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Experimental evaluation and modeling of liquid jet penetration to estimate droplet size in a three-phase riser reactor

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Chinese Journal of Chemical engineering 2016年第2期24卷 293-309页

作者： Ali Akbar Jamali Shahrokh Shahhosseini Yaghoub Behjat School of Chemical Engineering Iran University of Science and Technology (IUST) Process Development and Equipment Technology Division Research Institute of Petroleum Industry

In this work, the effects of injecting an evaporating liquid jet into solid-gas flow are experimentally investigated. A new model （SHED model） and a supplementary model （spray model） have also been proposed to investigate some flow-field characteristics in three-phase fluidized bed with the mean relative error 4.3% between model and measured results. Some experiments were conducted to study the influences of flow-field parameters such as liquid volumetric flow rate, injection velocity, jet angle and gas superficial velocity as well as solid mass flux on the jet penetration depth （JPD）. In addition, independent variables were experimentally employed to propose two empirical correlations for JPD by using multiple regression method and spray cone angle （SCA） by using dimensional analysis technique. The mean relative errors between the JPD and SCA correlations versus ex- perimental data were 7.5% and 3.9%, respectively. In addition, in order to identify the variable effect, a parametric study was carried out. Applying the proposed model can avoid direct use of expensive devices to measureJPD and to nredict dronlet size.

关键词： FC-C riser reactor Hydrod ynamics Heterogeneous vaporization Jet penetration depth （JPD） Spray cone angle （SCA）

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Optimization of ionic liquid-based microwave extraction of flavonoid and phenolic acid from Labisia Pumila

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AIP Conference Proceedings 2019年第1期2124卷

作者： Nur Rahilah Haji Abd Rahman Ani Idris Nor Alafiza Yunus Azizul Azri Mustaffa 1School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor MALAYSIA 2Process Systems Engineering Centre (PROSPECT) Research Institute for Sustainable Environment (RISE) Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor MALAYSIA 3Institute of Bioproduct Development Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor MALAYSIA

Ionic liquids have attracted many researches in bioactive compound separation as well as carbon capture. This is due to the ability of ionic liquid to be designed based on specific needs and produced higher quantity and quality of extract product. A study showed that ionic liquid can extract a higher number of phytochemicals compared to conventional solvents and produce better yield with microwave-assisted extraction. Due to vast possible structures of ionic liquid and wide range of phytochemicals existed, a systematic approach was developed to screen ionic liquid solvents for phytochemical extraction. This study is a part of experimental validation included in the systematic approach. The main focus of this study is to optimize the process of ionic liquid-based microwave-assisted extraction of flavonoid and phenolic acid from Labisia pumila. A two-level, four-factor of central composite design (CCD) was employed to determine the effect of the process factors towards yield of flavonoid and phenolic acid extracted from the herb. The process factors are the temperature (Celsius), extraction time (min), power (W) and type of ionic liquid (based on their dielectric point). In this study, ionic liquid was back-extracted using organic solvents for regeneration and recycle of extraction solvent, based on Bogdanov (2015). The extracted samples were analyzed by determining the yield of flavonoid and phenolic acid through linear equation of quercetin and gallic acid. In this study, it can be observed that the recovery of flavonoid and phenolic acid from L. pumila using ionic liquid-based microwave-assisted extraction was about 30 – 50 percent higher compared to conventional solvent. Therefore, the study indicated that ionic liquid-based microwave-assisted extraction was an efficient and rapid method for L. pumila phytochemical extraction.

