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Application of electric system cascade analysis for various system configuration

chemical engineering Transactions 2017年 61卷 943-948页

作者： Lee, Ming Yang Ho, Wai Shin Hashim, Haslenda Muis, Zarina Abdul Liu, Wen Hui Rozali, Nor Erniza Mohammad Klemeš, Jiří Jaromír Universiti Teknologi Malaysia Skudai Johor81310 Malaysia Universiti Teknologi Malaysia Johor81310 Malaysia Department of Chemical Engineering Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak32610 Malaysia Sustainable Process Integration Laboratory - SPIL NETME Centre Faculty of Mechanical Engineering Brno University of Technology VUT Brno Technická 2896/2 Brno616 69 Czech Republic

Ongoing primary reliance on conventional fossil fuel resources such as coal and natural gas (NG) for energy generation may be the most economical method but also the most damaging to the environment. Energy management of power plant via sizing is one of the energy and economical saving methods. In this paper, Electric System Cascade Analysis (ESCA), an analytical pinch method is used for optimally size the generation capacity of power plant and storage capacity of energy storage. Energy can be direct current or alternating current, which require rectifier or converter to convert the energy before transporting. Therefore, energy system configuration has various combination depending on the type of currents on each part of the system configuration. The usage of ESCA will be applied on eight types of system configuration. A hypothetical case study is used to demonstrate the application of ESCA. Results show that the least energy lost due to energy conversion is the system configuration with the same type of current input and output. Copyright © 2017, AIDIC Servizi S.r.l.

关键词： Energy conversion

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Investigations of mass transfer in annular gas-liquid flow in a microreactor

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2016年第1期37卷 55-64页

作者： Sobieszuk, Pawel Napieralska, Karolina Faculty of Chemical and Process Engineering Warsaw University of Technology Warynskiego1 Warsaw00-645 Poland

The paper presents an investigation of mass transfer in gas-liquid annular flow in a microreactor. The microreactor had a meandered shape with a square cross-section of the channel (292×292 μm, hydraulic diameter 292 μm) and 250 mm in length. The rate of CO2 absorption from the CO2/N2 mixture in NaOH (0.1 M, 0.2 M, 0.7 M, 1.0 M and 1.5 M) water solutions was measured. Two velocities of gas flow and two velocities of liquid flow were used. In two cases a fully developed annular flow at the beginning of the channel was observed, whilst in two cases annular flow was formed only in about 2/3 of the microchannel length. Based on the measurements of CO2 absorption rate, the values of volumetric liquid - side mass transfer coefficients with the chemical reaction were determined. Then physical values of coefficients were found. Obtained results were discussed and their values were compared with the values predicted by literature correlations.

关键词： Mass transfer

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Corrigendum to “Hydrogen production from biomass using dark fermentation” [Renew Sustain Energy Rev 91 (2018) 665–94]

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Renewable and Sustainable Energy Reviews 2018年 95卷 354-354页

作者： Rafał Łukajtis Iwona Hołowacz Karolina Kucharska Marta Glinka Piotr Rybarczyk Andrzej Przyjazny Marian Kamiński Faculty of Chemistry Department of Chemical and Process Engineering Gdańsk University of Technology 11/12 Gabriela Narutowicza Street 80-233 Gdańsk Poland Faculty of Chemistry Department of Analytical Chemistry Gdańsk University of Technology 11/12 Gabriela Narutowicza Street 80-233 Gdańsk Poland Department of Chemistry & Biochemistry Kettering University Flint MI 48504 USA

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Adsorption of Cu(II) Ions in Aqueous Solutions by HCl Activated Carbon of Oil Palm

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IOP Conference Series: Materials Science and engineering 2017年第1期206卷

作者： A Muslim Y Syamsuddin A Salamun Abubakar D Ramadhan D Peiono Process Technology Laboratory Department of Chemical Engineering Faculty of Engineering Syiah Kuala University Banda Aceh 23111 Indonesia

Activated carbon was prepared from oil palm empty fruit bunch (OPEFB) by pyrolysis at 873.15 K in a furnace and chemical activation using 0.01 M HCl. Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and BET (Brunauer, Emmett and Teller) surface area analyses were taken into account to investigate the chemical functional group, to characterise the surface morphology and to determine total surface area the OPEFB AC, respectively. Experiments in batch mode were conducted to investigate Cu(II) adsorption capacity by the OPEFB AC whereas the system consisted of 1 g the OPEFB AC in 100 mL Cu(II) aqueous solution with initial concentration in the range of 10-70 mg/L, magnetic stirring at 75 rpm, room temperature of 300.15 K (± 2 K), at 1 atm and neutral pH over contact time in the range of 0-150 min. As the result, Cu(II) adsorption capacity increased exponentially over contact time and initial concentration. The Cu(II) adsorption kinetics followed the pseudo second order kinetics with the correlation coefficients (R 2), kinetics rate constant and equilibrium adsorption capacity being 0.98, 4.81 mg/g and 0.15/min, respectively for initial Cu(II) concentration being 58.71 mg/L. In addition, Cu(II) adsorption isotherm followed the Langmuir equation with the R2 value, the mono-layer and over-all adsorption capacity being 0.99, 5.92 mg/g and 0.17 L/mg, respectively.

