their photopolymerization with poly(ethylene glycol) diacrylate in the roadmap to more sustainable digital light processing technologies

RSC Applied Polymers

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RSC Applied Polymers 2024年第2期2卷 284-295页

作者： Hodásová, Ľudmila Isarn, Isaac Bravo, Fernando Alemán, Carlos Borràs, Núria Fargas, Gemma Armelin, Elaine IMEM-BRT Group Departament d'Enginyeria Química EEBE Universitat Politècnica de Catalunya (UPC) C/d'Eduard Maristany 10-14 Edifici I Barcelona 08019 Spain Barcelona Research Center for Multiscale Science and Engineering Universitat Politècnica de Catalunya (UPC) C/d'Eduard Maristany 10-14 Edifici IS Barcelona 08019 Spain Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 Tarragona 43007 Spain Institute for Bioengineering of Catalonia (IBEC) The Barcelona Institute of Science and Technology Baldiri Reixac 10-12 Barcelona 08028 Spain CIEFMA Group Departament de Ciencia i Enginyeria dels Materials EEBE Universitat Politècnica de Catalunya (UPC) C/d'Eduard Maristany 10-14 Edifici I Barcelona 08019 Spain

Non-fossil feedstocks for the production of photocurable resins have attracted growing interest from the scientific community and industry in order to achieve more sustainable 3D-printing technologies. Herein, we report the successful photopolymerization process of three diallyl ester monomers, derived from succinic acid, d,l-malic acid and l-(+)-tartaric acid (natural acids), with poly(ethylene glycol) diacrylate, a petroleum-based co-monomer well-known for its fast UV light reaction response. The existence of hydroxyl groups beside the ester units in the malic and tartaric compounds did not influence either the kinetics or the thermal stability of the thermoset polymers. Therefore, the most prominent composition was formed by 50 wt% of the bio-derived diallyl succinate, and 50 wt% of the synthetic, having excellent thermal stability and very good dimensional resolution and transparency in DLP printed samples after light curing, and most importantly, such samples promptly undergo hydrolytic degradation thanks to the presence of the ester linkages that are incorporated by the natural monomer. © 2024 RSC.

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Thermodynamic and Process Modeling of Deep Eutectic Solvents for CO2 Capture and Separation at Industrial Conditions 15

Thermodynamic and Process Modeling of Deep Eutectic Solvents...

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15th Greenhouse Gas Control Technologies Conference, GHGT 2021

作者： Alkhatib, Ismail I.I. Bahamon, Daniel Albà, Carlos G. Llovell, Felix Vega, Lourdes F. Khalifa University of Science and Technology P.O. 127788 Abu Dhabi United Arab Emirates Chemical Engineering Department Khalifa University of Science and Technology P.O. 127788 Abu Dhabi United Arab Emirates Khalifa University of Science and Technology P.O. 127788 Abu Dhabi United Arab Emirates Campus Sescelades Av. Països Catalans 26 Tarragona43007 Spain

The drawbacks of aqueous alkanolamines for CO2 capture at large scale fueled the progress towards the development of alternative solvents such as deep eutectic solvents. However, further knowledge is still required to bridge the gap between lab-scale measurements and the performance of these emerging solvents at industrial scale process conditions. Hence, this contribution is devoted to evaluating the techno-economic feasibility of deep eutectic solvents for CO2 capture through integrating process modeling with a molecular-based equation of state, soft-SAFT. The evaluation is done based on key performance indicators for physical absorption process such as CO2 cyclic capacity, energy of regeneration and total annualized cost. © 2021 15th Greenhouse Gas Control Technologies Conference 2021, GHGT 2021. All Rights Reserved.

关键词： Carbon dioxide

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Cu-loaded C₃N₄-MgO nanorods for promising antibacterial and dye degradation

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Applied Nanoscience (Switzerland) 2022年第8期12卷 2443-2458页

作者： Akbar, M.U. Ikram, M. Imran, M. Haider, A. Ul-Hamid, A. Dilpazir, S. Shahzadi, I. Nazir, G. Shahzadi, A. Nabgan, W. Haider, J. Solar Cell Applications Research Lab Department of Physics Government College University Punjab Lahore 54000 Pakistan State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Centre for Soft Matter Science and Engineering Beijing Engineering Center for Hierarchical Catalysts Beijing University of Chemical Technology Beijing 100029 China Faculty of Veterinary and Animal Sciences Muhammad Nawaz Shareef University of Agriculture Punjab Multan 66000 Pakistan Core Research Facilities King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing China Punjab University College of Pharmacy University of the Punjab Lahore 54000 Pakistan Department of Nanotechnology and Advanced Materials Engineering Sejong University Seoul 05006 South Korea Faculty of Pharmacy University of the Lahore Lahore Pakistan School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Skudai 81310 Malaysia Departament d’Enginyeria Química Universitat Rovira I Virgili Av Països Catalans 26 Tarragona 43007 Spain Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences Tianjin 300308 China

