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

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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Carbon Dioxide Adsorption Using Activated Carbon via Chemical Vapor Deposition Process

Engineering Journal ◽

10.4186/ej.2016.20.4.59 ◽

2016 ◽

Vol 20 (4) ◽

pp. 59-68 ◽

Cited By ~ 3

Author(s):

Rewadee Anuwattana ◽

Chaiwat Patkool ◽

Petchporn Chawakitchareon

Keyword(s):

Carbon Dioxide ◽

Activated Carbon ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Chemical Vapor ◽

Deposition Process ◽

Chemical Vapor Deposition Process ◽

Carbon Dioxide Adsorption ◽

Vapor Deposition Process

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Effects of ozonation and temperature on biodegradation of natural organic matter in biological granular activated carbon filters

Drinking Water Engineering and Science Discussions ◽

10.5194/dwesd-3-107-2010 ◽

2010 ◽

Vol 3 (1) ◽

pp. 107-132 ◽

Cited By ~ 2

Author(s):

L. T. J. van der Aa ◽

L. C. Rietveld ◽

J. C. van Dijk

Keyword(s):

Carbon Dioxide ◽

Organic Matter ◽

Activated Carbon ◽

Organic Carbon ◽

Natural Organic Matter ◽

Granular Activated Carbon ◽

Carbon Dioxide Production ◽

Oxygen Removal ◽

Theoretical Maximum ◽

Increasing Temperature

Abstract. Four pilot (biological) granular activated carbon ((B)GAC) filters were operated to quantify the effects of ozonation and water temperature on the biodegradation of natural organic matter (NOM) in (B)GAC filters. Removal of dissolved organic carbon (DOC), assimilable organic carbon (AOC) and oxygen and the production of carbon dioxide were taken as indicators for NOM biodegradation. Ozonation stimulated DOC and AOC removal in the BGAC filters, but had no significant effect on oxygen removal and carbon dioxide production. The temperature had no significant effect on DOC and AOC removal, while oxygen removal and carbon dioxide production increased with increasing temperature. Multivariate linear regression was used to quantify these relations. In summer the ratio between oxygen consumption and DOC removal exceeded the theoretical maximum of 2.5 g O2·g C−1 and the ratio between carbon dioxide production and DOC removal exceeded the theoretical maximum of 3.7 g CO2·g C−1. Bioregeneration of large NOM molecules could explain this excesses and the non-correlation between DOC and AOC removal and oxygen removal and carbon dioxide production. However bioregeneration of large NOM molecules was considered not likely to happen, due to sequestration.

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