检索结果-内蒙古大学图书馆

4th International Conference on Innovative research in Applied Science, engineering and Technology, IRASET 2024

作者： Ou-Khouya, Abdelkarim Mes-Adi, Hassane Taoufiki, Meryem Ibrahim, Imane Ait El Harfouf, Amin Herbazi, Rachid Tahiri, Mohamed Khouribga National School Of Applied Sciences Sultan Moulay Slimane University Process Engineering Computer Science And Mathematics Laboratory Khouribga25000 Morocco Sultan Moulay Slimane University Faculty Of Sciences And Techniques Sustainable Development Laboratory Beni-Mellal Morocco Mohamed V University Laboratory Of Condensed Matter And Interdisciplinary Sciences Cnrst Labeled Research Unit Faculty Of Sciences Departement Of Physics Rabat Morocco University Of Sultan Moulay Slimane Polydisciplinary Faculty Of Khouribga Department Of Physics Khouribga Morocco Tangier Morocco

ISBN: (纸本)9798350309508

In this study, we investigate the mechanical properties of gold (Au) materials using molecular dynamics simulations. In this simulation, the nanoindentation process was performed to analyze the deformation defects and hardness properties of Au under different indentation velocities. The results suggest that the deformation behavior of the Au specimen was affected by different indentation velocities. These findings were confirmed by examining the load-displacement curve, which indicated elastic deformation through the appearance of a linear load-displacement relationship at low indentation velocities. In contrast, plastic deformation was identified by the presence of intensified serrations in the load-displacement curve at higher indentation velocities. Under such conditions, the hardness exhibited minimal variation when the indenter velocity increased from 5 mls to 10 mls. However, a significant increase in hardness was noted when the indentation velocity was further raised to 15 mls. © 2024 IEEE.

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

A short review: Chemo-catalytic CO₂ insertion in amine and amino alcohols to produce linear and cyclic carbamates

Tetrahedron Green Chem

引用

Tetrahedron Green Chem 2023年 2卷

作者： Kondawar, Sharda Patil, Chetana Raylu, Sadhana Rode, Chandrashekhar Environmental Material Division CSIR-National Environmental Engineering Research Institute Nehru Marg Nagpur 440 020 India Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India

The adverse effect of carbon dioxide occurred in past decade on environment, led researchers to use CO2 as a C1 building block for the synthesis of various commodity chemicals. Most of the drug molecules and polymers ...

The adverse effect of carbon dioxide occurred in past decade on environment, led researchers to use CO₂ as a C1 building block for the synthesis of various commodity chemicals. Most of the drug molecules and polymers have back bone of carbon chain which provides great opportunity to researchers, to make use of CO₂ as an abundant and renewable source of carbon. Chemo-catalytic synthesis of industrially important cyclic and open chain carbamate using amino alcohol/alcohol and amine in presence of CO₂ as carbonylating agent has got much more attention in recent years. This review focuses on the literature survey from 1986 to 2022 on carbamate synthesis and provides clear idea about prerequisite active sites in catalyst for the activation of CO₂ which is a major challenge. The details of mechanism proposed for the chemo-catalytic pathway has been discussed in detail in order to understand and design the novel and efficient catalyst system in near future in this demanding research field. © 2023

关键词：

来源：评论

学校读者我要写书评

暂无评论

Evaluation of OxiOrganosolv pretreated hardwood and softwood lignocelluloses as substrates for the chemoenzymatic production of 5-hydroxymethylfurfural (HMF)

引用

Biotechnology for the Environment 2024年第1期1卷 1-13页

作者： Grigorios Dedes Anthi Karnaouri Evangelos Topakas Asimina A. Marianou Angelos A. Lappas Yu Zhang Industrial Biotechnology & Biocatalysis Group School of Chemical Engineering National Technical University of Athens Athens 15780 Greece Department of Crop Science Laboratory of General and Agricultural Microbiology Agricultural University of Athens Athens 11855 Greece Chemical Process and Energy Resources Institute Center for Research and Technology Hellas Thessaloniki 57001 Greece Guangzhou Institute of Energy Conversion Chinese Academy of Sciences CAS Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China

