Note Concerning the Monolayer Capacity

1974 ◽  
Vol 52 (24) ◽  
pp. 2510-2512
Author(s):  
P. Mendoza ◽  
J. M. Rodríguez ◽  
L. Alzamora
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Isotherms ◽  
Spreading Pressure ◽  
Monolayer Capacity

When the derivative of spreading pressure with respect to adsorbed volume is obtained for the adsorption isotherms of nitrogen, oxygen, and carbon dioxide on ZnO between 75.6 and 208.8 K, a maximum is found for the capacity of the monolayer.

Adsorption isotherms and kinetics of carbon dioxide on Chinese dry coal over a wide pressure range

Adsorption ◽  
2015 ◽  
Vol 21 (1-2) ◽  
pp. 53-65 ◽  
Author(s):  
Yongchen Song ◽  
Wanli Xing ◽  
Yi Zhang ◽  
Weiwei Jian ◽  
Zhaoyan Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Isotherms ◽  
Pressure Range ◽  
Adsorption Isotherms And Kinetics ◽  
Wide Pressure Range ◽  
Kinetics Of ◽  
Wide Pressure

Determination of adsorption isotherms and solute activities from spreading pressure-surface charge data

1977 ◽  
Vol 62 (3) ◽  
pp. 454-460 ◽  
Author(s):  
Sherril D Christian ◽  
Glenn Dryhurst ◽  
Viktor Brabec ◽  
James G Baker
Keyword(s):  
Surface Charge ◽  
Adsorption Isotherms ◽  
Spreading Pressure ◽  
Pressure Surface

scholarly journals Carbon Dioxide Capture in Homogeneous and Heterogeneous Surfaces of Porous Silica Glass

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1260
Author(s):  
Chontira Boonfung ◽  
Chaiyot Tangsathitkulchai ◽  
Atichat Wongkoblap
Keyword(s):  
Carbon Dioxide ◽  
Functional Groups ◽  
Adsorption Isotherms ◽  
Silica Glass ◽  
Surface Defects ◽  
Porous Silica ◽  
Surface Heterogeneity ◽  
Slit Pore ◽  
Porous Silica Glass ◽  
Carbon Dioxide Co2

Experimental and simulation studies for carbon dioxide (CO2) adsorption on porous silica glass were performed to reveal how surface heterogeneity can affect the adsorption mechanism of CO2. In performing the simulation, the structure of porous silica glass was modeled as a slit pore consisting of parallel walls of connected SiO4 units. The adsorption isotherms of CO2 at 283 K were generated for a series of pore widths using a Monte Carlo ensemble. The defective surfaces created by random removal of surface atoms and the surfaces containing hydroxyl functional groups were chosen to represent the surface heterogeneity for the simulation tasks. The isotherms derived for the defective surfaces showed a rapid adsorption at low pressures because of the stronger interaction between the rough nonuniform surfaces and CO2 molecules. For the role of surface functional groups, the adsorption isotherms dramatically increased with an increasing number of functional groups. The amount of CO2 adsorbed for randomly placed functional groups was greater than that for the presence of functional groups at the pore edges. The proper control of surface heterogeneity by manipulating both the amounts of hydroxyl surface groups and surface defects should help enhance the efficient capture of CO2 in porous silica glass.

scholarly journals Interfacial energetics of globular–blood protein adsorption to a hydrophobic interface from aqueous-buffer solution

2005 ◽  
Vol 3 (7) ◽  
pp. 283-301 ◽  
Author(s):  
Anandi Krishnan ◽  
Yi-Hsiu Liu ◽  
Paul Cha ◽  
David Allara ◽  
Erwin A Vogler
Keyword(s):  
Protein Adsorption ◽  
Adsorption Isotherms ◽  
Contact Angles ◽  
Observation Time ◽  
Blood Protein ◽  
Buffer Solution ◽  
Self Assembled Monolayer ◽  
Spreading Pressure ◽  
Aqueous Buffer ◽  
Interfacial Energetics

Adsorption isotherms of nine globular proteins with molecular weight (MW) spanning 10–1000 kDa confirm that interfacial energetics of protein adsorption to a hydrophobic solid/aqueous-buffer (solid–liquid, SL) interface are not fundamentally different than adsorption to the water–air (liquid–vapour, LV) interface. Adsorption dynamics dampen to a steady-state (equilibrium) within a 1 h observation time and protein adsorption appears to be reversible, following expectations of Gibbs' adsorption isotherm. Adsorption isotherms constructed from concentration-dependent advancing contact angles θ a of buffered-protein solutions on methyl-terminated, self-assembled monolayer surfaces show that maximum advancing spreading pressure, , falls within a relatively narrow band characteristic of all proteins studied, mirroring results obtained at the LV surface. Furthermore, Π a isotherms exhibited a ‘Traube-rule-like’ progression in MW similar to the ordering observed at the LV surface wherein molar concentrations required to reach a specified spreading pressure Π a decreased with increasing MW. Finally, neither Gibbs' surface excess quantities [ Γ sl − Γ sv ] nor Γ lv varied significantly with protein MW. The ratio {[ Γ sl − Γ sv ]/ Γ lv }∼1, implying both that Γ sv ∼0 and chemical activity of protein at SL and LV surfaces was identical. These results are collectively interpreted to mean that water controls protein adsorption to hydrophobic surfaces and that the mechanism of protein adsorption can be understood from this perspective for a diverse set of proteins with very different composition.

Understanding Inflections and Steps in Carbon Dioxide Adsorption Isotherms in Metal-Organic Frameworks

2008 ◽  
Vol 130 (2) ◽  
pp. 406-407 ◽  
Author(s):  
Krista S. Walton ◽  
Andrew R. Millward ◽  
David Dubbeldam ◽  
Houston Frost ◽  
John J. Low ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Isotherms ◽  
Metal Organic Frameworks ◽  
Carbon Dioxide Adsorption ◽  
Metal Organic

scholarly journals Carbon Dioxide Separation from Nitrogen/Hydrogen Mixtures over Activated Carbon Beads: Adsorption Isotherms and Breakthrough Studies

2015 ◽  
Vol 29 (6) ◽  
pp. 3796-3807 ◽  
Author(s):  
Simon J. Caldwell ◽  
Bushra Al-Duri ◽  
Nannan Sun ◽  
Cheng-gong Sun ◽  
Colin E. Snape ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Adsorption Isotherms ◽  
Carbon Dioxide Separation ◽  
Hydrogen Mixtures
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