scholarly journals Soft Porous Crystal Based upon Organic Cages That Exhibit Guest-Induced Breathing and Selective Gas Separation

2019 ◽  
Vol 141 (23) ◽  
pp. 9408-9414 ◽  
Author(s):  
Zhifang Wang ◽  
Nivedita Sikdar ◽  
Shi-Qiang Wang ◽  
Xia Li ◽  
Meihui Yu ◽  
...  
Keyword(s):  
Gas Separation ◽  
Porous Crystal

scholarly journals Investigation of Duplex Brass Membranes with Metallography, Permeability and Treatments: Work-Hardening, Annealing and Quenching

2021 ◽  
Vol 5 (4) ◽  
pp. 76
Author(s):  
Sofia Kavafaki ◽  
George Bomis ◽  
Kyriaki Drakaki ◽  
Athanasios Varoutoglou ◽  
Konstantinos Kiourtzidis ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Gas Separation ◽  
Work Hardening ◽  
Materials Science ◽  
Low Permeability ◽  
Brass Alloy ◽  
Alloy Structure ◽  
Separation Processes ◽  
Porous Crystal ◽  
Inorganic Porous Materials

This paper consists of the fabrication and investigation of metal membranes and the study of their behaviour and applications in gas separation processes. The scope is to produce and characterize the porous crystal structure of brass alloy (standardization: DIN 17660) membranes and measure their permeability with helium as a penetrant medium. Another part of this study is to alter the brass alloy’s structure throughout metallurgical treatments and investigate how the permeability is allied to the structure’s alteration. This work merges the knowledge and technology of inorganic porous materials science in metallurgy. The novelty of the current research resides in the process to alternate the brass alloy structure throughout metallurgical treatments and how it is allied to the permeability of the membrane, which is of interest to be investigated. The results of the research are analysed and compared conducting the final inferences. All metallurgical treatments resulted in low permeability values when compared to a non-treated specimen. Specifically, the drop in permeance ranged from 76 up to 99.56%. It is noted that consecutive treatments contributed to even further decreases.

A SEM/TEM examination of a ceramic membrane

1986 ◽  
Vol 44 ◽  
pp. 682-683
Author(s):  
C.E. Voegele-Kliewer ◽  
A.D. McMaster ◽  
G.W. Dirks
Keyword(s):  
Electron Microscopy ◽  
Gas Separation ◽  
Ceramic Membrane ◽  
Hydrogen Iodide ◽  
Separation Processes ◽  
Corning Glass ◽  
Gas Transport Properties ◽  
Porous Microstructure ◽  
Microscopy Techniques ◽  
The Relationship

Materials other than polymers, e.g. ceramic silicates, are currently being investigated for gas separation processes. The permeation characteristics of one such material, Vycor (Corning Glass #1370), have been reported for the separation of hydrogen from hydrogen iodide. This paper will describe the electron microscopy techniques applied to reveal the porous microstructure of a Vycor membrane. The application of these techniques has led to an increased understanding in the relationship between the substructure and the gas transport properties of this material.

Applied Process Simulation-Driven Oil and Gas Separation Plant Optimization using Surrogate Modeling and Evolutionary Algorithms

2019 ◽  
Author(s):  
Anders Andreasen
Keyword(s):  
Evolutionary Algorithms ◽  
Gas Separation ◽  
Oil And Gas ◽  
Optimal Solution ◽  
Computer Experiment ◽  
Latin Hypercube Sampling ◽  
Surrogate Models ◽  
Inlet Temperature ◽  
Separation Plant ◽  
Separation Stage

In this article the optimization of a realistic oil and gas separation plant has been studied. Two different fluids are investigated and compared in terms of the optimization potential. Using Design of Computer Experiment (DACE) via Latin Hypercube Sampling (LHS) and rigorous process simulations, surrogate models using Kriging have been established for selected model responses. The surrogate models are used in combination with a variety of different evolutionary algorithms for optimizing the operating profit, mainly by maximizing the recoverable oil production. A total of 10 variables representing pressure and temperature various key places in the separation plant are optimized to maximize the operational profit. The optimization is bounded in the variables and a constraint function is included to ensure that the optimal solution allows export of oil with an RVP < 12 psia. The main finding is that, while a high pressure is preferred in the first separation stage, apparently a single optimal setting for the pressure in downstream separators does not appear to exist. In the second stage separator apparently two different, yet equally optimal, settings are revealed. In the third and final separation stage a correlation between the separator pressure and the applied inlet temperature exists, where different combinations of pressure and temperature yields equally optimal results.<br>

Physical Design, Preparation and Functionalization of Carbon Membranes for Gas Separation

2010 ◽  
Vol 25 (5) ◽  
pp. 449-456 ◽  
Author(s):  
Lin LI ◽  
Tong-Hua WANG ◽  
Yi-Ming CAO ◽  
Jie-Shan QIU
Keyword(s):  
Gas Separation ◽  
Physical Design ◽  
Carbon Membranes

Polymide/Fe3O4-carbonized Membranes for Gas Separation

2009 ◽  
Vol 25 (1) ◽  
pp. 47-52
Author(s):  
Xuan-Ying ZHAO ◽  
Tong-Hua WANG ◽  
Lin LI ◽  
Ying LIU ◽  
Yi-Ming CAO
Keyword(s):  
Gas Separation
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