Furans, such as 5-hydroxymethylfurfural (HMF), are compounds of great importance that can serve as starting materials for the synthesis of polymers. Their production from lignocellulose-derived sugar streams offers a promising alternative to fossil fuels, while enabling biomass transformation to chemicals with higher value. In the present work, the production of HMF from OxiOrganosolv pretreated beechwood and pine was assessed by integrating a three-step process of enzymatic saccharification and isomerization followed by catalytic dehydration. The use of isobutanol in the pretreatment solvent and the addition of polyoxometallates (POMs) as oxidative catalysts were evaluated. The results showed that isobutanol leads to high delignification rates for both beechwood and pine, yielding cellulose-rich pulps with high susceptibility to enzymatic hydrolysis and isomerization. A fructose production up to 51.2 and 53.4 g/g of pretreated material was achieved for beechwood and pine, respectively, corresponding to 14 and 11.3 g of HMF/g of pretreated material. Regarding the use of POMs, the commercially available phosphomolybdic acid (HPMO) and POMs modified with oxidation metals (Fe-PMO, Cu-PMO) were tested, verifying their beneficial effect to lignin depolymerization and the composition of the final pulp. Hydrolysates produced from HPMo and Cu-PMo-assisted OxiOrganosolv pretreatment were efficiently used for the production of HMF, while severe inhibition of the dehydration reaction was observed with the hydrolysates from Fe-PMo pretreated biomass due to the presence of residual metals. This is the first systematic report comparing two lignocellulosic materials subjected to different pretreatment conditions for their potential to produce fructose and, subsequently, HMF.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Foam control in biotechnological processes—challenges and opportunities

引用

Discover chemical engineering 2024年第1期4卷 1-32页

作者： Tiso, Till Demling, Philipp Karmainski, Tobias Oraby, Amira Eiken, Jens Liu, Luo Bongartz, Patrick Wessling, Matthias Desmond, Peter Schmitz, Simone Weiser, Sophie Emde, Frank Czech, Hannah Merz, Juliane Zibek, Susanne Blank, Lars M. Regestein, Lars Institute of Applied Microbiology–iAMB Aachen Biology and Biotechnology–ABBt RWTH Aachen University Aachen Germany Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany Institute of Interfacial Process Engineering and Plasma Technology IGVP University of Stuttgart Stuttgart Germany Fredensborg Denmark College of Life Sciences and Technology Beijing University of Chemical Technology Beijing China Chemical Process Engineering AVT RWTH Aachen University Aachen Germany DWI Leibniz-Institute for Interactive Materials Aachen Germany Institute of Environmental Engineering RWTH Aachen University Aachen Germany Division of Sustainable Development College of Science and Engineering Hamad Bin Khalifa University (HBKU) Doha Qatar Bio Pilot Plant Leibniz Institute for Natural Product Research and Infection Biology–Hans Knöll Institute (Leibniz-HKI) Jena Germany Heinrich Frings GmbH & Co. KG Rheinbach Germany Evonik Operations GmbH Research Development & Innovation Biotech Hub Hanau Germany

Foam formation is a massive challenge in submerged aerated bioprocesses, e.g., in beer fermentation. While the use of antifoam may easily overcome foaming at laboratory scale, it is often an unattractive solution since the challenge remains in future upscaling, as reduced mass transfer and extra steps in product purification and analytics result in increased costs. Interestingly, the number of studies tackling this challenge is relatively low, although literature suggests a range of alternatives, from avoiding foaming to means of controlling or even using foaming as an in situ product removal. Here we give an overview of the topic in five subsections. (1) We argue that a sound understanding of the molecular origin of foaming can facilitate solutions for overcoming the challenge while introducing some long-known challenges (i.e., in beer fermentation). We then review in (2) the apparent avoidance of foam formation before we in (3) summarize possibilities to reduce and control foam after its formation. Subsequently, in (4), we discuss possible solutions that take advantage of foam formation, for example, via foam fractionation for in situ product removal. Finally, in (5), we provide an overview of microbial strain engineering approaches to cope with some aspects of foaming in fermentations. With this review, we would like to sensitize and inform the interested reader while offering an overview of the current literature for the expert, particularly with regard to the foam special issue in Discover chemical engineering.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Application of Rotating Cone Reactor for Continuous Biodiesel Production: Effect of Cone Geometry and Optimization of Operating Variables Through Response Surface Methodology (Rsm)