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Corrigendum to "Priorities to inform research on marine plastic pollution in Southeast Asia" [Sci. Total Environ. volume 841 (2022) Article 156704]

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The Science of the total environment 2023年第PT 3期857卷 159595页

作者： Lucy C M Omeyer Emily M Duncan Kornrawee Aiemsomboon Nicola Beaumont Sujaree Bureekul Bin Cao Luis R Carrasco Suchana Chavanich James R Clark Muhammad R Cordova Fay Couceiro Simon M Cragg Neil Dickson Pierre Failler Gianluca Ferraro Stephen Fletcher Jenny Fong Alex T Ford Tony Gutierrez Fauziah Shahul Hamid Jan G Hiddink Pham T Hoa Sophie I Holland Lowenna Jones Nia H Jones Heather Koldewey Federico M Lauro Charlotte Lee Matt Lewis Danny Marks Sabine Matallana-Surget Claudia G Mayorga-Adame John McGeehan Lauren F Messer Laura Michie Michelle A Miller Zeeda F Mohamad Nur Hazimah Mohamed Nor Moritz Müller Simon P Neill Sarah E Nelms Deo Florence L Onda Joyce J L Ong Agamuthu Pariatamby Sui C Phang Richard Quilliam Peter E Robins Maria Salta Aida Sartimbul Shiori Shakuto Martin W Skov Evelyn B Taboada Peter A Todd Tai Chong Toh Suresh Valiyaveettil Voranop Viyakarn Passorn Wonnapinij Louisa E Wood Clara L X Yong Brendan J Godley Centre for Ecology and Conservation University of Exeter Penryn Campus Penryn Cornwall TR10 9EZ United Kingdom. Electronic address: L.C.M.Omeyer@exeter.ac.uk. Centre for Ecology and Conservation University of Exeter Penryn Campus Penryn Cornwall TR10 9EZ United Kingdom OKEANOS Universidade dos Açores Departamento de Oceanografia e Pescas 9901-862 Horta Portugal. Electronic address: emily.m.duncan@uac.pt. Department of Marine Science Faculty of Science Chulalongkorn University Bangkok 10330 Thailand. Plymouth Marine Laboratory Prospect Place The Hoe Plymouth Devon PL1 3DH United Kingdom. Singapore Centre for Environmental Life Sciences Engineering Nanyang Technological University 637551 Singapore School of Civil and Environmental Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore. Department of Biological Sciences National University of Singapore 14 Science Drive 4 117543 Singapore. Department of Marine Science Faculty of Science Chulalongkorn University Bangkok 10330 Thailand Aquatic Resources Research Institute Chulalongkorn University Bangkok 10330 Thailand. Research Centre for Oceanography Indonesian Institute of Sciences (LIPI) Jalan Pasir Putih 1 Ancol Timur Jakarta 14430 Indonesia Research Centre for Oceanography National Research and Innovation Agency (BRIN) Jalan Pasir Putih 1 Ancol Timur Jakarta 14430 Indonesia. School of Civil Engineering and Surveying Faculty of Technology University of Portsmouth Portsmouth Hampshire PO1 3AH United Kingdom. Institute of Marine Sciences University of Portsmouth Portsmouth Hampshire PO4 9LY United Kingdom Centre for Enzyme Innovation School of Biological Sciences University of Portsmouth Portsmouth Hampshire PO1 2DY United Kingdom. School of Ocean Sciences Bangor University Menai Bridge Anglesey LL59 5AB United Kingdom. Centre for Blue Governance Department of Economics and Finance University of Portsmouth Portsmouth Hampshire PO1 3DE United Kingdom. School of the E

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Effects of the support material addition on the hydrodynamic behavior of an anaerobic expanded granular sludge bed reactor

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Journal of Environmental Sciences 2017年第4期29卷 224-230页

作者： Tania Pérez-Pérez Gleyce Teixeira Correia Wu Hong Kwong Ileana Pereda-Reyes Deny Oliva-Merencio Marcelo Zaiat Institute of Animal Science San Jose de las Lajas Mayabeque Cuba Department of Chemical Engineering Federal University of Sao Carlos Brazil Process Engineering Centre Instituto Superior Politecnico Jose Antonio Echeverria (Cujae) 11901 114 Street Marianao Havana Cuba Study Centre of Renevaable Energy Technologies Instituto Superior Politecnico rose Antonio Echeverria (Cujae) 11901 114 Street Marianao Havana Cuba Biological Processes Laboratory Center for Research Development and Innovation in Environmental Engineering Sao Carlos School of Engineering University of Sao Paulo Engenharia Ambiental - Bloco 4-F Av. Joao Dagnone 17.00 - Santa Angelina 13.563-120 Sao Carlos SP Brazil

