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Synthesis and characterization of cellulose nanocrystal derived from paper as nanofiller for polymer insulation materials

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Materials Today: Proceedings 2024年 97卷 69-74页

作者： Nurul Shafiqah Amirah Badi Mohamad Zul Hilmey Makmud Chin Se Mun Zuhair Jamain Jahimin Asik Khairatun Najwa Mohd Amin Future Material & Sustainable Energy (FuSE) Research Group Faculty of Science and Natural Resources Universiti Malaysia Sabah 88400 Kota Kinabalu Sabah Malaysia Industrial Chemistry Programme Faculty of Science and Natural Resources Universiti Malaysia Sabah 88400 Kota Kinabalu Sabah Malaysia Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Gambang Kuantan 26300 Pahang Malaysia

The synthesis and characterization of cellulose nanocrystal by utilizing filter paper as the source of material deserves to be an advanced approach. Nanocellulose has received enormous attention due to its unique properties. Being the most abundant organic polymer on earth, nanocellulose is the most suitable candidate for alternative replacement of petroleum-based products. The cellulose was extracted from filter paper by chemical processes involved alkali treatment, bleaching treatment, and acid hydrolysis. Cellulose nanocrystal has been characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Electrical Impedance Spectroscopy (EIS). The dielectric permittivity of the prepared CNC have been investigated in the different temperatures. The nanofiller CNC exhibits a higher real permittivity value at elevated temperatures (60 °C) in the low-frequency region. At high-frequency region, the real permittivity is independent on temperature. In brief, the studies point to the application potential of CNC for future insulation materials.

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Mini-review on fibrous zeolite catalysts for CO2reforming of methane 6

Mini-review on fibrous zeolite catalysts for CO2reforming of...

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6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Miskan, S.N. Abdulkadir, B.A. Abdullah, B. Syed Muhammad, S.A.F. Ismail, S.B. Setiabudi, H.D. Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob Gambang Pahang26300 Malaysia Centre for Research in Advanced Fluid & Processes Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob Gambang Pahang26300 Malaysia Department of Chemical Engineering Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak32610 Malaysia Bioprocess and Polymer Engineering Department Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia UTM Skudai Johor81310 Malaysia Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Kuala Nerus21030 Malaysia

The persistent threat of climate change is brought on by extreme emissions of greenhouse gases (GHGs). Due to its advantages in converting two principal GHGs (CH4and CO2) into a synthesis gas (H2and CO), carbon dioxide reforming of methane has received a lot of interest. However, the main issue with a dry reforming of methane (DRM) that needs to be rapidly tackled is catalyst deactivation caused by sintering and coke formation. In this context, the development of fibrous morphological support materials has emerged as an exciting technique that has shown promise in enhancing the physicochemical characteristics of the catalyst and enabling superior catalytic activity and deactivation resistance during the reaction. The physicochemical characteristics of fibrous zeolite-supported type catalysts, including metal-support interaction, metal dispersion, particle size, surface area, and porous nature, were the main emphasis of this mini-review. Designing suitable catalysts for DRM requires a thorough examination of catalytic properties and their relationship to catalytic performance. © 2022 Elsevier Ltd. All rights reserved.

关键词： Greenhouse gas emissions

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Vertical Take-Off and Landing fixed-wing designed for autonomous missions

Vertical Take-Off and Landing fixed-wing designed for autono...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Krzysztof Lewandowski Jakub Tomczak Jakub Zeifert Szymon Nowacki Marcel Król Dawid Rudy Jacek Grzybowski Paweł Piórkowski Roman Czyba Marcin Lemanowicz Piotr Czekalski Department of Automatic Control Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Department of Chemical Engineering and Process Design Faculty of Chemistry Silesian University of Technology Gliwice Poland