SSRN

引用

SSRN 2024年

作者： Mens, Weerinda Jantasee, Sasiradee Mueansichai, Thirawat Kositanont, Chayanoot Ngaosuwan, Kanokwan Wongsawaeng, Doonyapong Jitpinit, Sarawut Siraworakun, Chaiyapop Hiranlordsanti, Paweemas Assabumrungrat, Suttichai Department of Chemical and Materials Engineering Faculty of Engineering Rajamangala University of Technology Thanyaburi Pathum Thani12110 Thailand Pathum Thani12120 Thailand Chemical Engineering Division Faculty of Engineering Rajamangala University of Technology Krungthep Bangkok10120 Thailand Research Unit on Plasma Technology for High-Performance Materials Development Department of Nuclear Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Center of Excellence in Catalysis and Catalytic Reaction Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand

The work developed a rotating cone reactor (RCR) as a promising multifunctional reactor for continuous biodiesel production from refined palm oil (RPO) homogeneously catalyzed by NaOH. The effects of rotating cone geometry, rotational speed, catalyst amount, and reactant feed flow rate on FAME yield were investigated. Response surface methodology (RSM) and the Design Expert software were used to optimize the operating variables. The grooved cone surface was found to play an important role in increasing FAME yield. The model predicted a maximum FAME yield of 96.9% at the process conditions of NaOH loading of 0.602 wt.% of oil, a feed flow rate of 298 mL/min, and a rotational speed of 751 rpm. It provided a high yield efficiency of 1.324×10−3 g/J at a very short residence time of 2 – 3 s. This resulted in a significant reduction in transesterification time, suggesting that the RCR is a promising multifunctional reactor for economical continuous biodiesel production. © 2024, The Authors. All rights reserved.

关键词： Biodiesel

来源：评论

学校读者我要写书评

暂无评论

Fabrication of a Novel S-Scheme Bioac1-Xbrx/Biobr Photocathode with Ov for Tc Degradation and Electricity Generation in the Z-S-Scheme Photocatalytic Fuel Cell

SSRN

引用

SSRN 2023年

作者： Yu, Tingting Yang, Bing Zhang, Rong Yang, Chenyu Arramel Jiang, Jizhou School of Environmental and Chemical Engineering Jiangsu Ocean University Lianyungang222005 China School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization Ministry of Education Novel Catalytic Materials of Hubei Engineering Research Center Wuhan Institute of Technology Wuhan430205 China Nano Center Indonesia Jalan Raya PUSPIPTEK Banten South Tangerang15314 Indonesia

In comparison with traditional oxidation technology, the photocatalytic fuel cell system (PFC) is an efficient and clean wastewater treatment technology. The construction of heterojunction is an effective method to improve the efficiency of photogenerated electron and hole separation. Therefore, in this work, a S-scheme BiOAc1-xBrx/BiOBr wtih oxygen vacancy (OV) was used as the photocathode and the Z-scheme TiO2/GO/g-C3N4 as the photoanode to achieve simultaneous degradation of tetracycline hydrochloride (TC) in the two chambers. When the molar ratio of Br/Bi is about 0.8 (x=0.8), pH=2 and concentration is 60 mg·L−1, the photocathode degradation rate of TC reaches 96.33% (120 min), which is 5.29 times and 3.76 times that of pure BiOBr and pure BiOAc. The addition of a small amount of persulfate has an obvious effect on improving conductivity. The current density is increased to 4.17 uW·cm−2 and the voltage is 38.20 mV, which is 1.5 times than the original. The results showed that the ·OH, ·O2- were produced during degradation and the electron generation, transport and pollutant degradation mechanism in the PFC were proposed. The intermediate substances of TC degradation were analyzed by HPLC-MS and UPS, and the optimal degradation path was calculated by density functional theory (DFT). Therefore, this work was feasible to achieve efficient degradation of wastewater pollutants and the generation of hydrogen and electricity. © 2023, The Authors. All rights reserved.