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Trends in chemometrics and meat products

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IOP Conference Series: Earth and Environmental Science 2019年第1期333卷

作者： P Putnik D Granato A Gomes Da Cruz O Ye Rodionova A Pomerantsev G Rocchetti L Lucini D Bursac Kovacevic Faculty of Food Technology and Biotechnology University of Zagreb Pierottijeva 6 10000 Zagreb Croatia Department of Food Engineering State University of Ponta Grossa Av. Carlos Cavalcanti 4748 84030-900 Ponta Grossa Brazil Dept. de Alimentos Inst. Federal de Educacao Ciencia e Tecnologia (IFRJ) 20270-021 Rio de Janeiro Brazil Semenov Institute of Chemical Physics RAS Kosygin str. 4 119991 Moscow Russia Department for Sustainable Food Process Università Cattolica del Sacro Cuore Via Emilia Parmense 84 29122 Piacenza Italy

Chemometrics is a set of mathematical and statistical methods that are used to detect food fraud, predict microbial growth, and optimize design of experiments, while extracting useful information from large and complex datasets. Complex datasets quite often have numerous sources of variations, with one or more dependent variables assessed against the two or more dependent variables, hence the need to employ some type of multivariate statistics. It is critical to decrease the chances of type I error, by comparing (calculating) all the effects of independent variables in a single multivariate test. The most common types of multivariate tests include multivariate analysis of variance (MANOVA), various forms of factor analysis (such as principal component analysis, PCA), and mathematical modeling. Bioactive compounds of plant origin possess desirable health benefits and hence are interesting for functional meat processing. The extraction and processing of bioactive compounds mostly revolve around the central problems of thermal (in)stability and environmental issues that are relevant for industry. Here, multivariate statistics can offer the best mathematical solutions for optimal industrial production or can devise various indexes that are able to follow changes of the entire chemical footprint during the extraction of target compounds. For instance, multivariate statistics is useful to determine optimal extraction parameters for antioxidants, while simultaneously evaluating the effects and interactions of extraction parameters.

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Biofouling reduction for improvement of depth Water filtration. Filter production and testing

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2016年第3期37卷 319-330页

作者： Sztuk-Sikorska, Ewa Gradon, Leon Warsaw University of Technology Faculty of Chemical and Process Engineering ul. Warynskiego 1 Warsaw00-645 Poland

Water is a strategic material. Recycling is an important component of balancing its use. Deep-bed filtration is an inexpensive purification method and seems to be very effective in spreading water recovery. Good filter designs, such as the fibrous filter, have high separation efficiency, low resistance for the up-flowing fluid and high retention capacity. However, one of the substantial problems of this process is the biofouling of the filter. Biofouling causes clogging and greatly reduces the life of the filter. Therefore, the melt-blown technique was used for the formation of novel antibacterial fibrous filters. Such filters are made of polypropylene composites with zinc oxide and silver nanoparticles on the fiber surface. These components act as inhibitors of bacterial growth in the filter and were tested in laboratory and full scale experiments. Antibacterial/bacteriostatic tests were performed on Petri dishes with E. coli and B. subtilis. Full scale experiments were performed on natural river water, which contained abiotic particles and mutualistic bacteria. The filter performance at industrial scale conditions was measured using a particle counter, a flow cytometer and a confocal microscope. The results of the experiments indicate a significant improvement of the composite filter performance compared to the regular fibrous filter. The differences were mostly due to a reduction in the biofouling effect.

关键词： Biofouling

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Dynamics of particle loading in deep-bed filter. Transport, deposition and reentrainment

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2016年第3期37卷 405-417页

作者： Przekop, Rafal Gradoń, Leon Warsaw University of Technology Faculty of Chemical and Process Engineering ul. Waryńskiego 1 Warsaw00-645 Poland

Deep bed filtration is an effective method of submicron and micron particle removal from the fluid stream. There is an extensive body of literature regarding particle deposition in filters, often using the classical continuum approach. However, the approach is not convenient for studying the influence of particle deposition on filter performance (filtration efficiency, pressure drop) when nonsteady state boundary conditions have to be introduced. For the purposes of this work the lattice-Boltzmann model describes fluid dynamics, while the solid particle motion is modeled by the Brownian dynamics. For aggregates the effect of their structure on displacement is taken into account. The possibility of particles rebound from the surface of collector or reentrainment of deposits to fluid stream is calculated by energy balanced oscillatory model derived from adhesion theory. The results show the evolution of filtration efficiency and pressure drop of filters with different internal structure described by the size of pores. The size of resuspended aggregates and volume distribution of deposits in filter were also analyzed. The model enables prediction of dynamic filter behavior. It can be a very useful tool for designing filter structures which optimize maximum lifetime with the acceptable values of filtration efficiency and pressure drop.