This paper presents the design and development of a Vertical Take-off and Landing (VTOL) fixed-wing aircraft intended for autonomous missions. It provides an overview of the current state of VTOL technology and its applications. The paper focuses on fixed-wing VTOL aircraft created by Academic Scientific Association High Flyers from the Silesian University of technology in Poland. The design process and considerations are discussed in detail, including aerodynamics, selection of materials, hardware, control systems and software. Finally, the paper discusses real-world scenarios that the designed UAV could be used to solve real-world problems, such as targeted plant protection or the deployment of oral vaccines for wildlife. The authors successfully tested solutions presented in the paper during competitions and real practical applications. Overall, this paper provides a comprehensive look into the design and development of a VTOL aircraft for autonomous missions and presents its effectiveness and capabilities in solving real-life problems.

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Overview of the methodology developments in water-energy nexus studies 6

Overview of the methodology developments in water-energy nex...

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6th International Conference on Smart and Sustainable Technologies, SpliTech 2021

作者： Jia, Xuexiu Klemes, Jiri Jaromir Varbanov, Petar Sabev Alwi, Sharifah Rafidah Wan Brno University of Technology Sustainable Process Integration Laboratory - SPIL NETME Centre Faculty of Mechanical Engineering Brno Czech Republic Faculty of Chemical and Energy Engineering Johor Bahru Johor Malaysia

ISBN: (纸本)9789532901122

Water and energy are the most critical resources for human society development and are also the essential sources of significant environmental issues when not properly managed or utilised. Systematic analysis of the two elements facilitates the overall optimisation of water and energy utilisation, rather than decreasing one while increasing another. The concept of the water-energy nexus, namely the interlinkages between water and energy, has been well accepted and utilised in water-energy resource assessment. Various studies have been carried out under this topic and trying to interpret the linkages and use this linkage to assess resource utilisation performance. This review aims to provide a clear vision and possible future directions for implementing and improving water-energy nexus research. The water-energy nexus assessment methods reported in the literature include conceptual framework, statistical analysis, indicator-based approach, and mathematical modelling. Key findings of the review include: 1) The need for more awareness and understanding of the nexus and improve the assessment from quantification to a designing tool. 2) Data availability and quality are still a great challenge for current studies, and data validation is missing in many studies. 3) The water-energy nexus assessment covers mainly the quantity of the flow. In contrast, the quality of the flow is mainly neglected, and 4) the functional unit of water-energy should be further investigated and using monetary units can be a feasible solution. © 2021 University of Split, FESB.

关键词： Water quality

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Effect of Alkaline Pre-treatment on Fermentable Sugar Yield of Ethiopian Bamboo (Yushania Alpine) 8th

Effect of Alkaline Pre-treatment on Fermentable Sugar Yield ...

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8th EAI International Conference on Advancement of Science and technology, ICAST 2020

作者： Alemayehu, Netsanet W/Amanuel, Yalew Gabbiye, Nigus Faculty of Chemical and Food Engineering Process-Engineering Stream Bahir Dar Institute of Technology Bahir Dar University Bahir Dar Ethiopia College of Biological and Chemical Engineering Addis Ababa Science and Technology University Addis Ababa Ethiopia Department of Chemical Engineering Institute of Technology University of Gondar Gondar Ethiopia

ISBN: (纸本)9783030806200

In the recent years, bioethanol derived from lignocellulosic biomass as an alternative to the conventional fuels is becoming a focus of many researchers. In this study, bamboo is used as a feedstock for the production of bioethanol via alkaline pretreatment followed by, enzymatic and acid hydrolysis process. Specifically, the focus is mainly on the investigation of the effect of alkaline pretreatment on the yield of total fermentable sugar from bamboo (yushania alpine) biomass using sodium hydroxide as a catalyst. Alkali concentration, pretreatment temperature, and reaction time were varied in the alkali pretreatment experiments. Following the pretreatment, enzymatic and dilute sulfuric acid hydrolysis of the pretreated bamboo were carried out separately to measure the success of the alkaline pretreatment in improving the total reducing sugar (fermentable sugar) yields. The composition of raw and pretreated bamboo were characterized using NREL and ASTM protocols. The total reducing sugar concentrations after hydrolysis were determined by DNSA method. It was found that, the raw bamboo has a composition of 42.45% cellulose, 23.6% hemicelluloses, and 32.4% Lignin. The alkali pretreatment resulted in a maximum lignin removal of 35.5% at temperature of 60 °C, contact time of 50 min, and alkali concentration of 4.5% w/v, which leads to an increment of cellulose fraction to 64.93% and reduction of lignin to 20.8%. A maximum total reducing sugar yield of 206.3 mg/g and 351.9 mg/g were obtained for pretreated bamboo by using enzymatic and dilute sulfuric acid hydrolysis, respectively. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications engineering.

