C−C Bond Formation of Mg‐ and Zn‐Activated Carbon Dioxide

2018 ◽  
Vol 24 (18) ◽  
pp. 4710-4717 ◽  
Author(s):  
Glenn B. S. Miller ◽  
Einar Uggerud
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Bond Formation

Carbon Dioxide-Mediated C(sp2)–H Arylation of Primary and Secondary Benzylamines

2018 ◽  
Author(s):  
Mohit Kapoor ◽  
Pratibha Chand-Thakuri ◽  
Michael Young
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Bond Activation ◽  
Bond Formation ◽  
Carbon Bond ◽  
Chelate Effect ◽  
Free Amine ◽  
Carbon Carbon Bond ◽  
New Strategy ◽  
Metal Catalyzed

Carbon-carbon bond formation by transition metal-catalyzed C–H activation has become an important strategy to fabricate new bonds in a rapid fashion. Despite the pharmacological importance of <i>ortho</i>-arylbenzylamines, however, effective <i>ortho</i>-C–C bond formation from C–H bond activation of free primary and secondary benzylamines using Pd<sup>II</sup> remains an outstanding challenge. Presented herein is a new strategy for constructing <i>ortho</i>-arylated primary and secondary benzylamines mediated by carbon dioxide (CO<sub>2</sub>). The use of CO<sub>2</sub> is critical to allowing this transformation to proceed under milder conditions than previously reported, and that are necessary to furnish free amine products that can be directly used or elaborated without the need for deprotection. In cases where diarylation is possible, a chelate effect is demonstrated to facilitate selective monoarylation.

Modification of Activated Carbon from Biomass Nypa and Amine Functional Groups as Carbon Dioxide Adsorbent

2017 ◽  
Vol 28 (Suppl. 1) ◽  
pp. 227-240 ◽  
Author(s):  
Nur 'Izzati A. Ghani ◽  
◽  
Nur Yusra Mt Yusuf ◽  
Wan Nor Roslam Wan Isahak ◽  
Mohd Shahbuddin Masdar ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Functional Groups

Porous properties of activated carbon produced from Eucalyptus and Wattle wood by carbon dioxide activation

2006 ◽  
Vol 23 (6) ◽  
pp. 1046-1054 ◽  
Author(s):  
Yuvarat Ngernyen ◽  
Chaiyot Tangsathitkulchai ◽  
Malee Tangsathitkulchai
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Porous Properties ◽  
Carbon Dioxide Activation

scholarly journals Surface-modified spherical activated carbon materials for pre-combustion carbon dioxide capture

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33681-33690 ◽  
Author(s):  
Nannan Sun ◽  
Chenggong Sun ◽  
Jingjing Liu ◽  
Hao Liu ◽  
Colin E. Snape ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Carbon Dioxide Capture ◽  
Spherical Activated Carbon ◽  
Surface Modified

Carbon beads exhibiting potential in practical pre-combustion CO2 capture were prepared.

ADSORPTION AND DESORPTION OFM-XYLENE FROM SUPERCRITICAL CARBON DIOXIDE ON ACTIVATED CARBON

2001 ◽  
Vol 36 (10) ◽  
pp. 2197-2211 ◽  
Author(s):  
Jamal Benkhedda ◽  
Jean-Noël Jaubert ◽  
Danielle Barth ◽  
Carsten Zetzl ◽  
Gerd Brunner
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Supercritical Carbon Dioxide ◽  
Adsorption And Desorption ◽  
Supercritical Carbon

scholarly journals Gas phase synthesis of dimethyl carbonate from CO2 and CH3OH over Cu-Ni/AC. A kinetic study

2019 ◽  
pp. 88-99 ◽  
Author(s):  
Oscar Felipe Arbeláez-Pérez ◽  
Sara Dominguez Cardozo ◽  
Andrés Felipe Orrego-Romero ◽  
Aida Luz Villa Holguin ◽  
Felipe Bustamante Londoño
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Activated Carbon ◽  
Gas Phase ◽  
Dimethyl Carbonate ◽  
Direct Synthesis ◽  
Dispersion Analysis ◽  
Molar Ratio ◽  
Rate Determining Step ◽  
Carbonate Formation

The catalytic activity for dimethyl carbonate formation from carbon dioxide and methanol over mono and bimetallic Cu:Ni supported on activated carbon is presented. Bimetallic catalysts exhibit higher catalytic activity than the monometallic samples, being Cu:Ni-2:1 (molar ratio) the best catalyst; X-Ray diffraction, transmission electron microscopy, and metal dispersion analysis provided insight into the improved activity. In situ FT-IR experiments were conducted to investigate the mechanism of formation of dimethyl carbonate from methanol and carbon dioxide over Cu-Ni:2-1. The kinetics of the direct synthesis of dimethyl carbonate in gas phase over Cu:Ni-2:1 supported on activated carbon catalyst was experimentally investigated at 12 bar and temperatures between 90 oC and 130 oC, varying the partial pressures of CO2 and methanol. Experimental kinetic data were consistent with a Langmuir–Hinshelwood model that included carbon dioxide and methanol adsorption on catalyst actives sites (Cu, Ni and Cu-Ni), and the reaction of adsorbed CO2 with methoxi species as the rate determining step. The estimated apparent activation energy was 94.2 kJ mol-1.

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