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|Title: ||Influence of thermal treatment conditions on porosity development and mechanical properties of activated carbon cloths from a novel nanofibre-made fabric|
|Authors: ||Ramos, ME|
Ribeiro Carrott, MML
|Issue Date: ||2009|
|Citation: ||Influence of thermal treatment conditions on porosity development and mechanical properties of activated carbon cloths from a novel nanofibre-made fabric, M.E. Ramos, P.R. Bonelli, A.L. Cukierman, M.M.L. Ribeiro Carrott & P.J.M. Carrott, Materials Chemistry & Physics 116 (2009) 310-314|
|Abstract: ||Activated carbon cloths (ACC)were prepared fromTencel®, a novel regenerated cellulose nanofibre fabric,
by phosphoric acid activation in an inert atmosphere using different thermal treatment conditions. The
effect of the final thermal treatment temperature (663–963 ◦C) and temperature programme (temperature
of isothermal step and heating rate) on yield, elemental composition, porosity development and
mechanical strength of the resulting ACC were examined. Nitrogen isotherms at −196 ◦C, carbon dioxide
isotherms at 0 ◦C, breaking loads and Youngs modulus values were determined for all the samples.
Adsorption data were fitted to different models (BET, Dubinin–Radushkevich, ˛S) to evaluate textural
parameters of the ACC. The samples were essentially microporous and presented good physical appearance.
Higher treatment temperatures resulted in higher BET surface areas and total pore volumes, also
leading to larger micropore widths. The ACC prepared at 963 ◦C showed maximum BET surface area
(1705m2 g−1) and total pore volume (0.67 cm3 g−1). On the other hand the best mechanical strength was
observed at 864 ◦C after a lower temperature isothermal step. Overall, the results indicated a stronger
dependence of surface area, total pore volume, microporosity development and mechanical strength on
the final treatment temperature than on the temperature programme.|
|Appears in Collections:||CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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