As a support material, zeolite can be used to promote the granulation process due to its high settable property and the ability to retain biomass on its surface. The present paper reports on the influence of zeolite addition on the hydrodynamic behavior of an expanded granular sludge bed reactor（EGSB）. Different models were applied to fit the flow pattern and to compare EGSB hydrodynamic performance with and without the addition of zeolite. The experimental data fit the tanks in a series model for zeolite bed height of 5 cm and upflow velocity of 6 m/*** axial dispersion degree（D/uL） was obtained at lower heights of zeolite. The real hydraulic retention time（HRTr） was increased with both increased zeolite bed height and increased upflow velocity. The short-circuit results for 5 cm of zeolite bed and 6, 8 and 10 m/hr upflow velocity were 0.3, 0.24 and 0.19 respectively, demonstrating the feasibility of using zeolite for a proper hydrodynamic environment to operate the EGSB reactor. The presence of zeolite resulted in the higher percentage values of dead zones, ranging from 12% to 24%.Zeolite addition exerted a positive effect on the hydrodynamics pattern for this technology being advantageous for the anaerobic process because of its possible contribution to better biofilm agglomeration, granule formation and substrate-microorganism contact.

关键词： Anaerobic digestion Axial dispersion degree EGSB reactor Hydrodynamics Upflow velocity Zeolite

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A comparative analysis of destructive forces resulting from road profile acting on off-road towed vehicles 19

A comparative analysis of destructive forces resulting from ...

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19th International and 14th European-African Regional Conference of the International Society for Terrain-Vehicle, ISTVS 2017

作者： Gurmai, László Kiss, Péter CLAAS Hungaria Kft Research and Development Kombájn utca 1 TörökszentmiklósH-5200 Hungary Department of Automotive Technology Institute of Process Engineering Faculty of Mechanical Engineering Szent István University Páter K. u. 1. GödölloH-2103 Hungary

ISBN: (纸本)9781942112495

The more extreme conditions the vehicle is exposed to, the sooner it wears out and deteriorates. In order to determine the forces affecting the lifespan of vehicles we need to know the environmental conditions eliciting these forces. This research aims at elaborating and testing a method which can help to conduct a comparative analysis of forces acting on towed vehicles used in different terrain conditions. Excitation forces acting on a vehicle being towed across terrain cause vibrations which lead to wear and structural deterioration. The rate of deterioration depends on the activating forces resulting from the road profile geometry and the dynamic properties of the vehicle. A knowledge of the relationship between the towed vehicle and the terrain profile will enable the design of an artificial road profile for fatigue testing with which similar stresses arise as during normal use.

关键词： Landforms

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Security Management at the National institute of Management: To Outsource or Insource? Cases (A) and (B)

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Vikalpa 2019年第2期44卷 88 - 94页

作者： Narasimhan Ravichandran Sundaravalli Narayanaswami has been a faculty member in the Production and Quantitative Methods Area of the Indian Institute of Management Ahmedabad (IIMA) since 1980. He has also served as the director of The Indian Institute of Management Indore. He is an MSc in Maths from Annamalai University and holds a PhD from Indian Institute of Technology Madras. His teaching and research interests include applied probability business process re-engineering competitive strategy decision analysis entrepreneurship industry analysis and corporate strategy information technology for competitive advantage logistics and supply chain management operations management operations strategy quantitative methods in management and simulation. He has held several short-term visiting positions in many European Universities. He has edited and co-authored many books published in several in peer-reviewed journals. e-mail: is a faculty member of the Public Systems Group at Indian Institute of Management Ahmedabad (IIMA). She has a PhD in industrial engineering and operations research from IIT Bombay. Her teaching interests are in intelligent transportation systems operations research in public systems operations management urban transportation in addition to management information systems and knowledge management. Most of her research in the past and present are in transportation operations and knowledge management that involve applications of ICT and OR tools in real-life problems of large impact. Dr Sundaravalli started her career in IT services marketing and she soon moved to a production profile in an electronics equipment manufacturing industry. Her academic career began later and she has taught at various programs in Mumbai University and at institutes under the UAE Federal education ministry in Abu Dhabi and Dubai. She has also taught in many executive development programs while at UAE. She publishes and reviews regularly for scholarly editorials. e-mail:

