Carbon-Based Membranes

MRS Bulletin ◽  
2006 ◽  
Vol 31 (10) ◽  
pp. 765-769 ◽  
Author(s):  
Tanja Pietraß
Keyword(s):  
Gas Separation ◽  
Inorganic Carbon ◽  
Synthetic Polymer ◽  
Surface Flow ◽  
Tubular Structures ◽  
Carbon Membranes ◽  
Precursor Material ◽  
Flow Through ◽  
Molecular Sieving ◽  
Carbon Based

AbstractInorganic carbon-based membranes for gas separation comprise materials that are fabricated through pyrolysis of a precursor material (often a synthetic polymer), and the more recently discovered carbon nanotubes. Fabrication, assembly into different architectures, and mechanism of operation are summarized for precursor-based carbon membranes, with a focus on selective surface flow and molecular sieving. Only preliminary work on carbon nanotube-based membranes for gas separation has been published. Their unusual transport properties, however, promise their use in gas separation in the future. In light of this application, structural properties and results relating to flow through these tubular structures are summarized.

Gas separation properties of molecular sieving carbon membranes with nanopore channels

Carbon ◽  
2004 ◽  
Vol 42 (5-6) ◽  
pp. 1169-1173 ◽  
Author(s):  
Hiroaki Hatori ◽  
Hideyuki Takagi ◽  
Yoshio Yamada
Keyword(s):  
Gas Separation ◽  
Carbon Membranes ◽  
Molecular Sieving

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

An approach to simulation of dual drainage

1999 ◽  
Vol 39 (9) ◽  
pp. 95-103 ◽  
Author(s):  
S. Djordjević ◽  
D. Prodanović ◽  
Č. Maksimović
Keyword(s):  
Numerical Model ◽  
Model Development ◽  
Ground Level ◽  
Surface Flow ◽  
Surface Excess ◽  
Runoff Simulation ◽  
Sewer System ◽  
Excess Water ◽  
Flow Through ◽  
The One

The paper presents the development of the field of urban drainage modelling known as dual drainage - an approach to rainfaill runoff simulation in which the numerical model takes into account not only the flow through the sewer system, but also the flow on the surface. The steps in model development are described, and necessary data, assumptions used and operations to be performed using GIS are discussed. The numerical model simultaneously handles the full dynamic equations of flow through the sewer system and simplified equations of the surface flow. The surface excess water (due to the limited capacity of inlets or to the hydraulic head in the sewer system reaching the ground level) is routed to the neighbour subcatchment (not necessarily the one attached to the downstream network node), using surface retentions, if any.

Recent advances in the development of supported carbon membranes for gas separation

2017 ◽  
Vol 42 (39) ◽  
pp. 24830-24845 ◽  
Author(s):  
Janice B.S. Hamm ◽  
Alan Ambrosi ◽  
Julia G. Griebeler ◽  
Nilson R. Marcilio ◽  
Isabel Cristina Tessaro ◽  
...  
Keyword(s):  
Gas Separation ◽  
Carbon Membranes ◽  
Recent Advances

scholarly journals Assessment of Mercury-Polluted Soils Adjacent to an Old Mercury-Fulminate Production Plant

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
M. Camps Arbestain ◽  
L. Rodríguez-Lado ◽  
M. Bao ◽  
F. Macías
Keyword(s):  
Surface Waters ◽  
Contaminated Soils ◽  
Flow Direction ◽  
Surface Flow ◽  
Mercury Contamination ◽  
Production Plant ◽  
Polluted Soils ◽  
Flow Through ◽  
Contamination Of Soils ◽  
Surrounding Soil

Mercury contamination of soils and vegetation close to an abandoned Hg-fulminate production plant was investigated. Maximum concentrations of Hg (>6.5 gkg−1soil) were found in the soils located in the area where the wastewater produced during the washing procedures carried out at the production plant used to be discharged. A few meters away from the discharge area, Hg concentrations decreased to levels ranging between 1 and 5 gkg−1, whereas about 0.5 ha of the surrounding soil to the NE (following the dominant surface flow direction) contained between 0.1 and 1 gkg−1. Mercury contamination of soils was attributed (in addition to spills from Hg containers) to (i) Hg volatilization with subsequent condensation in cooler areas of the production plant and in the surrounding forest stands, and (ii) movement of water either by lateral subsurface flow through the contaminated soils or by heavy runoff to surface waters.

scholarly journals A computational investigation of the hydrodynamics of the Badush dam in northern Iraq

2018 ◽  
Vol 240 ◽  
pp. 04009
Author(s):  
Younis Saida Saeedrashed ◽  
Ali Cemal Benim
Keyword(s):  
Three Dimensional ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Dam Failure ◽  
Northern Iraq ◽  
Digital Elevation ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
Elevation Model ◽  
Bottom Outlets

A computational analysis of the hydrodynamics of the Badush dam in Iraq is presented, which is planned to be reconstructed as a repulse dam, to prevent the Mosul city, in case of a failure of the Mosul dam. Computational Fluid Dynamics (CFD) is applied in combination with Geometric Information System (GIS) and Digital Elevation Model (DEM). In the first part of the study, a hydrologic study of a possible Mosul dam failure is performed, predicting the important parameters for a possible flooding of Mosul city. Here, a two-dimensional, depth-averaged shallow water equations are used to formulate the flow. Based on GIS and DEM, the required reservoir size and the water level of the Badush dam are predicted, for its acting as a repulse dam. Subsequently, a computational model of the reconstructed Badush dam is developed, combining the proposed construction with the local geographic topology to achieve a perfect fit. Finally, the water flow through the bottom outlets and stilling basin of the proposed dam is calculated by an unsteady, three-dimensional CFD analysis of the turbulent, free-surface flow. The CFD model is validated by comparing the predictions with measurements obtained on a physical model, where a quite satisfactory agreement is observed.

Preparation and Characterization of Carbon Membranes Derived from Poly(phthalazinone ether sulfone) for Gas Separation

2009 ◽  
Vol 48 (6) ◽  
pp. 2886-2890 ◽  
Author(s):  
Bing Zhang ◽  
Guoliang Shen ◽  
Yonghong Wu ◽  
Tonghua Wang ◽  
Jieshan Qiu ◽  
...  
Keyword(s):  
Gas Separation ◽  
Carbon Membranes
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