关键词： Delignification

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Facile synthesis of fibrous Faujasite Y supported Ni (Ni/FFY) catalyst for hydrogen production via glycerol dry reforming

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Materials Today: Proceedings 2024年 107卷 29-35页

作者： N. Abdullah N. Ainirazali H.D. Setiabudi A. Ideris A.R. Mohamed A.A. Jalil Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang 26300 Gambang Malaysia Centre of Excellence for Advanced Research in Fluid Flow (CARIFF) Universiti Malaysia Pahang 26300 Gambang Malaysia School of Chemical Engineering Engineering Campus Universiti Sains Malaysia Seberang Perai Selatan 14300 Nibong Tebal Malaysia School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia (UTM) 81310 Johor Bahru Malaysia Centre of Hydrogen Energy Institute of Future Energy Universiti Teknologi Malaysia (UTM) 81310 Johor Bahru Malaysia

In this study, the dendritic structure of Ni-supported Fibrous Faujasite Y (Ni/FFY) catalyst was successfully synthesized by employing a hydrothermal-assisted microemulsion system and subsequently tested in glycerol dry reforming to produce syngas. FFY possesses high porosity due to the formation of radial wrinkle fibre observed from TEM analysis. This provides a huge amount of interparticle pores that facilitate the absorption of the molecules within the material under a minimum hindrance, hence boosting the interior surface accessibility of Ni/FFY. This exclusive morphology contributed to the enhancement in the amount of accessible Ni active sites, resulting in the good activity of Ni/FFY (C 3 H 8 O 3 conversion = 56.28 %, CO yield = 70.14 %, and H 2 yield = 49.80 %). The extraordinary physicochemical properties of Ni/FFY and outstanding catalytic performance in glycerol dry reforming proved its capability as a sustainable catalyst in transforming waste byproduct (glycerol) and greenhouse gas (CO 2 ) to clean energy (H 2 ). This finding presents a pioneering fibrous zeolite catalyst for hydrogen generation in glycerol reforming.

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Effect of factors on dielectric properties of pineapple leaf for microwave application

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Materials Today: Proceedings 2024年 110卷 127-133页

作者： Azahani Natasha Azman Nurfarhana Mustafa Rudraa Devi Giamasrow Nurhafizah Abu Talip Yusof Norazwina Zainol Mohamad Shaiful Abdul Karim Faculty of Electrical and Electronics Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah 26600 Pekan Pahang Malaysia Centre for Research in Advanced Fluid and Processes (Fluid Centre) Universiti Malaysia Pahang Al-Sultan Abdullah 26300 Kuantan Pahang Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah 26300 Kuantan Pahang Malaysia

Nowadays, dielectric materials are widely used in electronic applications, and their permittivity and loss tangent are important properties to consider. Dielectric materials made from waste can help reduce pollution and conserve resources. The aim of this work is to analyze the important factors in pineapple plantation waste preparation as dielectric materials using rapid two-level factor analysis in order to identify significant factors during preparation. It takes a short procedure to determine the optimum variable factor and leads to fast analysis. The dielectric material preparation process involves chemical treatment, sample fabrication, and sample characterization. Measurement of permittivity is performed by using a G-band rectangular waveguide . The highest dielectric permittivity is 3.31 where one of the suitable applications is used as an antenna substrate . The best factor in producing high dielectric permittivity is a 1:10 ratio of pineapple leaves to distilled water, 50 min of boiling time, using a heating effect, and 5 g weight of pineapple leaves powder. The most significant factor in producing high dielectric permittivity is the heating effect, which is contributed by the presence of carbon in the composite material.