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Receiving nanostructural topocomposite coatings in terms of the cascade cross effect

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Journal of Physics: Conference Series 2019年第1期1210卷

作者： P B Grinberg K N Poleschenko D N Korotaev P V Orlov G A Vershinin E E Tarasov E V Ivanova Omsk Scientific Research Institute of Process and Engine Manufacture 283 street of B. Khmelnytskyi Omsk 644021 Russia Siberian State Automobile and Highway University 5 Mira ave. Omsk 644080 Russia Dostoevsky Omsk State University 55a Mira ave. Omsk 644077 Russia FGUP Federal Research and Development Centre «Progress» 4 5th Kordnaya street Omsk 644018 Russia Omsk Tank-Automotive Engineering Institute 119 14th military town Omsk 644098 Russia

The article considers physico-technological aspects of receiving nanostructural topocomposite coatings in terms of the cascade cross effect based on the special cathodic system, making possible ionic-plasma processing simultaneously with the use of three cathodes in a pulse mode. The authors carry out theoretical and experimental researches of forming concentration profiles of element distribution in surface layers of the bilayer 'film-base' system. They determine the features of mass transfer processes developing in response to cascade cross effect. It is demonstrated that due to the mutual diffusion of the film and the base elements in the field of the phase boundary in the 'film-base' system a transition area is formed. Its dimensions can be associated with the thickness of the nanofilm. The authors give an example of receiving a multilayer nanostructural composition in terms of cascade cross effect.

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The Biosurfactant Surfactin as a Kinetic Promoter for Methane Hydrate Formation

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Energy Procedia 2017年 105卷 5011-5017页

作者： Gaurav Bhattacharjee Vivek Barmecha Darshan Pradhan Rajesh Naik Kirti Zare Rahul B. Mawlankar Syed G. Dastager Omkar S. Kushwaha Rajnish Kumar Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune 411008 Maharashtra India Chemical Engineering Department Padmashree Dr. D. Y. Patil Institute of Engineering Management and Research Pune 411044 Maharashtra India NCIM Resource Center CSIR-National Chemical Laboratory Pune 411008 Maharashtra India

In the present study, the effect of the biosurfactant Surfactin on methane hydrate formation kinetics was studied. Initially, several marine derived species were screened for the presence of Surfactin. The polymerase chain reaction technique was used as the preliminary screening step for Surfactin which was then followed up by a couple of different assays to provide conclusive evidence of the same. Based on these tests, the D-9 bacterial strain was identified as a producer of Surfactin. Once the presence of Surfactin had been proven, its effect on methane hydrate formation kinetics was investigated upon by carrying out hydrate formation experiments in a stirred tank reactor. The cell free supernatant containing Surfactin was itself used as the hydrate forming solution without any further processing. It was found that the presence of Surfactin in the system greatly enhances hydrate formation kinetics as compared to pure water. In fact the kinetics in presence of Surfactin also surpassed that obtained with 1 wt% SDS, the most commonly used synthetic kinetic hydrate promoter. This basic study can pave the way for more sophisticated research on the use of biosurfactants as kinetic promoters with a view on rapid methane hydrate formation kinetics for applications such as methane separation, storage and transport.

关键词： Gas hydrate biosurfactant lipopeptide kinetic promoter gas uptake

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Direct Synthesis of Multiplexed Metal‐Nanowire‐Based Devices by Using Carbon Nanotubes as Vector Templates

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Angewandte Chemie 2019年第29期131卷