关键词： Bromine compounds

来源：评论

学校读者我要写书评

暂无评论

Electrode-Attached Cell-Driven Biogas Upgrading of Anaerobic Digestion Effluent Co2 to Ch4 Using a Microbial Electrosynthesis Cell

SSRN

引用

SSRN 2022年

作者： Kim, Minsoo Li, Shuwei Lee, Dong-Yeol Kim, Jung Rae Song, Young Eun School of Chemical Engineering Pusan National University Busan46241 Korea Republic of Advanced Biofuel and Bioproducts Process Development Unit Lawrence Berkeley National Laboratory EmeryvilleCA94608 United States

Upgrading biogas from anaerobic digestion (AD) has been highlighted as a means of securing an alternative renewable energy source to replace the geopolitically limited natural gas. The CO2 content of AD effluent is more than 40%, making it necessary to separate or increase the CH4 content to 95%. This study examines microbial electrosynthesis (MES) to convert CO2 directly to CH4 by a cathode electrode-attached cell. The MES with −1.0V (versus Ag/AgCl) applied cathodic potential exhibited a maximum methane production rate of 10.55L CH4/ m2 cat/ day and achieved a 96% final CH4 content. Applying real biogas from a field AD plant resulted in a comparable production rate of 8.8L CH4/ m2 cat/ day with 95% CH4. The scaled-up bench MES reactor (total volume of 6L) was evaluated, and the energy efficiencies of laboratory- and bench-scale MES were compared. The next-generation sequencing (NGS) revealed most methanogens (e.g., Methanobacterium, Methanothrix, and Methanobrevibacter) to be associated with the cathode surface rather than suspension. Cyclic voltammetry and field emission scanning electron microscopy showed that the electrode-associated cell predominantly controls the performance of the MES system. These results suggest that electrode-attached cells play a major role in the biogas upgrading of CO2 to CH4 in the MES system. © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Enhancing performance of polymer-based microchannel heat exchanger with nanofluid: A computational fluid dynamics-artificial neural network approach

引用

South African Journal of chemical engineering 2023年 46卷 361-375页

作者： Kamsuwan, Chaiyanan Wang, Xiaolin Seng, Lee Poh Xian, Cheng Kai Piemjaiswang, Ratchanon Piumsomboon, Pornpote Manatura, Kanit Kaewbumrung, Mongkol Pratumwal, Yotsakorn Otarawanna, Somboon Chalermsinsuwan, Benjapon Fuels Research Center Department of Chemical Technology Faculty of Science Chulalongkorn University Bangkok 10330 Thailand School of Engineering The Australian National University Canberra 2601 ACT Australia Department of Mechanical Engineering Faculty of Engineering National University of Singapore 9 Engineering Drive 1 117576 Singapore Environmental Research Institute Chulalongkorn University Bangkok 10330 Thailand Center of Excellence on Petrochemical and Materials Technology Chulalongkorn University Bangkok 10330 Thailand Department of Mechanical Engineering Faculty of Engineering at Kamphaeng Saen Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand Department of Mechanical Engineering Faculty of Engineering and Architecture Rajamangala University of Technology Suvarnabhumi (Huntra Campus) Phranakhon Si Ayutthaya 13000 Thailand National Metal and Materials Technology Center National Science and Technology Development Agency Pathum Thani 12120 Thailand Advanced Computational Fluid Dynamics Research Unit Chulalongkorn University Bangkok 10330 Thailand

Polymer-based heat exchangers can offer a promising solution for environmental sustainability due to their low energy consumption. The incorporation of microchannels and nanofluids further enhances the heat transfer performance of these heat exchangersIn this study, a polymer-based microchannel heat exchanger combined with nanofluid is simulated through the integration of an artificial neural network predictive model and a three-dimensional computational fluid dynamics model. This study unveils an advanced calculation that integrates artificial intelligence and readily-available computational software provided as the advanced calculation system. A statistical mathematics response surface method which data is used for correlating the calculation model is applied to obtain the design parameters between operating conditions and for optimal performance. The optimized results reveal that polymer-based microchannel heat exchanger combined with nanofluid is a promising innovation. The heat transfer improvement achieved a 12 % increase in the overall heat transfer coefficient by using TiO₂/Water compared to Water. Moreover, a 1.03 performance index is obtained when CuO/Water nanofluid is used, a 66 horizontal parallel connecting of the polymer-based microchannel heat exchanger shows that the equipment can afford the same heat transfer performance of the metal-based microchannel heat exchanger in TiO₂/Water nanofluid usage and implying a balance between heat transfer enhancement and energy consumption. © 2023 The Author(s)

关键词： Artificial neural network Computational fluid dynamics Heat exchanger Nanofluid Performance optimization Polymer-based microchannel

来源：评论

学校读者我要写书评

暂无评论

Enhancing exergy efficiency and environmental sustainability in pressure swing azeotropic distillation