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Performance of Polyamidoamine-Enhanced Inhibitor in Mitigating Silicate Scale from Alkaline Surfactant Polymer (ASP) Flooding

Performance of Polyamidoamine-Enhanced Inhibitor in Mitigati...

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2024 International Petroleum technology Conference, IPTC 2024

作者： Tan, B.C. Saaid, I.M. Mahat, S.Q. Razak, A.A.A. Bhaskoro, P.T. Anuar, A. Ahmed, A.A. Abubakar, A.U. Petroleum Engineering Department Universiti Teknologi PETRONAS Seri Iskandar Perak Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Pahang Kuantan Malaysia PETRONAS Research Sdn Bhd Bandar Baru Bangi Selangor Malaysia PETRONAS Kuala Lumpur City Centre Kuala Lumpur Malaysia John Wood Group plc Scotland Aberdeen United Kingdom Schlumberger Nigeria Limited Lagos Ikoyi Nigeria

ISBN: (纸本)9781959025184

Alkaline surfactant polymer (ASP) flooding is an effective chemical enhanced oil recovery technique to recover more hydrocarbon from maturing oilfields. However, the alkaline slug with high pH would dissolve quartz mineral in the sandstone formation which will result in silicate scaling issue. Silicate scales would precipitate in the formation near the production wellbore region, and further deposit inside production equipment and facilities. Consequently, the productivity of a well will be impeded. Scaling issues can be treated using chemical scale inhibitor (SI) through the application of squeeze treatment, continuous injection, or both. Many commercial SI available are not intended to mitigate silicate scale and these chemicals possess low biodegradability. Hence, more environment-friendly or "green" SI are being developed and tested for their effectiveness on scale inhibition. This paper aims to evaluate the performance of developed green silicate SI in mitigating silicate scale formation. The developed green silicate SI are composed of pteroyl-L-glutamic acid (PteGlu) that has enhanced with polyamidoamine dendrimers, either PAMAM-1.0 or PAMAM-2.0. Several experiments are conducted to assess the SI compatibility with synthetic brines, SI thermal stability, as well as SI effectiveness in treating silicate scale formation in static and dynamic conditions. Static adsorption test is also performed to determine the potential of developed green silicate SI for squeeze treatment. Results revealed that all tested SI are compatible with different synthetic brines. Among all, PAMAM-2.0-PteGlu SI yielded the best laboratory results at its optimum ratio of 1:333. It has the highest thermal stability as it experienced 34% weight loss at temperature 95°C. This SI also achieved 73.1% effectiveness in static scale inhibition test. From dynamic tube blocking experiment, it also managed to delay silicate scale precipitation by 48 times longer than the base case. Besides that, the

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Various advanced wastewater treatment methods to remove microplastics and prevent transmission of SARS-CoV-2 to airborne microplastics

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International Journal of Environmental Science and technology 2023年第2期20卷 2229-2246页

