scholarly journals Oxovanadium(v)-catalyzed amination of carbon dioxide under ambient pressure for the synthesis of ureas

RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27121-27125
Author(s):  
Toshiyuki Moriuchi ◽  
Takashi Sakuramoto ◽  
Takanari Matsutani ◽  
Ryota Kawai ◽  
Yosuke Donaka ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Building Block ◽  
Ambient Pressure ◽  
Catalytic Activation

Catalytic activation of carbon dioxide as a C1 building block under ambient pressure was performed by using a commercially available oxovanadium(v) catalyst for the synthesis of ureas.

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>

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.

Carbon dioxide reduction on Ir(111): stable hydrocarbon surface species at near-ambient pressure

2016 ◽  
Vol 18 (9) ◽  
pp. 6763-6772 ◽  
Author(s):  
Manuel Corva ◽  
Zhijing Feng ◽  
Carlo Dri ◽  
Federico Salvador ◽  
Paolo Bertoch ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ambient Pressure ◽  
Carbon Dioxide Reduction ◽  
Hydrogenation Reaction ◽  
Surface Species ◽  
Carbon Dioxide Hydrogenation

Stable hydrocarbon surface species in the carbon dioxide hydrogenation reaction were identified on Ir(111) under near-ambient pressure conditions.

Carbon dioxide adsorption and activation on gallium phosphide surface monitored by ambient pressure x-ray photoelectron spectroscopy

2021 ◽  
Vol 54 (23) ◽  
pp. 234002
Author(s):  
Yifan Ye ◽  
Hongyang Su ◽  
Kyung-Jae Lee ◽  
David Larson ◽  
Carlos Valero-Vidal ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Photoelectron Spectroscopy ◽  
Gallium Phosphide ◽  
Ambient Pressure ◽  
Carbon Dioxide Adsorption ◽  
X Ray

scholarly journals Synthesis of Oxazolidinones by using Carbon Dioxide as a C 1 Building Block and an Aluminium‐Based Catalyst

ChemSusChem ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 3296-3303 ◽  
Author(s):  
Mani Sengoden ◽  
Michael North ◽  
Adrian C. Whitwood
Keyword(s):  
Carbon Dioxide ◽  
Building Block

High conversion of CO2 into cyclic carbonates under solvent free and ambient pressure conditions by a Fe-cyanide complex

2019 ◽  
Vol 43 (44) ◽  
pp. 17211-17219 ◽  
Author(s):  
Pengbo Jiang ◽  
Lei Ma ◽  
Kaizhi Wang ◽  
Kai Lan ◽  
Zhenzhen Zhan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ambient Pressure ◽  
Solvent Free ◽  
High Conversion ◽  
Cyanide Complex ◽  
Cyclic Carbonates ◽  
Great Demand

Methods of converting carbon dioxide into valuable chemicals are of great demand but their development is still challenging.

scholarly journals Cu(I)/Ionic Liquids Promote the Conversion of Carbon Dioxide into Oxazolidinones at Room Temperature

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1241 ◽  
Author(s):  
Jikuan Qiu ◽  
Yue Zhao ◽  
Yuling Zhao ◽  
Huiyong Wang ◽  
Zhiyong Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Noble Metal ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Sustainable Chemistry ◽  
One Pot ◽  
Propargylic Alcohols ◽  
Noble Metal Catalysts ◽  
Three Component Reaction ◽  
Carbon Dioxide Co2

Recently, the efficient chemical fixation of carbon dioxide (CO2) into high value chemicals without using noble metal catalysts has become extremely appealing from the viewpoint of sustainable chemistry. In this work, a one-pot three component reaction of propargylic alcohols, anines and CO2 that can proceed in an atom economy and environmentally benign manner by combination of CuI and tetrabutylphosphonium imidazol ([P4444][Im]) as a catalyst was described. Catalysis studies indicate that this catalytic system is an effective catalyst for the conversion of CO2 into oxazolidinones at room temperature and ambient pressure without any solvent. The results provide a useful way to design novel noble metal-free catalyst systems for the transformation of CO2 into other valuable compounds.

The concentration and pressure dependent diffusion of carbon dioxide in nitrile rubbers

1992 ◽  
Vol 339 (1655) ◽  
pp. 497-519 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Coefficient ◽  
High Pressures ◽  
Ambient Pressure ◽  
Weight Fraction ◽  
Gas Pressure ◽  
Time Dependent ◽  
Initial Increase ◽  
Parametric Function ◽  
Ambient Gas

The paper reports the results of an experimental and associated analytical study of the time dependent adsorption of carbon dioxide gas into two nitrile elastomers. The mass gas sorption has been measured using a device based on a vibrating reed to a weight fraction accuracy of ca . 0.05 % at 47 °C in the ambient gas pressure range 0.1-34 MPa. The experimental method is described and data are provided. These data are used to compute the most effective description of the diffusion process by invoking a number of different diffusion coefficient, D(θ), characteristics, where θ denotes lapsed time, ambient pressure and local ambient gas concentration within the elastomers. The numerical procedures adopted to perform the fitting of the experimental data with various D(θ) characteristics are described and the quality of the fit is assessed. The D(θ) characteristics chosen have no particular physical basis but follow established empirical precedents. The characteristics of the parameters associated with the various D(θ) functions generally indicate that as the gas is embibed with progressively increasing ambient pressures the diffusion coefficient increases. At high pressures the diffusion is arrested and the coefficient decreases. We have associated the initial increase with gas induced plasticization and the eventual decreases with the effect of the hydrostatic component of the ambient gas pressure. The parameter fitting also indicates that the diffusion is arrested with lapsed time which is tentatively associated with time dependent volumetric relaxations. These interpretations apart, the data and analyses clearly indicate that the transport is not simply fickian and a relatively complex parametric function to describe the sensitivity of the diffusion coefficient to time, concentration and pressure is necessary for these systems.

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