检索结果-内蒙古大学图书馆

2nd International Conference on Innovative technology and Sciences, iCITES 2020

作者： Tong Kong, Yee Veloo Kutty, Rajaletchumy Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Kuantan Pahang26300 Malaysia Center of Excellence for Advanced Research in Fluid Flow Universiti Malaysia Pahang Kuantan Pahang26300 Malaysia

CAPE found in propolis has become the subject of research interest as it has various medicinal benefits such as antiviral, anti-inflammatory, antioxidant, anticancer and immunomodulatory properties [1]. In this study, propolis obtained in Kuantan, Pahang is encapsulated using biodegradable polymer, vitamin E TPGS as a drug delivery system whereas TPGS-CAPE is used as a control. The findings show the physical characterization of propolis loaded vitamin E TPGS polymeric micelles which includes size, polydispersity index, zeta potential, shape and morphology and encapsulation efficiency. © 2021 Elsevier Ltd. All rights reserved.

关键词： Medical nanotechnology

来源：评论

学校读者我要写书评

暂无评论

Lab-on-a-chip system integrated with nanofiber mats for biochemical simulation of hypoxia of cardiac cells 24

Lab-on-a-chip system integrated with nanofiber mats for bioc...

引用

24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020

作者： Kobuszewska, Anna Kolodziejek, Dominik Wojasiński, Michal Ciach, Tomasz Brzózka, Zbigniew Jastrzębska, Elżbieta Faculty of Chemistry Warsaw University of Technology Poland Faculty of Chemical and Process Engineering Warsaw University of Technology Poland

ISBN: (纸本)9781733419017

The use of polymer nanofibers, whose structure resembles an extracellular matrix, allow for three-dimensional cardiac cell culture. In addition, the integration of nanofiber mats with the microfluidic systems enables the creation of conditions that mimic in vivo conditions. We present a new designed microfluidic system integrated with nanofiber mats for conducting cardiac cell culture and simulating hypoxia. It was proved that the nanofiber mats are appropriate substrate for culturing cardiac cells. It is also possible to create a model of hypoxic myocardial tissue under microfluidic conditions. © 2020 CBMS-0001

关键词： Cell culture

来源：评论

学校读者我要写书评

暂无评论

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

引用

Materials Today: Proceedings 2024年 107卷 36-45页

作者： Siti Amirah Abdul Ghani Mohd-Nasir Nor Shafiqah Sumaiya Zainal Abidin Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob 26300 Kuantan Pahang Malaysia Centre for Research in Advanced Fluid & Processes (FLUID CENTRE) Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob 26300 Kuantan Pahang Malaysia Faculty of Chemical Engineering Industrial University of Ho Chi Minh City 12 Nguyen Van Bao St Go Vap Ho Chi Minh City Vietnam

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.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Downflow sponge biofilm reactors for polluted raw water treatment: Performance optimisation, kinetics, and microbial community

引用

Chemosphere 2024年 358卷 142156页

作者： Loi, Jia Xing Syutsubo, Kazuaki Rabuni, Mohamad Fairus Takemura, Yasuyuki Aoki, Masataka Chua, Adeline Seak May Sustainable Process Engineering Centre Department of Chemical Engineering Faculty of Engineering Universiti Malaya Kuala Lumpur50603 Malaysia Regional Environment Conservation Division National Institute for Environmental Studies Tsukuba305-8506 Japan Research Centre of Water Environment Technology School of Engineering The University of Tokyo Tokyo113-8656 Japan Department of Civil Engineering National Institute of Technology Wakayama College Wakayama Gobo644-0023 Japan

Water outages caused by elevated ammonium (NH4+-N) levels are a prevalent problem faced by conventional raw water treatment plants in developing countries. A treatment solution requires a short hydraulic retention time (HRT) to overcome nitrification rate limitation in oligotrophic conditions. In this study, the performance of polluted raw water treatment using a green downflow sponge biofilm (DSB) technology was evaluated. We operated two DSB reactors, DSB-1 and DSB-2 under different NH4+-N concentration ranges (DSB-1: 3.2–5.0 mg L−1;DSB-2: 1.7–2.6 mg L−1) over 360 days and monitored their performance under short HRT (60 min, 30 min, 20 min, and 15 min). The experimental results revealed vertical segregation of organic removal in the upper reactor depths and nitrification in the lower depths. Under the shortest HRT of 15 min, both DSB reactors achieved stable NH4+-N and chemical oxygen demand removal (≥95%) and produced minimal effluent nitrite (NO2−-N). DSB system could facilitate complete NH4+-N oxidation to nitrate (NO3−-N) without external aeration energy requirement. The 16S rRNA sequencing data revealed that nitrifying bacteria Nitrosomonas and Nitrospira in the reactor were stratified. Putative comammox bacteria with high ammonia affinity was successfully enriched in DSB-2 operating at a lower NH4+-N loading rate, which is advantageous in oligotrophic treatment. This study suggests that a high hydraulic rate DSB system with efficient ammonia removal could incorporate ammonia treatment capability into polluted raw water treatment process and ensure safe water supply in many developing countries. © 2024 Elsevier Ltd