作者： Zahmatkesh, S. Klemeš, J.J. Bokhari, A. Wang, C. Sillanpaa, M. Amesho, K.T.T. Vithanage, M. Department of Chemical Engineering University of Science and Technology of Mazandaran P.O. Box 48518-78195 Behshahr Iran Tecnologico de Monterrey Escuela de Ingenieríay Ciencias Puebla Mexico Sustainable Process Integration Laboratory SPIL NETME Centre Faculty of Mechanical Engineering Brno University of Technology VUT Brno Technická 2896/2 616 00 Brno Czech Republic School of Chemical Engineering Zhengzhou University Zhengzhou450001 China Department of Chemical Engineering College of Engineering King Khalid University Abha61411 Saudi Arabia Research Laboratory of Processes Energetics Environment and Electrical Systems National School of Engineers Gabes University Gabes6072 Tunisia Faculty of Science and Technology School of Applied Physics University Kebangsaan Malaysia Selangor Bangi43600 Malaysia The International University of Management Centre for Environmental Studies Main Campus Dorado Park Ext 1 Windhoek Namibia Center for Emerging Contaminants Research National Sun Yat-Sen University Kaohsiung804 Taiwan Institute of Environmental Engineering National Sun Yat-Sen University Kaohsiung804 Taiwan Faculty of Applied Sciences University of Jayewardenepura Nugegoda Sri Lanka

Microplastics (MPs) and SARS-CoV-2 interact due to their widespread presence in our environment and affect the virus' behaviour indoors and outdoors. Therefore, it is necessary to study the interaction between MPs and SARS-CoV-2. The environmental damage caused by MPs is increasing globally. Emerging pollutants may adversely affect organisms, especially sewage, posing a threat to human health, animal health, and the ecological system. A significant concern with MPs in the air is that they are a vital component of MPs in the other environmental compartments, such as water and soil, which may affect human health through ingesting or inhaling. This work introduces the fundamental knowledge of various methods in advanced water treatment, including membrane bioreactors, advanced oxidation processes, adsorption, etc., are highly effective in removing MPs;they can still serve as an entrance route due to their constantly being discharged into aquatic environments. Following that, an analysis of each process for MPs' removal and mitigation or prevention of SARS-CoV-2 contamination is discussed. Next, an airborne microplastic has been reported in urban areas, raising health concerns since aerosols are considered a possible route of SARS-CoV-2 disease transmission and bind to airborne MP surfaces. The MPs can be removed from wastewater through conventional treatment processes with physical processes such as screening, grit chambers, and pre-sedimentation. © 2022, The Author(s) under exclusive licence to Iranian Society of Environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University.

关键词： Coronavirus

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Synthesis and characterization of stearic acid/waste filler materials as composite phase change material in thermal energy storage application 6

Synthesis and characterization of stearic acid/waste filler ...

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6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Amirah Abdul Ghani, Siti Nor Shafiqah, Mohd-Nasir Zainal Abidin, Sumaiya Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Gambang Kuantan Pahang26300 Malaysia Universiti Malaysia Pahang Gambang Kuantan Pahang26300 Malaysia Faculty of Chemical Engineering Industrial University of Ho Chi Minh City 12 Nguyen Van Bao St Go Vap Ho Chi Minh City Viet Nam

This paper investigates the potential of waste materials, i.e. recycled aluminum cans and carbon biochar (carbon BC) wastes as fillers in stearic acid as PCM supporting matrix material. Using recycled aluminum powder (recycled Al powder) and carbon BC, a new invention of composites phase change material (C-PCM) was established. These C-PCM, which has been was incorporated with different waste fillers, were prepared at different waste mass loading and further characterized using scanning electron microscope (SEM), Fourier infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), pycnometer density analysis, and thermal thermogravimetric analysis (TGA). The result showed that both C-PCM were uniformly dispersed into stearic acid (SA) and portrayed a good contact surface area. The C-PCM with recycled Al powder filler results in higher melting and freezing latent heat than C-PCM with carbon BC filler. Thermal cycle test analysis of selected C-PCM exhibited good thermal stability, reliability, and effective latent heat storage. From the thermal evaluation test, the storage performance of C-PCM was found to perform better compared to lone SA as PCM (SA-PCM). Despite having low latent heat compared to lone PCM, the addition of waste materials into SA has increased C-PCM's thermal stability. Al/SA C-PCM is identified as the most effective TES medium since it gives the best thermal stability and latent heat values. © 2022 Elsevier Ltd. All rights reserved.

关键词： Latent heat

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