Palladium nanoparticles decorated graphite nanoplatelets for room temperature carbon dioxide adsorption

2012 ◽  
Vol 187 ◽  
pp. 10-15 ◽  
Author(s):  
Ashish Kumar Mishra ◽  
Sundara Ramaprabhu
Keyword(s):  
Carbon Dioxide ◽  
Palladium Nanoparticles ◽  
Room Temperature ◽  
Carbon Dioxide Adsorption ◽  
Graphite Nanoplatelets

Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

2013 ◽  
Vol 395-396 ◽  
pp. 637-640
Author(s):  
Yi Yang ◽  
Zheng Ping Wang ◽  
Ling Meng ◽  
Lian Jun Wang
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Pore Structure ◽  
Carbon Capture ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

scholarly journals Drastic Enhancement of Carbon Dioxide Adsorption in Fluoroalkyl-Modified Poly(allylamine)

2021 ◽  
Author(s):  
Athanasios Koutsianos ◽  
Louise B. Hamdy ◽  
Chun-Jae Yoo ◽  
Jason J. Lee ◽  
Marco Taddei ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Bonding ◽  
Room Temperature ◽  
Polymer Chains ◽  
High Polymer ◽  
Carbon Dioxide Adsorption ◽  
Positron Annihilation Lifetime ◽  
Gas Streams ◽  
Amine Hydrogen ◽  
Amine Content

Polyamine-based carbon dioxide sorbents suffer from a seesaw relationship between amine content and amine efficiency. High polyamine loadings equate to increased amine contents, but often at the expense of amine efficiency. Carbon dioxide mass transport in compact polymers is severely limited, especially at ambient temperature. High polymer contents curtail diffusion pathways, hindering CO2 from reaching and reacting with the numerous amine functions. Here, we overcome this issue using poly(allylamine) (PAA) grafted with short fluoroalkyl chains and then cross-linked with C60. As experimentally evidenced by positron annihilation lifetime spectroscopy, the incorporation of fluoroalkyl chains generates free volume elements that act as additional diffusion pathways within the material. The inclusion of void volume in fluoroalkyl-functionalized PAA sorbents results in radically increased CO2 uptakes and amine efficiencies in diluted gas streams at room temperature, including simulated air. We speculate that the hydrophobic fluorinated functions interfere with the strong amine hydrogen bonding network disrupting and consequently altering the packing and conformation of the polymer chains. The evidence presented here is a blueprint for the development of more efficient amine-based CO2 sorbents

Tubular Titanates: Alkali-Metal Ion-Exchange Features and Carbon Dioxide Adsorption at Room Temperature

2019 ◽  
Vol 58 (13) ◽  
pp. 5168-5174 ◽  
Author(s):  
Eri Uematsu ◽  
Atsushi Itadani ◽  
Hideki Hashimoto ◽  
Kazuyoshi Uematsu ◽  
Kenji Toda ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ion Exchange ◽  
Alkali Metal ◽  
Metal Ion ◽  
Room Temperature ◽  
Carbon Dioxide Adsorption ◽  
Alkali Metal Ion ◽  
Metal Ion Exchange

scholarly journals Rearranged Copolyurea Networks for Selective Carbon Dioxide Adsorption at Room Temperature

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 4004
Author(s):  
Junsik Nam ◽  
Eunkyung Jeon ◽  
Su-Young Moon ◽  
Ji-Woong Park
Keyword(s):  
Carbon Dioxide ◽  
Chemical Structure ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Sol Gel ◽  
Hexamethylene Diisocyanate ◽  
Carbon Dioxide Adsorption ◽  
Bond Rearrangement ◽  
Polymerization Method ◽  
Adsorption Quantity