Photocatalytic and magnetic stability of two-dimensional nanomaterials is enhanced by metal doping, which is an environmentally friendly technique used in various industries. There is an urgent need to discover new antimicrobial compounds or extracts to address the crucial problem of increasing microbial resistance against current antibiotics. Similarliy, the whole world is facing water crisis and a possible cost-effective solution is photocatalysis. In this study, an economical and convenient co-precipitation method was adopted to synthesize copper (Cu) loaded graphitic carbon nitride (g-C₃N₄) and magnesium oxide (MgO) composites. Various concentrations (2.5, 5, 7.5, and 10%) of Cu were doped into a fixed amount of g-C₃N₄/MgO nanostructures for efficient photocatalytic and antimicrobial activities. Results showed that 2.5% Cu loaded samples exhibited best possible results for the photocatalytic activity and 10% loaded Cu nanocomposites displayed enhanced antimicrobial performance. Improved crystallinity and increase in crystal size upon doping were confirmed with X-ray differaction (XRD) analysis, which was corroborated with Selected Area Electron Diffraction (SAED) results. Fourier-transform infrared spectroscopy (FTIR) revealed that MgO spectra consisted of stretching vibrations of Mg-O bond and other functional groups with minor changes in the vibrational modes upon doping. An high resolution transmission electron microscope (HRTEM) fitted with Gatan ® digital software indicated hexagonal phase formation in as-prepared samples and nanorods upon doping, with confirmed d-spacing values. The UV–visible spectroscopy (UV–Vis) analysis exhibited a slight redshift in absorption intensity leading to decreased bandgap (Eg) for Cu-loaded g-C₃N₄/MgO. Photoluminescence (PL) spectra were acquired to investigate the recombination of electron–hole pairs. X-ray photoelectron spectroscopy (XPS) was employed to eva

关键词： Antimicrobial Co-precipitation, g-C3N4, nanorods DSC MgO XPS

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Promoting the photocatalytic reduction of CO 2 and dye degradation via multi metallic Sm x modified CuCo 2 O 4 Reverse spinel hybrid catalyst

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Ceramics International 2023年第2期49卷 1742-1755页

作者： Vinayak Adimule Basappa C. Yallur Sheetal Batakurki Chinna Bathula Walid Nabgan Fahad A. Alharthi Byong-Hun Jeon S. Akshatha L. Parashuram Angadi Institute of Technology and Management (AITM) Savagaon Road Belagavi 591108 Karnataka India Department of Chemistry M S Ramaiah Institute of Technology Bangalore 560054 Karnataka India Department of Chemistry. M. S. Ramaiah University of Applied Sciences Bangalore India Division of Electronics and Electrical Engineering Dongguk University–Seoul Seoul 04620 Republic of Korea Departament d’Enginyeria Química Universitat Rovira i Virgili Av Països Catalans 26 43007 Tarragona Spain Department of Chemistry College of Science King Saud University Riyadh 11451 Saudi Arabia Department of Earth Resources and Environmental Engineering Hanyang University 2226 Wangsimni-ro Seongdong-gu Seoul 04763 South Korea Department of Studies and Research in Organic Chemistry Tumkur University Tumkur 572101 India Department of Chemistry Nitte Meenakshi Institute of Technology Yelahanka 560064 Karnataka India

Structuring a multi-functional photocatalyst of which enable high visible light harnessing so as to address the environmental pollution issues is the need of the hour. In view of this, a combination of catalytically active Cu, Co with enhanced adsorption capacity and Sm dopant that can enrich the catalyst with the defect centres would result in a tailor-made photocatalyst. Samarium (Sm) (1–12 wt %) doped CuCo 2 O 4 were synthesized by simple precipitation route. The synergistic influence of Sm, Cu and Co on the photocatalytic ability has been ascertained by optical, structural and morphological methods like XRD, BET, SEM, XPS, Photocurrent, PL, ESR, fluorescence quenching, NMR methods. Thus prepared catalyst was utilized for the photo-catalytic mineralization of methylene blue and reaction was optimized and also it has been proven robust for the photo-reduction of CO 2 into value added products, which are identified by NMR spectral analysis. A comprehensive mechanism has been suggested based on the experimental results. The present research provides the concept of multi-functional photo-catalyst for effluent decontamination and CO 2 reduction.

关键词： Dye degradation CO 2 reduction Photo-reduction Visible light Photocatalysis

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Performance Investigation and Numerical Evaluation of a Single-Effect Double-Lift Absorption Chiller

SSRN

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SSRN 2022年

作者： Saoud, Abdelmajid Bruno, Joan Carles Boukhchana, Yasmina Fellah, Ali University of Gabes National Engineering School School of Gabes Laboratory of Applied Thermodynamic LR18ES33 Gabes6029 Tunisia Universitat Rovira I Virgili Mechanical Engineering Dept. CREVER-Research Group on Applied Thermal Engineering Av. Països Catalans 26 Tarragona43007 Spain University of Gabes Higher Institute of Applied Sciences and Technology of Gabes Laboratory of Applied ThermodynamicLR18ES33 Gabes6029 Tunisia

In this study, a new generation of the absorption refrigeration system (ARS), the Single-Effect Double-Lift absorption chiller (SE-DL AC) is introduced, modeled, and evaluated. Furthermore, the conventional configuration of the Single-effect Absorption Chiller (SE AC) is examined under the same operating conditions to perform a relevant comparison in terms of the internal and external baseline operating conditions.A parametric study has been conducted to figure out the effect of the inlet driving temperature on the overall system performance. This study is carried out in steady-state conditions using the commercial software engineering Equation Solver (EES). The performance of the SE-DL AC was studied under various operating parameters such as (solution mass flow rate, solution heat exchanger effectiveness, and internal and external temperatures). According to this work, in comparison with the SE AC, the SE-DL absorption chiller increases the cooling production by an average of about 10 times for a quite similar COP at an inlet driving temperature of 88.7°C and an inlet hot water mass flowrate of 1 kg/s. Furthermore, the temperature glide of the driving heat source shows also a tenfold increase (36°C instead of 3.5°C). This large glide temperature proves that this chiller is an appropriate solution for utilizing more effectively renewable or waste-driving heat than a conventional SE chiller. © 2022, The Authors. All rights reserved.

关键词： Energy efficiency

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