关键词： Ammonia

来源：评论

学校读者我要写书评

暂无评论

A novel metal hydride reactor design: The effect of using copper, AlN and AlSi10Mg composite fins on the dehydrogenation process of LaNi 5 -Metal alloy

引用

International Journal of Hydrogen Energy 2025年 141卷 118-132页

作者： Atef Chibani Chahrazed Boucetta Mohammed Amin Nassim Haddad Ali Boukhari Issam Fourar Slimane Merouani Riad Badji Samir Adjel Sihem Belkhiria Moustafa Boukraa Cherif Bougriou Research Center in Industrial Technologies CRTI P.O.Box 64 Cheraga 16014 Algiers Algeria Faculty of Exact Sciences and Sciences of Nature and Life Department of Material Sciences University of Larbi Ben M'hidi Oum El Bouaghi 04000 Algeria LMSEA Mechanical Engineering Department National Polytechnic School of Constantine Constantine 25000 Algeria UDERZA Unit Faculty of Technology University of El Oued 39000 El Oued Algeria Laboratory of Environmental Process Engineering Department of Chemical Engineering Faculty of Process Engineering University Salah Boubnider Constantine 3 P.O. Box 72 25000 Constantine Algeria University of Monastir Faculty of Sciences Laboratory of Thermal and Energetic Systems Studies LR99ES31 5019 Monastir Tunisia Mechanical Engineering Department Faculty of Technology University of Mostefa Ben Boulaid Batna 2 05000 Batna Algeria

The optimal design of solid-state hydrogen storage devices is crucial for their effectiveness. This study investigates the thermal management of LaNi 5 -based metal hydride reactors for solid-state hydrogen storage by incorporating various fin materials: copper, aluminum nitride (AlN), and Aluminum Silicon Magnesium (AlSi10Mg). Utilizing ANSYS FLUENT 15.0 for simulations within a 2D numerical model, User-Defined Functions (UDFs) were employed to access the dehydrogenation process over a half-hour period. The reactor is subjected to an initial temperature of 363 K and heating oil is introduced at a speed of 1 m/s pressures ranging from 1 to 2 bar. The impact of different fin materials on enhancing the reactor's desorption properties was evaluated through key metrics such as hydrogen concentration, forced convection heat transfer coefficient, and average reactor temperature. Results demonstrate a remarkable improvement in hydrogen desorption rates, where copper fins achieve up to 67.6 % reduction in time to reach equilibrium at 1 bar compared to the reactor without fins. Similarly, AlN and AlSi10Mg fins exhibit a 64 % and 62 % reduction, respectively, highlighting their contributions to improved reactor performance. This research contributes to the advancement of hydrogen storage technologies by offering insights into the selection of fin materials and design for efficient.

关键词： Forced convection

来源：评论

学校读者我要写书评

暂无评论

Integrating flue gas into membrane-based oxygen-enriched gasification of municipal solid wastes for enhancing waste-to-energy conversion

引用

Fuel 2025年 400卷

作者： Chuah, Chong Yang Anwar, Siti Nurhawa Binte Muhammad Weerachanchai, Piyarat Bae, Tae-Hyun Goh, Kunli Wang, Rong Department of Chemical Engineering Faculty of Engineering University of Malaya Kuala Lumpur50603 Malaysia Sustainable Process Engineering Centre Department of Chemical Engineering Faculty of Engineering University of Malaya Kuala Lumpur50603 Malaysia Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Nanyang Technological University Singapore637141 Singapore Residues and Resource Reclamation Centre Nanyang Environment and Water Research Institute Nanyang Technological University Singapore637141 Singapore Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of School of Civil and Environmental Engineering Nanyang Technological University Singapore637459 Singapore