Copolyurea networks (co-UNs) were synthesized via crosslinking polymerization of a mixture of tetrakis(4-aminophenyl)methane (TAPM) and melamine with hexamethylene diisocyanate (HDI) using the organic sol-gel polymerization method. The subsequent thermal treatment of between 200 and 400 °C induced the sintering of the powdery polyurea networks to form porous frameworks via urea bond rearrangement and the removal of volatile hexamethylene moieties. Incorporating melamine into the networks resulted in a higher nitrogen content and micropore ratio, whereas the overall porosity decreased with the melamine composition. The rearranged network composed of the tetraamine/melamine units in an 80:20 ratio showed the highest carbon dioxide adsorption quantity at room temperature. The results show that optimizing the chemical structure and porosity of polyurea-based networks can lead to carbon dioxide adsorbents working at elevated temperatures.

scholarly journals Drastic Enhancement of Carbon Dioxide Adsorption in Fluoroalkyl-Modified Poly(allylamine)

2021 ◽  
Author(s):  
Athanasios Koutsianos ◽  
Louise B. Hamdy ◽  
Chun-Jae Yoo ◽  
Jason J. Lee ◽  
Marco Taddei ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Bonding ◽  
Room Temperature ◽  
Polymer Chains ◽  
High Polymer ◽  
Carbon Dioxide Adsorption ◽  
Positron Annihilation Lifetime ◽  
Gas Streams ◽  
Amine Hydrogen ◽  
Amine Content

Polyamine-based carbon dioxide sorbents suffer from a seesaw relationship between amine content and amine efficiency. High polyamine loadings equate to increased amine contents, but often at the expense of amine efficiency. Carbon dioxide mass transport in compact polymers is severely limited, especially at ambient temperature. High polymer contents curtail diffusion pathways, hindering CO2 from reaching and reacting with the numerous amine functions. Here, we overcome this issue using poly(allylamine) (PAA) grafted with short fluoroalkyl chains and then cross-linked with C60. As experimentally evidenced by positron annihilation lifetime spectroscopy, the incorporation of fluoroalkyl chains generates free volume elements that act as additional diffusion pathways within the material. The inclusion of void volume in fluoroalkyl-functionalized PAA sorbents results in radically increased CO2 uptakes and amine efficiencies in diluted gas streams at room temperature, including simulated air. We speculate that the hydrophobic fluorinated functions interfere with the strong amine hydrogen bonding network disrupting and consequently altering the packing and conformation of the polymer chains. The evidence presented here is a blueprint for the development of more efficient amine-based CO2 sorbents

Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers

2018 ◽  
Author(s):  
Jaya Prakash Madda ◽  
Pilli Govindaiah ◽  
Sushant Kumar Jena ◽  
Sabbhavat Krishna ◽  
Rupak Kishor
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Density Functional ◽  
Gas Adsorption ◽  
Ambient Pressure ◽  
Condensation Reaction ◽  
Intramolecular Interactions ◽  
Carbon Dioxide Adsorption ◽  
Nitrogen Gas ◽  
Adsorption Characteristic

<p>Covalent organic Imine polymers with intrinsic meso-porosity were synthesized by condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde. Even though these polymers were synthesized from precursors of bis-bis covalent link mode, the bulk materials were micrometer size particles with intrinsic mesoporous enables nitrogen as well as carbon dioxide adsorption in the void spaces. These polymers were showed stability up to 260<sup>o</sup> centigrade. Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed with type III adsorption characteristic nature. Carbon dioxide adsorption experiments reveal the possible terminal amine functional group to carbamate with CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Q<sub>st</sub>) than COP-1 and COP-2 at 273 K even though COP-3 had lower porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas adsorption capacities and Qst values as a consequence of the intra molecular interactions confirmed by Density Functional Theory computational experiments on small molecular fragments.</p>

scholarly journals Rice husk-based biochar for carbon dioxide adsorption in biogas

2020 ◽  
Vol 599 ◽  
pp. 012021
Author(s):  
A Pertiwiningrum ◽  
R N Besari ◽  
M A Wuri ◽  
A W Harto ◽  
N A Fitriyanto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Rice Husk ◽  
Carbon Dioxide Adsorption
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