关键词： Porous materials

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Performance evaluation of low-temperature solid oxide fuel cells with SDC-based electrolyte

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chemical engineering Transactions 2016年 52卷 223-228页

作者： Saebea, Dang Authayanun, Suthida Patcharavorachot, Yaneeporn Arpornwichanop, Amornchai Department of Chemical Engineering Faculty of Engineering Burapha University Chonburi20131 Thailand Srinakharinwirot University Department of Chemical Engineering Faculty of Engineering Nakorn Nayok26120 Thailand School of Chemical Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok10520 Thailand Computational Process Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand

ISBN: (纸本)9788895608426

A mathematical model has been known to be an important tool for designing and improving chemical processes. The aim of this work is to develop an electrochemical model of low-temperature solid oxide fuel cell (SOFC) with SDC-based electrolyte. To analyze the ohmic, activation and concentration overpotentials occurring within the fuel cell, the structural and operational parameters and mass transport of gases in porous electrodes are taken account into the electrochemical model. The predicted current density-voltage curves at operating temperatures of 500 and 600 °C are in good agreement with the experimental data. The validated model of the low temperature SOFC is used to assess the SOFC performance. The effects of anode thickness and operating temperatures of SOFC with SDC-based electrolyte are investigated. The results demonstrate that an increase in the anode thickness results in a significant increase in the anode concentration overpotential, whereas the activation overpotentials increase with increasing anode thickness at high current densities. In addition, the increase of operating temperature reduces the activation and ohmic overpotentials. Copyright © 2016, AIDIC Servizi S.r.l.

关键词： Anodes

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SOFC running on steam reforming of biogas: External and internal reforming

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chemical engineering Transactions 2016年 52卷 361-366页

作者： Authayanun, Suthida Pornjarungsak, Thongchat Prukpraipadung, Thanawat Saebea, Dang Arpornwichanop, Amornchai Patcharavorachot, Yaneeporn Department of Chemical Engineering Faculty of Engineering Srinakharinwirot University Nakhon Nayok26120 Thailand Department of Chemical Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok10520 Thailand Department of Chemical Engineering Faculty of Engineering Burapha University Chonburi20131 Thailand Computational Process Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand

ISBN: (纸本)9788895608426

In this work, two approaches of SOFC operation fuelled by biogas are considered: one where the endothermic steam reforming and electrochemical reaction are operated in different units (external reforming SOFC) and another where biogas is introduced to the SOFC stack and directing reformed on the anode side (internal reforming SOFC). The model of SOFC system is designed and developed using Aspen Plus simulator software. Equilibrium gas composition obtained from steam reforming reaction can be calculated based on Gibbs free energy minimization method. Electrochemical equations taking into account all voltage losses (activation, ohmic and concentration lo sses) are written in a calculator block by Fortran code. Effect of operating conditions, i.e. temperature, pressure and steam to carbon molar ratio on SOFC performances is examined. From the simulation results, it was found that under the same operation conditions (steam to carbon molar ratio of 0.5, SOFC temperature of 1,173 K and SOFC pressure of 3 atm), the internal reforming SOFC has higher electrical efficiency (24 %) than external reforming SOFC (85.67 %). However, when the carbon dixide emission is considered, the simulation result reveals that the anode exhuast gas of the internal reforming SOFC has higher amount of carbon dioxide (7.4 %) compared with that of the external reforming SOFC (1.4 %(. Copyright © 2016, AIDIC Servizi S.r.l.

关键词： Solid oxide fuel cells (SOFC)

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Innenrücktitelbild: Supramolecularly Assembled Nanocomposites as Biomimetic Chloroplasts for Enhancement of Photophosphorylation (Angew. Chem. 3/2019)

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Angewandte Chemie 2018年第3期131卷

作者： Yue Li Xiyun Feng Anhe Wang Yang Yang Jinbo Fei Bingbing Sun Yi Jia Junbai Li Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Lab of Colloid Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology Beijing 100190 China Yunnan Normal University Faculty of Chemistry and Chemical Engineering Kunming 650050 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academic of Sciences Beijing 100049 China

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