scholarly journals Secure Component Distribution Using WebCom

2002 ◽  
pp. 387-398 ◽  
Author(s):  
Simon N. Foley ◽  
Thomas B. Quillinan ◽  
John P. Morrison
Keyword(s):  
Component Distribution

scholarly journals Evolution of Internal Stress in Heterogeneous Electrode Composite during the Drying Process

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1683
Author(s):  
Zuoquan Zhu ◽  
Yaolong He ◽  
Hongjiu Hu ◽  
Fangzhou Zhang
Keyword(s):  
Internal Stress ◽  
Vinylidene Fluoride ◽  
Influence Factors ◽  
Lithium Ion ◽  
Integrated Analysis ◽  
Drying Time ◽  
Component Distribution ◽  
Poly Vinylidene Fluoride ◽  
Inactive Ingredients ◽  
Main Influence

The mechanical behavior of electrode composite during the drying preparation has played a crucial role in the electrochemical performance of lithium-ion batteries (LIBs). Our work aimed at developing an integrated analysis method to study the component distribution, mechanical properties, and internal stress of composite coating in the process of electrode drying. The main influence factors of drying stress were thoroughly investigated. It was found that this present model could capture not only the heterogeneity effect of inactive ingredients but also the porosity-dependent viscoelasticity of electrode composite. Meanwhile, the calculated effective modulus and stress evolution upon drying time were in acceptable accord with the experimental data. Furthermore, the rapid solidification markedly increased the drying stress in electrodes and significantly impaired the tensile strength of electrode composite due to the highly gradient distributed constituents. However, the stress level at high drying temperature could be significantly reduced by an aqueous sodium alginate binder instead of poly(vinylidene fluoride). The obtained results will be a great help in efficiently manufacturing LIB electrodes with adequate mechanical integrity.

Validated Analysis of Component Distribution Inside Perovskite Solar Cells and Its Utility in Unveiling Factors of Device Performance and Degradation

2020 ◽  
Vol 12 (20) ◽  
pp. 22730-22740 ◽  
Author(s):  
Cheng-Hung Hou ◽  
Shu-Han Hung ◽  
Li-Ji Jhang ◽  
Keh-Jiunh Chou ◽  
Yu-Kai Hu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Device Performance ◽  
Component Distribution

Optimisation of Magnification Levels for near Infrared Chemical Imaging of Blending of Pharmaceutical Powders

2007 ◽  
Vol 15 (3) ◽  
pp. 137-151 ◽  
Author(s):  
Hua Ma ◽  
Carl A. Anderson
Keyword(s):  
Near Infrared ◽  
Image Data ◽  
Principal Component ◽  
Chemical Imaging ◽  
Field Of View ◽  
Pharmaceutical Dosage Forms ◽  
Component Distribution ◽  
Circular Field ◽  
Pharmaceutical Powder ◽  
Magnification Level

A critical parameter in the evaluation of pharmaceutical dosage forms by hyperspectral imaging is the level of magnification. If the magnification (as set by the optical objective) is inadequate to resolve the relevant features, then the value of the imaging is diminished; if the magnification level is greater than is required, then the field of view is unnecessarily reduced. The purpose of this study was to determine an optimum magnification level for the study of powder mixing. Relevant features in this system include distribution of individual components within samples and the overall content of a given sample. In the present study, three magnification levels of near infrared (NIR) chemical imaging objectives were evaluated for their effects on imaging a blend of pharmaceutical materials (powders). High, medium and low objective magnification levels were investigated by comparing the resulting blend surface images of a two-component (salicylic acid and lactose) pharmaceutical powder mixture. Multiple images from high and medium magnification were concatenated so that an equivalent field of view was obtained for all magnification levels. Univariate images, principal component analysis score images, partial least squares predicted images and spectra extracted from different intensity regions in the area images were analysed qualitatively and quantitatively for comparison. A series of images spanning a strip across the centre of the circular field were collected at each magnification level and compared with respect to surface features elucidated and area of blend surface imaged. Analyses of images indicate that the three magnification levels delineate the component distribution for this particular powder system similarly. Images obtained at the low magnification level demonstrated adequate resolution and provided the broadest view of the blend surface. It is concluded that the low optical magnification level was adequate for the system being studied and is the preferred mode for pharmaceutical powder blend image data collection for this system.