引用

Cleaner Energy Systems 2024年 9卷

作者： Wavomba Mtogo, Jonathan Wanyaga Mugo, Gladys Mizsey, Peter Department of Chemical and Environmental Process Engineering Budapest University of Technology and Economics Budapest 1111 Hungary Chemical Engineering Division Kenya Industrial Research and Development Institute P.O. Box 30650 Nairobi 00100 Kenya Advanced Materials and Intelligent Technologies Higher Education and Industrial Cooperation Centre University of Miskolc Egyetemváros Miskolc H-3515 Hungary

This study explores the economic, energetic, exergy efficiency, and environmental benefits of energy integration in pressure-swing distillation, focusing on the separation of tetrahydrofuran/water and acetone/chloroform azeotropes. Heat integration and heat pump techniques are applied to reduce energy consumption. Three energy-efficient configurations are examined, comparing total annual cost (TAC), total energy consumption (TEC), CO₂ emissions, and second-law efficiency. In the tetrahydrofuran/water system, heat integration and heat pump technologies outperform conventional processes, achieving up to 50.2% TAC reduction, 59.6% TEC reduction, 82.8% CO₂ emission reduction, and thermodynamic efficiencies up to 23.5%. In the acetone/chloroform system, similar improvements are observed, with up to 70.9% TAC reduction, 87.2% CO₂ emission reduction, and thermodynamic efficiencies up to 17.6%. These findings demonstrate the effectiveness of energy-saving strategies, endorsing process intensification for environmentally sustainable azeotropic mixture separations. © 2024 The Author(s)

关键词： Azeotrope CO2 emissions Exergy analysis Pressure-swing distillation

来源：评论

学校读者我要写书评

暂无评论

Editorial: Proceedings of ABBS-international conference on biohydrogen and bioprocesses 2022 (ABBS 2022)

引用

Frontiers in Bioengineering and Biotechnology 2024年 12卷 1390377页

作者： Xia, Ao Herrmann, Christiane Reungsang, Alissara Show, Pau-Loke Trably, Eric Wu, Junjun Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing University Ministry of Education Chongqing China Institute of Engineering Thermophysics School of Energy and Power Engineering Chongqing University Chongqing China Potsdam Germany Research Group for Development of Microbial Hydrogen Production Process from Biomass Department of Biotechnology Faculty of Technology Khon Kaen University Khon Kaen Thailand Department of Chemical Engineering Khalifa University Abu Dhabi United Arab Emirates Department of Chemical and Environment Engineering Faculty of Science and Engineering University of Nottingham Malaysia Semenyih Malaysia INRAE Université de Montpellier LBE Narbonne France

A massive amount of solid wastes (such as straws, manures, plastic and food wastes), liquid wastes (such as municipal and agricultural wastewaters), and gaseous wastes (such as flue gases rich in carbon dioxide) are generated from industrial, residential, transportation and agricultural sectors (Siegelman et al., 2021;Vyas et al., 2022;You et al., 2022). These wastes would cause significant adverse environmental impacts if they are not properly treated. Turning wastes into biofuels and bioproducts can make a substantial contribution to the clean energy supply and environmental protection (Bhatia et al., 2018;Peng et al., 2023;Wang et al., 2023). However, competitive and sustainable circular economy solutions via scientific and technological innovation are urgently needed to improve the conversion rates and efficiencies of such *** research topic includes four original research papers, which could provide various solutions to upgrade the solid, liquid, and gaseous wastes to value-added *** digestion is a mature technology and has been developed for over a hundred years. However, anaerobic mono-digestion suffers from drawbacks such as low biogas/biomethane yield, digester instability and limited year-round availability of specific feedstocks (Karki et al., 2021). A study by Kriswantoro et al. investigated the performance of anaerobic co-digestion of untreated Napier grass and food waste hydrolyzed with subcritical water. An optimal biomethane yield of 614.37 mL/g VS was obtained at a 1:1 ratio (VS basis) of Napier grass and food waste during two-stage anaerobic digestion that sequentially produced biohydrogen and biomethane. The methane concentration in the biogas was higher than 65% on day 20 and maintained in the range of 65%-80% until the end of anaerobic digestion. Liquid digestate derived from anaerobic digestion contains high levels of nitrogen and phosphorus pollutants, which may require an energy-intensive and high-cost post-treatment

关键词： biofuels waste treatment fermentation mass transfer circular economy

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：