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Adsorption Capacity, Towards Carbon Dioxide, of a Chemically Activated Coal

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Causes, Impacts and Solutions to Global Warming

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Abstract

The chemical activation of a low-rank coal by alkaline hydroxides and carbonates, successively, carries the formation of activated carbons characterized by a very developed porous texture and highly microporous. Indeed, the microporous volume can reach the value of 0.63 cm3 g−1 and the pore size distribution, deduced from the technique of immersionnal calorimetry into liquids of increasing molecular dimensions, shows that the average diameter of these pores is of the order of 0.7 nm. This distribution is perfectly suitable to the adsorption of the carbon dioxide at room temperature so that the adsorption capacities, at this temperature, of the prepared activated charcoals towards this greenhouse gas are very important (0.68 g/g, i.e., 0.68 ton/ton). Otherwise, the obtained results show that the alkaline hydroxides are more effective than the corresponding carbonates.

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Abbreviations

CO:

Carbon monoxide

CO2 :

Carbon dioxide

c:

Constant

E0 :

Characteristic energy, J/mol

GHG:

Greenhouse gas

HCl:

Hydrochloric acid

hi :

Specific enthalpy of immersion, mJ/m2

K2CO3 :

Potassium carbonate

KOH:

Potassium hydroxide

Lm:

Minimal width of the pore, nm

Me:

Low-rank coal

N2 :

Nitrogen gas

ppm:

Parts per million

\({\mathrm{ S}}_{{\mathrm{ CO}}_2} \) :

Dubinin and Radushkevich (DR) apparent specific area, m2/g

Se:

External surface, m2/g

\( {\mathrm{ S}}_{{\mathrm{ N}}_2} \) :

Brunauer, Emmett, and Teller (BET) specific area, m2/g

Tc:

Critical temperature, °C

TPD:

Temperature-programmed desorption

Vm:

Molar volume, cm3/mol

W(L):

Micropore volume filled, cm3/g

W0 :

Total micropore volume, cm3/g

α:

Thermal expansion coefficient, K−1

β:

Affinity coefficient

-ΔH:

Enthalpy of immersion, J/g

ϕ:

Pore diameter, nm

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Authors and Affiliations

  1. Faculté de Chimie, USTHB, BP 32, El-Alia, 16111 Bab-Ezzouar, Alger, Algérie

    Abdelhamid Addoun & Aissa Khelifi

  2. Faculté des Sciences, Université de Chlef, Chlef, 02000, Algérie

    Larbi Temdrara

Authors
  1. Abdelhamid Addoun
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  2. Larbi Temdrara
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  3. Aissa Khelifi
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Correspondence to Abdelhamid Addoun .

Editor information

Editors and Affiliations

  1. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, Ontario, Canada

    Ibrahim Dincer

  2. Makina Muhendisligi Bolumu, Dokuz Eylul University, Buca, Izmir, Turkey

    Can Ozgur Colpan

  3. Faculty of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey

    Fethi Kadioglu

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Addoun, A., Temdrara, L., Khelifi, A. (2013). Adsorption Capacity, Towards Carbon Dioxide, of a Chemically Activated Coal. In: Dincer, I., Colpan, C., Kadioglu, F. (eds) Causes, Impacts and Solutions to Global Warming. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7588-0_54

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  • DOI: https://doi.org/10.1007/978-1-4614-7588-0_54

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