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Energies 2017, 10(4), 542; doi:10.3390/en10040542

Dependence of the Microporosity of Activated Carbons on the Lignocellulosic Composition of the Precursors

1
Department of Applied Physics, University of Extremadura (UEX), Avda. Elvas s/n, 06071 Badajoz, Spain
2
Department of Mechanical, Energetic and Materials Engineering, University of Extremadura (UEX), Avda. Elvas s/n, 06071 Badajoz, Spain
3
National Centre for Engineering in Agriculture, University of Southern Queensland (UQ), Brisbane, QLD 4350, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Paul L. Chen
Received: 12 January 2017 / Revised: 7 April 2017 / Accepted: 14 April 2017 / Published: 15 April 2017
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Abstract

A series of activated carbons were prepared by physical steam gasification under identical experimental conditions to compare the pore development from almond tree pruning chars and walnut shell activated carbons. The results obtained showed that steam gasification yields microporous carbons in both cases, and the rise in temperature causes an increase of the pore volumes of the activated carbons, up to a certain degree of burn-off. This effect was more marked for walnut shell, which gave rise to activated carbons with apparent surface values of up to 1434 m2 g−1. Also, a slight widening of porosity was found at low burn-off degrees. This pore widening was more marked in the case of activated carbons from almond tree pruning, which also have a high macropore volume. It was found that the lignocellulosic and porosity properties of the raw materials can cause this different behavior towards activation processes. View Full-Text
Keywords: activated carbon; biomass; lignocellulosic composition activated carbon; biomass; lignocellulosic composition
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Román, S.; Ledesma, B.; Álvarez-Murillo, A.; Al-Kassir, A.; Yusaf, T. Dependence of the Microporosity of Activated Carbons on the Lignocellulosic Composition of the Precursors. Energies 2017, 10, 542.

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