Kinetics and Characteristics of Soybean Oil and Protein Extracted by AOT Reverse Micelle Technology

The mass transfer process of soybean oil extracted by AOT reverse micelle was determined. Meanwhile, the physicochemical properties of oil and structural properties of protein were also investigated by gas chromatography (GC), Fourier infrared spectrum (FTIR), and amino acid analyzer. The results indicated that the mass transfer model can be set up as 1+2(1-x)-3(1-x)2/3=0.248•exp⁡(-720.8/T)•t. The reaction probably belongs to internal diffusion. The oil extracted by AOT reverse micelle was in better quality according to physicochemical analysis. The soybean protein almost retained its original structure in AOT reverse micelle by FTIR and amino acid analysis. Therefore, AOT reverse micelle is an attractive procedure for extracting oil and protein simultaneously.

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A Study of GOTHIC 8.0 Code Application to AP1000 Containment Response

Volume 3: Nuclear Safety and Security; Codes, Standards, Licensing and Regulatory Issues; Computational Fluid Dynamics and Coupled Codes ◽

10.1115/icone21-15014 ◽

2013 ◽

Author(s):

Guodong Wang ◽

Zhe Wang

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Mass Transfer Process ◽

Transfer Model ◽

Mass Transfer Model ◽

Containment Model ◽

Evaporation Heat ◽

Containment Shell ◽

Film Heat Transfer ◽

Inside Wall

The AP1000 containment model has been developed by using WGOTHIC version 4.2 code. Condensation heat and mass transfer from the volumes to the containment shell, conduction through the shell, and evaporation from the shell to the riser were all calculated by using the special CLIMEs model. In this paper, the latest GOTHIC version 8.0 code is used to model both condensation and evaporation heat and mass transfer process. An improved heat and mass transfer model, the diffusion layer model (DLM), is adopted to model the condensation on the inside wall of containment. The Film heat transfer coefficient option is used to model the evaporation on the outside wall of containment. As a preliminary code consolidation effort, it is possible to use GOTHIC 8.0 code as a tool to analysis the AP1000 containment response.

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An SPH-based mass transfer model for simulating hydraulic characteristics and mass transfer process of dammed rivers

Engineering With Computers ◽

10.1007/s00366-021-01354-2 ◽

2021 ◽

Author(s):

Hang Wan ◽

Yingzhu Mao ◽

Yanpeng Cai ◽

Ran Li ◽

Jingjie Feng ◽

...

Keyword(s):

Mass Transfer ◽

Transfer Process ◽

Mass Transfer Process ◽

Transfer Model ◽

Mass Transfer Model ◽

Hydraulic Characteristics

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Optimal Catalyst and Cocatalyst Precontacting in Industrial Ethylene Copolymerization Processes

Journal of Polymers ◽

10.1155/2016/8245203 ◽

2016 ◽

Vol 2016 ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

Paul Aigner ◽

Christian Paulik ◽

Apostolos Krallis ◽

Vasileios Kanellopoulos

Keyword(s):

Mass Transfer ◽

Catalyst Activity ◽

Plug Flow ◽

Mass Transfer Process ◽

Catalyst System ◽

Transfer Model ◽

Catalyst Activation ◽

Before And After ◽

Natta Catalyst ◽

Experimental Findings

In industrial-scale catalytic olefin copolymerization processes, catalyst and cocatalyst precontacting before being introduced in the polymerization reactor is of profound significance in terms of catalyst kinetics and morphology control. The precontacting process takes place under either well-mixing (e.g., static mixers) or plug-flow (e.g., pipes) conditions. The scope of this work is to study the influence of mixing on catalyst/cocatalyst precontacting for a heterogeneous Ziegler-Natta catalyst system under different polymerization conditions. Slurry ethylene homopolymerization and ethylene copolymerization experiments with 1-butene are performed in a 0.5 L reactor. In addition, the effect of several key parameters (e.g., precontacting time, and ethylene/hydrogen concentration) on catalyst activity is analyzed. Moreover, a comprehensive mass transfer model is employed to provide insight on the mass transfer process and support the experimental findings. The model is capable of assessing the external and internal mass transfer limitations during catalyst/cocatalyst precontacting process. It is shown that catalyst/cocatalyst precontacting is very important for the catalyst activation as well as for the overall catalyst kinetic behavior. The study reveals that there is an optimum precontacting time before and after which the catalyst activity decreases, while this optimum time depends on the precontacting mixing conditions.

