Enhancement Mechanism of the CO2 Adsorption–Desorption Efficiency of Silica-Supported Tetraethylenepentamine by Chemical Modification of Amino Groups

2019 ◽  
Vol 7 (10) ◽  
pp. 9574-9581 ◽  
Author(s):  
Hidetaka Yamada ◽  
Firoz A. Chowdhury ◽  
Junpei Fujiki ◽  
Katsunori Yogo
Keyword(s):  
Chemical Modification ◽  
Co2 Adsorption ◽  
Amino Groups ◽  
Enhancement Mechanism ◽  
Desorption Efficiency ◽  
Adsorption Desorption

scholarly journals Influence of the Presence of Different Alkali Cations and the Amount of Fe(CN)6 Vacancies on CO2 Adsorption on Copper Hexacyanoferrates

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3371 ◽  
Author(s):  
Svensson ◽  
Grins ◽  
Eklöf ◽  
Eriksson ◽  
Wardecki ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Prussian Blue ◽  
Co2 Adsorption ◽  
X Ray Diffraction ◽  
Alkali Cations ◽  
Prussian Blue Analogue ◽  
X Ray ◽  
Infra Red ◽  
Adsorption Desorption ◽  
Adsorption Capability

The CO2 adsorption on various Prussian blue analogue hexacyanoferrates was evaluated by thermogravimetric analysis. Compositions of prepared phases were verified by energy-dispersive X-ray spectroscopy, infra-red spectroscopy and powder X-ray diffraction. The influence of different alkali cations in the cubic Fm3m structures was investigated for nominal compositions A2/3Cu[Fe(CN)6]2/3 with A = vacant, Li, Na, K, Rb, Cs. The Rb and Cs compounds show the highest CO2 adsorption per unit cell, 3.3 molecules of CO2 at 20 C and 1 bar, while in terms of mmol/g the Na compound exhibits the highest adsorption capability, 3.8 mmol/g at 20 C and 1 bar. The fastest adsorption/desorption is exhibited by the A-cation free compound and the Li compound. The influence of the amount of Fe(CN)6 vacancies were assessed by determining the CO2 adsorption capabilities of Cu[Fe(CN)6]1/2 (Fm3m symmetry, nominally 50% vacancies), KCu[Fe(CN)6]3/4 (Fm3m symmetry, nominally 25% vacancies), and CsCu[Fe(CN)6] (I-4m2 symmetry, nominally 0% vacancies). Higher adsorption was, as expected, shown on compounds with higher vacancy concentrations.

Chemical modification of activated carbon monoliths for CO2 adsorption

2013 ◽  
Vol 114 (3) ◽  
pp. 1039-1047 ◽  
Author(s):  
D. P. Vargas ◽  
L. Giraldo ◽  
A. Erto ◽  
J. C. Moreno-Piraján
Keyword(s):  
Activated Carbon ◽  
Chemical Modification ◽  
Co2 Adsorption ◽  
Activated Carbon Monoliths

Physico-chemical modification of natural mordenite-clinoptilolite zeolites and their enhanced CO2 adsorption capacity

2020 ◽  
Vol 294 ◽  
pp. 109871 ◽  
Author(s):  
Satriyo Krido Wahono ◽  
Joseph Stalin ◽  
Jonas Addai-Mensah ◽  
William Skinner ◽  
Ajayan Vinu ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Physico Chemical ◽  
Co2 Adsorption Capacity

scholarly journals Chemical modification of the adeno-associated virus capsid to improve gene delivery

2020 ◽  
Vol 11 (4) ◽  
pp. 1122-1131 ◽  
Author(s):  
Mathieu Mével ◽  
Mohammed Bouzelha ◽  
Aurélien Leray ◽  
Simon Pacouret ◽  
Mickael Guilbaud ◽  
...  
Keyword(s):  
Gene Delivery ◽  
Chemical Modification ◽  
Neutralizing Antibodies ◽  
Cell Tropism ◽  
Amino Groups ◽  
Chemical Modifications ◽  
Virus Capsid ◽  
Adeno Associated Virus

Bioconjugated AAV vectors, achieved by coupling of ligands on amino groups of the capsid, are of great interest for gene delivery. Chemical modifications can be used to enhance cell tropism and to decrease interactions with neutralizing antibodies.

scholarly journals CO2 Adsorption–Desorption Kinetics from the Plane Sheet of Hard Coal and Associated Shrinkage of the Material

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 4013 ◽  
Author(s):  
Norbert Skoczylas ◽  
Anna Pajdak ◽  
Mariusz Młynarczuk
Keyword(s):  
Mathematical Model ◽  
Co2 Adsorption ◽  
Effective Diffusion ◽  
Hard Coal ◽  
Desorption Kinetics ◽  
Size Change ◽  
Co2 Desorption ◽  
Plane Sheet ◽  
Adsorption Desorption ◽  
Kinetics Of

The paper presents the results of studies on sorption and CO2 desorptions from coals from two Polish mines that differed in petrographic and structural properties. The tests were carried out on spherical and plane sheet samples. On the basis of the sorption tests, the effective diffusion coefficient was calculated on the plane sheet samples based on a proper model. Similar tests were performed on the spherical samples. Mathematical model results for plane sheet samples were compared with the most frequently chosen model for spherical samples. The kinetics of CO2 desorption from plane sheet samples were compared with the kinetics of sample shrinkage. In both samples, the shrinkage was about 0.35%. The size change kinetics and CO2 desorption kinetics significantly differed between the samples. In both samples, the determined shrinkage kinetics was clearly faster than CO2 kinetics.

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