Binary adsorption and desorption rates of propylene-propane mixtures on 13 X molecular sieves

1995 ◽  
Vol 5 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Y.-H. Huang ◽  
A.I. Liapis ◽  
Y. Xu ◽  
O.K. Crosser ◽  
J.W. Johnson
Keyword(s):  
Molecular Sieves ◽  
Binary Adsorption ◽  
Adsorption And Desorption

scholarly journals A quantitive microscale dynamic column breakthrough apparatus for measurement of unary and binary adsorption equilibrium on milligram quantities of adsorbent

2022 ◽  
Author(s):  
Nicholas Wilkins ◽  
James Sawada ◽  
Arvind Rajendran
Keyword(s):  
Activated Carbon ◽  
Adsorption Equilibrium ◽  
Low Cost ◽  
Small Scale ◽  
Binary Adsorption ◽  
Multicomponent Adsorption ◽  
Adsorption And Desorption ◽  
Zeolite 13X ◽  
Equilibrium Data ◽  
Breakthrough Experiments

A microscale dynamic column breakthrough (μDCB) apparatus with the ability to measure unary and binary adsorption equilibrium on a milligram-scale quantity of adsorbent is described. The μDCB is a low cost system that can be constructed through minor modifications of a commercial gas chromatograph and uses a thermal conductivity detector. The small scale of the apparatus allows for the rapid collection of dynamic column breakthrough experiments. The mass balances for adsorption and desorption experiments were derived along with a description of the blank. The μDCB apparatus was tested with 238.9 mg of zeolite 13X and 180.2 mg of activated carbon with single-component N2/He and CH4/He adsorption and desorption measurements. The measured equilibrium data agreed well with volumetrically collected data. These measurements are both accurate and precise. Multicomponent adsorption was also studied on zeolite 13X and activated carbon for CH4/N2 and CO2/CH4 mixtures. This data was compared with ideal and adsorbed solution theory, extended dual-site Langmuir calculations and the literature.

H2/D2 adsorption and desorption studies on carbon molecular sieves with different pore structures

Carbon ◽  
2013 ◽  
Vol 57 ◽  
pp. 239-247 ◽  
Author(s):  
Ivana Krkljus ◽  
Theodore Steriotis ◽  
Georgia Charalambopoulou ◽  
Anastasios Gotzias ◽  
Michael Hirscher
Keyword(s):  
Molecular Sieves ◽  
Carbon Molecular Sieves ◽  
Adsorption And Desorption ◽  
Pore Structures

In vitro assembly of 2-D crystals from partially purified EA1 protein secreted by Bacillus anthracis strain Delta Sterne-1

1994 ◽  
Vol 52 ◽  
pp. 276-277
Author(s):  
Mary Beth Downs ◽  
Wilson Ribot ◽  
Joseph W. Farchaus
Keyword(s):  
Cell Wall ◽  
Molecular Sieves ◽  
Cell Envelope ◽  
Single Species ◽  
Supporting Cell ◽  
Surface Layers ◽  
Rabbit Igg ◽  
In Vitro Assembly ◽  
Covalently Linked

Many bacteria possess surface layers (S-layers) that consist of a two-dimensional protein lattice external to the cell envelope. These S-layer arrays are usually composed of a single species of protein or glycoprotein and are not covalently linked to the underlying cell wall. When removed from the cell, S-layer proteins often reassemble into a lattice identical to that found on the cell, even without supporting cell wall fragments. S-layers exist at the interface between the cell and its environment and probably serve as molecular sieves that exclude destructive macromolecules while allowing passage of small nutrients and secreted proteins. Some S-layers are refractory to ingestion by macrophages and, generally, bacteria are more virulent when S-layers are present.When grown in rich medium under aerobic conditions, B. anthracis strain Delta Sterne-1 secretes large amounts of a proteinaceous extractable antigen 1 (EA1) into the growth medium. Immunocytochemistry with rabbit polyclonal anti-EAl antibody made against the secreted protein and gold-conjugated goat anti-rabbit IgG showed that EAI was localized at the cell surface (fig 1), which suggests its role as an S-layer protein.

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