The waste-to-energy (WTE) gasification process converts municipal solid wastes (MSWs) into electrical energy, offering a sustainable solution for solid waste management. Oxygen-enriched gas (OEG) has demonstrated potential to enhance WTE conversion. However, the elevated oxygen content can result in localized overheating, posing damage to the gasifier. The integration of CO2-containing gases, such as through flue gas recirculation (FGR), regulates gasification temperatures and improves operational stability. Despite that, flue gas contains nitrogen, and its impact on OEG gasification efficiency—especially the lower heating value (LHV) of syngas and carbon conversion efficiency (CCE)—remains elusive to date. Hence, this study aims to examine the effects of nitrogen in flue gas and FGR rate on syngas quality and carbon conversion. OEG gasification experiments were conducted using refuse-derived fuel (RDF) as MSW feedstock. As a baseline, membrane-based OEG with 45 % oxygen purity for gasification was employed, owing to the energy- and cost-efficiency of membrane air separation. Flue gas of two different concentrations was then introduced at varying recirculation rates to evaluate its impact on the OEG gasification process. Albeit a dilution effect caused by the non-combustible nitrogen gas, our findings suggest that flue gas with a 35 % CO2 concentration and 10 % recirculation rate is technically viable. Under these conditions, syngas LHV reached 7.74 MJ/m3, while CCE improved by 6 %, as compared to OEG gasification without FGR. These results provide critical insights into the role of flue gas in optimizing OEG gasification for enhanced WTE conversion of MSWs. © 2025 The Author(s)

关键词： Municipal solid waste

来源：评论

学校读者我要写书评

暂无评论

Effect of spent coffee grounds and rice husk amount towards the swelling properties of hydrogel using graft polymerization

引用

Materials Today: Proceedings 2021年 41卷 140-143页

作者： S.S. Jamari S.V. Vennu S. Ghazali S. Abd Rahim Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang 26300 Gambang Pahang Malaysia

Hydrogels are widely known for their ability to absorb water without being dissolved. This characteristic, which is known as swelling has been studied by many researchers in various sectors such as medicine, pharmacy, agriculture, health science and many more. This paper presents a study on the swelling properties of hydrogel that was grafted with spent coffee grounds and rice husk ash. The hydrogel was prepared with acrylic acid as the monomer and acrylamide as the co-monomer. The hydrogel was grafted with spent coffee grounds and rice husk ash separately, with varied weight percent (wt%). The hydrogel was characterized using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Thermal Gravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). The 0.1 (wt%) rice husk ash grafted hydrogel has the best swelling properties as shown by the highest water absorption, with the most porous structure and the highest crystalline temperature (122.0 °C). The FTIR wavenumber showed that the hydrogel is grafted properly as new wavenumbers are formed, whereas the TGA analysis shown that it had the highest decomposition temperature (658.6 °C).

关键词： Hydrogel Swelling Grafted Spent coffee grounds Rice husk ash

来源：评论

学校读者我要写书评

暂无评论

A New Generation of Fully-Printed Electrochemical Sensors Based on Biochar/Ethylcellulose-Modified Carbon Electrodes: Fabrication, Characterization and Practical Applications

SSRN

引用

SSRN 2024年

作者： Gemeiner, Pavol Sarakhman, Olha Hatala, Michal Ház, Aleš Roupcová, Petra Mackuľak, Tomáš Barek, Jiří Švorc, Ľubomír Department of Graphic Arts Technology and Applied Photochemistry Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Radlinského 9 Bratislava812 37 Slovakia Institute of Analytical Chemistry Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Radlinského 9 Bratislava812 37 Slovakia Department of Wood Pulp and Paper Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Radlinského 9 Bratislava812 37 Slovakia Department of Occupational and Process Safety Faculty of Safety Engineering VŠB-Technical University of Ostrava Lumírova 13 Ostrava700 30 Czech Republic Institute of Chemical and Environmental Engineering Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Radlinského 9 Bratislava812 37 Slovakia UNESCO Laboratory of Environmental Electrochemistry Department of Analytical Chemistry Faculty of Science Charles University in Prague Hlavova 2030/8 Prague128 00 Czech Republic

Biochar is a material prepared by biomass pyrolysis, representing a more sustainable and efficient alternative to commonly used conventional carbon materials in electroanalysis. The aim of this paper is to point out that it can also show significant potential in the mass screen-printing production of miniaturized, low-cost, disposable and sensitive electrochemical sensors. Herein, a new generation of fully screen-printed electrochemical sensors is introduced, based on biochar/ethylcellulose-modified carbon working electrodes. The optimization in the sensor fabrication, involving the variability in the concentration of a binder and rheology modifier (ethylcellulose) and its impact on biochar inks from the viewpoint of viscoelasticity, printability and thermal stability, was performed to obtain the carbon-based electrochemical sensors with favourable robustness. The viability of these electrochemical sensors was demonstrated by the development and full validation of a new and sensitive differential pulse voltammetric method for the fast and reliable determination of paracetamol in pharmaceutical formulations. Within the method development, all necessary aspects, such as a study of the effect of ethylcellulose concentration, pH study of supporting electrolyte, mechanism of oxidation reaction of the analyte, selection of pulse parameters and analytical performance, were investigated. The obtained results allow us to predict the production and subsequent use of new, printable, cheap and environmentally friendly sensor platforms, which will exhibit convenient analytical performance with the possibility of commercialization. © 2024, The Authors. All rights reserved.