作者： Pierrick Clément Xinzhao Xu Craig T. Stoppiello Graham A. Rance Antonio Attanzio James N. O'Shea Robert H. Temperton Andrei N. Khlobystov Kevin R. J. Lovelock Jake M. Seymour Richard M. Fogarty Alastair Baker Richard A. Bourne Brendan Hall Thomas W. Chamberlain Matteo Palma School of Biological and Chemical Sciences Materials Research Institute Queen Mary University of London London E1 4NS UK School of Chemistry University of Nottingham Nottingham NG7 2RD UK The Nanoscale and Microscale Research Centre University of Nottingham Nottingham NG7 2RD UK School of Physics University of Nottingham Nottingham NG7 2RD UK School of Chemistry Food and Pharmacy University of Reading Reading RG6 6AT UK Department of Chemistry Imperial College London London SW7 2AZ UK Institute of Process Research and Development School of Chemistry and School of Chemical and Process Engineering University of Leeds Leeds LS2 9JT UK

We present the synthesis of metal nanowires in a multiplexed device configuration using single‐walled carbon nanotubes (SWNTs) as nanoscale vector templates. The SWNT templates control the dimensionality of the wires, allowing precise control of their size, shape, and orientation; moreover, a solution‐processable approach enables their linear deposition between specific electrode pairs in electronic devices. Electrical characterization demonstrated the successful fabrication of metal nanowire electronic devices, while multiscale characterization of the different fabrication steps revealed details of the structure and charge transfer between the material encapsulated and the carbon nanotube. Overall the strategy presented allows facile, low‐cost, and direct synthesis of multiplexed metal nanowire devices for nanoelectronic applications.

关键词： Elektronische Baugruppen Nanostrukturen Nanotechnologie Nanoröhren Templatsynthese

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The effect of organic acids and sulfur dioxide on C4 compound production and ß-glucosidase activity of Oenococcus oeni from wines under acidic conditions

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International Journal of Wine research 2016年 8卷 19-28页

作者： Maturano, Carmen Rivero, Luciana del Valle Vaquero, María José Rodríguez Saguir, Fabiana María Institute for Research and Development in Process Engineering Biotechnology and Alternative Energy (PROBIEN CONICET) Faculty of Engineering National University of Comahue Neuquén Argentina Institute of Microbiology Faculty of Biochemistry Chemistry and Pharmacy National University of Tucuman Tucumán Argentina

The purpose of this work was to investigate the effect of l-malic and citric acids and SO2 on two biochemical properties (diacetyl/acetoin/2,3-butanediol formation and β-glucosidase activity) relevant to flavor devel... 详细信息

The purpose of this work was to investigate the effect of l-malic and citric acids and SO₂ on two biochemical properties (diacetyl/acetoin/2,3-butanediol formation and β-glucosidase activity) relevant to flavor development in six Oenococcus oeni strains from wines at pH 4.8 and 3.8. Cells were cultured in MRS without citrate (control medium) and combined with l-malic acid (2 g/L), citric acid (0.7 g/L), and SO₂ (80 mg/L) at pH 4.8 and 3.8. All the test strains grew at all conditions tested including in the presence of SO₂ and at initial pH 3.8, even though growth parameters were maximum in the presence of both the acids at pH 4.8. Organic acids were depleted totally regardless of the condition examined, in which degradation of l-malic acid was faster than that of citric acid. Diacetyl, acetoin, and 2,3-butanediol levels significantly varied depending on the strain for a given condition, for example, at pH 4.8 in control medium the highest value (6.55±0.31 mg/L, strain MS25) represented almost threefold the lowest one (2.43±0.22 mg/L, strain MS9). There was also variability for each strain depending on the initial pH (strains MS25, MS27, and MS48) and the presence of organic acids (all strains except MS25) but not SO₂. In addition, among strains there was a trend toward mainly diacetyl formation (55%-75%). O. oeni MS9, MS20, and MS46 yielding adequate diacetyl levels were selected for investigating specific β-glucosidase activity and its possible cell localization. Cell suspensions of all the selected strains exhibited positive activities at both pH values which were > 4.8. As observed for C4 compounds, organic acids stimulated this activity (28%-49% at pH 4.8;~20% at pH 3.8), thus partially reverting the inhibition caused by acid stress, while SO₂ did not affect it. The use of different cell fractions (permeabilized cells, cell protoplasts, and cell extracts) associated this activity to the cell surface. Results

关键词： Aroma Enzymatic activity Metabolism O. oeni Wine

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