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New explicit analytical solutions of equations for heat and mass transfer in a cooling tower energy system

Advances in Mechanical Engineering ◽

10.1177/1687814019896147 ◽

2019 ◽

Vol 11 (12) ◽

pp. 168781401989614

Author(s):

Qianjian Guo ◽

Xiaoni Qi ◽

Peng Sun ◽

Pengjiang Guo

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Analytical Solutions ◽

Cooling Tower ◽

Mass Transfer Process ◽

Energy System ◽

Transfer Model ◽

Elementary Functions ◽

Solutions Of Equations ◽

The One

The aim of this article is to develop an accurate and fast analytical method for heat and mass transfer model in a cooling tower energy system. Some algebraic explicit analytical solutions of the one-dimensional differential equation sets describing the coupled heat and mass transfer process in a cooling tower are derived. The explicit solutions have not yet been published before. The explicit equations of heat and mass transfer are expressed in elementary functions. By solving these differential equations in a cooling tower, the temperature distribution of liquid and gas, the moisture content in the air can be obtained in each section over the vertical height of the tower. A comparison of analytical and experimental results was given in this article, and good agreements were shown for the typical cases studied. The analytical solutions can serve as a benchmark to check the results of numerical calculation.

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Mass Transfer Flux at Solid-Liquid Contacting Interface

Food Science and Technology International ◽

10.1177/1082013203035261 ◽

2003 ◽

Vol 9 (3) ◽

pp. 193-199 ◽

Cited By ~ 5

Author(s):

J. Shi ◽

M. Le Maguer

Keyword(s):

Mass Transfer ◽

Cell Structure ◽

Solid Material ◽

Mass Transfer Process ◽

Liquid System ◽

Transfer Model ◽

Operational Parameters ◽

High Concentration ◽

Osmotic Treatment ◽

Solid Liquid

When cellular materials are immersed in a solution of high concentration, the mass transfer is considered a multi-component transport process in which simultaneous and countercurrent flows occur in the biological tissue. The mass transfer process of each component in the solid-liquid system is affected not only by operational parameters, but also by the presence of other components. The main driving force for the mass transfer phenomena is attributed to the concentration gradient between external and internal solid material, and the interaction among fluxes and tissue matrix. Matrix deformation and tissue shrinkage are important characteristics influencing mass transfer. The coupled mass transfer fluxes across the interface in an isothermal solid-liquid system were analysed by means of a film model as a function of the concentration gradients, based on the generalised multi-component mass transfer theories. Several possible situations of cell structure changes are discussed, and the effect of structural shrinkage on mass transfer is modelled in this study. The mass transfer model and parameters proposed in the present study is applicable to the unit operation such as osmotic treatment of cellular porous biomaterial.

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A Novel Mass Transfer Model to Describe the Separation Process in Reverse Osmosis of Glucose

International Journal of Chemical Engineering ◽

10.1155/2021/5179268 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Chenghan Chen ◽

Yanwei Wang ◽

Furong Tan ◽

Qili Zhu

Keyword(s):

Experimental Data ◽

Mass Transfer ◽

Reverse Osmosis ◽

Production Efficiency ◽

Mathematic Model ◽

Mass Transfer Process ◽

Theoretical Research ◽

Transfer Model ◽

Calculation Results ◽

Improve Production Efficiency

Basic and theoretical research on processes such as reverse osmosis (RO) is essential in the fermentation industry to improve production efficiency and reduce cost. Here, we focus on the RO concentration of glucose solutions. We constructed a mathematic model that incorporates various membrane and experimental parameters to characterize the mass transfer process of RO membrane and validated the model output with experimental data. Calculation results were highly consistent with the experimental data, demonstrating that this model can be useful for predicting the RO concentration process.

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A dynamic interaction mass transfer model for simulating the mass transfer process in extraction columns

Computers & Chemical Engineering ◽

10.1016/j.compchemeng.2005.12.018 ◽

2006 ◽

Vol 30 (6-7) ◽

pp. 978-988 ◽

Cited By ~ 4

Author(s):

Xiaojin Tang ◽

Guangshen Luo ◽

Hongbo Li ◽

Jiading Wang

Keyword(s):

Mass Transfer ◽

Transfer Process ◽

Mass Transfer Process ◽

Dynamic Interaction ◽

Transfer Model ◽

Mass Transfer Model

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Heat and Mass Transfer Model for the Thin Material Layer Consisting of Zinc-Containing Pellets in Rotary Hearth Furnace

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.789 ◽

2011 ◽

Vol 236-238 ◽

pp. 789-794

Author(s):

Ying Liu ◽

Nai Shuai Wang ◽

Zhi Wen ◽

Guo Feng Lou

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Control Volume ◽

Mass Transfer Process ◽

Transfer Model ◽

Mass Transfer Model ◽

State Equations ◽

Material Layer ◽

Metallization Rate ◽

Single Pellet

In this paper, a mathematical model is established to simulate heat and mass transfer process among the thin material layer consisting of zinc-containing pellets while being reduced in Rotary Heath Furnace (RHF). The material layer model is based on a single pellet model, coupling heat and mass transfer and chemical reactions. The model essentially involved solving the unsteady-state equations with appropriate initial and boundary conditions using the control volume formulation. Temperature distribution, gas phase concentration, metallization rate, and dezincing rate have been obtained and discussed.

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