关键词： Electrochemical sensors

来源：评论

学校读者我要写书评

暂无评论

Potential nanomaterials application in wastewater treatment: Physical, chemical and biological approaches

引用

Materials Today: Proceedings 2021年 42卷 107-114页

作者： Nur Syahirah Kamarudin Rohayu Jusoh Herma Dina Setiabudi Nuramira Fateha Sukor Jun Haslinda Shariffuddin Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang 26300 Gambang Kuantan Pahang Malaysia

The essential challenges in the 21st century are providing clean and affordable water to meet human needs that are mainly resulting from the rapidly increasing population, depleting water resources, and climate change. The development and implementation of advanced wastewater treatment technologies with high efficiency and low capital requirement is important in order to minimize the negative impacts of wastes on the environment. Nanotechnology offers a great potential for removal of pollutants and germs from waswater. High surface-to-volume ratio and photocatalytic properties of these nanomaterials introduced them as highly potent option for removal of heavy metal ions and organic dyes. This paper critically reviewed the application of nanomaterials as nano-adsorbent, nano-catalyst and nano-membrane in wastewater treatment. This review also provided an insight into a detailed description and application of these nanomaterials in chemical, physical and biological treatment for removal of pollutant from waswater. From the current review, it is evident that the nanomaterials possess exclusive properties, which can contribute to the high efficacy in treating high levels of different pollutants.

关键词： Wastewater treatment Nanomaterials Nanosorbent Membrane Nanofiltration Photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Transitioning from platinum: A comprehensive review of alternative cathodic catalysts in direct alcohol fuel cells

引用

process Safety and Environmental Protection 2025年 199卷

作者： Ramli, Zatil Amali Che Pasupuleti, Jagadeesh Osman, Siti Hasanah Zaiman, Nik Farah Hanis Nik Ishak, Nurul Atiqah Izzati Md Ainirazali, Nurul Wan Isahak, Wan Nor Roslam Kiong, Sieh Tiong Koh, S.P. Shaari, Norazuwana Putrajaya Campus Jalan IKRAM-UNITEN Selangor Kajang43000 Malaysia Fuel Cell Institute Universiti Kebangsaan Malaysia Malaysia Faculty of Engineering and Technology Sunway University No. 5 Jalan Universiti Bandar Sunway Selangor Petaling Jaya47500 Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Pahang Kuantan26300 Malaysia Selangor Bangi43650 Malaysia

Fuel cells contribute greatly to the carbon-neutral recycling of carbon dioxide, relying on green hydrogen generated from renewable electrical energy sources. Direct Alcohol Fuel Cells (DAFCs) have developed into a focal point of research interest due to their remarkable energy conversion efficiency, absence of pollutant emissions, and ease of transport, making them an attractive option for sustainable energy production. This comprehensive review critically evaluates the performance of platinum-free cathodic catalysts in DAFCs, focusing on recent advances and challenges. By exploring alternative catalysts such as palladium-based, gold-based, ruthenium-based, Iridium-based, and transition metal-based catalysts, we aim to enhance the cost-effectiveness and accessibility of DAFC technology. The analysis encompasses various factors/parameters influencing cathodic catalyst performance, including synthesis methods, conditions, particle size, crystallinity, and homogeneity. The challenges associated with non-platinum catalysts are discussed, including stability, activity, and cost. Moreover, we highlight the potential of high-performance carbon-based supports such as graphenes, carbon nanofibers (CNFs), carbon nanotubes (CNTs), carbon nitrides, and conductive polymers, along with their surface modifications. Additionally, this review paper summarizes the electrocatalytic efficiency of carbon-based supports containing heteroatom-doped elements (e.g., sulfur, nitrogen, phosphorus, and boron) in DAFCs. We comprehensively overview the latest developments and prospects in non-platinum catalysts and high-performance carbon-based supports for cathodic catalysts in DAFCs. By focusing on these innovations, we seek to contribute significantly to advance sustainable and efficient energy production technologies. © 2025 The Institution of chemical Engineers

关键词： Electrolytic reduction

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：