Improved Histologic Analysis of Component Distribution and Wall Behavior in Cyanoacrylate-Embolized Vessels

2001 ◽  
Author(s):  
William J. Calvo ◽  
Baruch B. Lieber ◽  
Ajay K. Wakhloo ◽  
L. Nelson Hopkins
Keyword(s):  
Acetic Acid ◽  
Contrast Agent ◽  
Treatment Modality ◽  
Arteriovenous Malformations ◽  
Glacial Acetic Acid ◽  
Cerebral Vasculature ◽  
Polymerization Time ◽  
Component Distribution ◽  
Embolic Agents ◽  
The Us

Abstract Use of embolic agents is currently an accepted treatment modality among neurointerventional clinicians in order to completely occlude abnormal shunts in the cerebral vasculature known as arteriovenous malformations or AVMs. The first cyanoacrylate polymer recently approved by the US Food and Drug Administration for use in humans is n-butyl 2-cyanoacrylate (NBCA). In order to control the polymerization time of NBCA, as well as to opacify the mixture for angiographic visualization, an iodized poppyseed oil-based contrast agent (Lipiodol) is added to the NBCA. Glacial acetic acid is also used to delay polymerization further by decreasing the pH of the mixture.

scholarly journals Liquid mixtures separation and heat consumption in the process of distillation

2021 ◽  
Vol 16 (1) ◽  
pp. 7-15
Author(s):  
M. K. Zakharov ◽  
A. V. Egorov ◽  
A. A. Podmetenny
Keyword(s):  
Mathematical Models ◽  
Energy Saving ◽  
Internal Energy ◽  
Initial Mixture ◽  
Liquid Mixtures ◽  
Heat Consumption ◽  
Reflux Ratio ◽  
Component Distribution ◽  
Study Results ◽  
Internal Energy Saving

Objectives. The aim of this study is to investigate different distillation modes of a binary ideal mixture and determine how various factors affect heat consumption in the column boilers. In addition, it intends to assess the difficulty of separating mixtures. Our research is based on analyzing the characteristics of vapor-liquid equilibrium.Methods. To conduct our study, we used a graphic-analytical tool to calculate the distillation process of a binary mixture and mathematical models based on the Aspen Plus software package along with DSTWU, RadFrac, and the Sensitivity module. We also used the Peng-Robinson equation (PENG-ROB) to determine the liquid-vapor equilibrium.Results. We employed the graphical method and mathematical models to obtain the operation parameters of two column variants for the distillation of binary ideal benzene-toluene mixtures. In each variant the initial mixture contained the same amount of the low- and high-boiling component. The number of plates in the column sections, reflux ratio, energy consumption, and indicators of internal energy saving were determined.Conclusions. Study results show that using the coefficient of the component distribution between the vapor and liquid phases is a promising method for preliminary assessments of the separation difficulty and measurements of the expected heat consumption in the boilers of columns. Comparison studies showed that the heat consumption in the boiler decreases as the internal energy saving in the columns increases.

scholarly journals Areas of energy advantage for flowsheets of separation modes for mixtures containing components with similar volatilities

2020 ◽  
Vol 15 (3) ◽  
pp. 7-20
Author(s):  
M. E. Peshekhontseva ◽  
M. A. Maevskiy ◽  
I. S. Gaganov ◽  
A. V. Frolkova
Keyword(s):  
Ethyl Acetate ◽  
Butyl Acetate ◽  
Energy Savings ◽  
Equilibrium Diagram ◽  
Distribution Coefficients ◽  
Local Composition ◽  
Component Distribution ◽  
Boiling Points ◽  
Relative Errors ◽  
Energy Advantage

Objectives. The conditions for the effective application of the sharp distillation technique (without a component distributed between the distillate and bottom flows) for the separation of quaternary zeotropic mixtures containing components with similar volatilities were determined. The area of energy advantage for the flowsheet based on the preliminary fractionation of the mixture, compared with the flowsheet, the first distillation column of which works based on the indirect separation mode, was identified for an ethyl acetate–benzene–toluene–butyl acetate system. Energy savings of up to 20% were achieved. The direct and indirect distillation modes can become competitive when the point of the original composition is located near single K-surfaces or in a region with a different ratio of distribution coefficients. Sharp distillation is not suitable for the separation of a mixture containing a pair of components exhibiting relative unity volatility with medium boiling points.Methods. The mathematical modeling in the Aspen Plus V.10.0 software package was chosen as the research method. The simulation was based on the Wilson local composition equation. The relative errors in the description of the phase equilibrium did not exceed 3%.Results. The structure of the vapor–liquid equilibrium diagram and diagram of surfaces of the unit component distribution coefficients were studied for the ethyl acetate–benzene–toluenebutyl acetate and acetone–toluene–butyl acetate–o-xylene systems. Flowsheets based on the sharp, indirect (both systems), or direct (second system) distillation modes were proposed. The distillation process was simulated, and the parameters of the column work were determined (the quality of the substances meets the State Standard requirements of the Russian Federation for minimal energy consumption).Conclusions. Recommendations regarding the use of sharp distillation for the separation of quaternary mixtures containing components with similar volatilities were devised.

Lanthanide-Based NMR: A Tool To Investigate Component Distribution in Mixed-Monolayer-Protected Nanoparticles

2012 ◽  
Vol 134 (17) ◽  
pp. 7200-7203 ◽  
Author(s):  
Gaetano Guarino ◽  
Federico Rastrelli ◽  
Paolo Scrimin ◽  
Fabrizio Mancin
Keyword(s):  
Mixed Monolayer ◽  
Component Distribution ◽  
Monolayer Protected Nanoparticles
Sign in / Sign up

Export Citation Format

Share Document