Determination of Energy Characteristic and Microporous Volume by Immersion Calorimetry in Carbon Monoliths

Abstract

Activated carbon monoliths disc and honeycomb type were prepared by chemical activation of coconut shell with zinc chloride at different concentrations, without using a binder. The structures were characterized by N2adsorption at 77 K and immersion calorimetry into benzene. The experimental results showed that the activation with zinc chloride produces a wide microporous development, with micropore volume between 0,38 and 0,79 cm3g-1, apparent BET surface area between 725 and 1523 m2g-1and immersion enthalpy between 73,5 and 164,2 Jg-1. We compared the experimental enthalpy with calculated enthalpy by equation Stoeckli-Kraehenbuehl finding a data dispersion from which can infer that the structures are not purely microporous; this fact is ratified with similar behavior that the evidence t the product EoWo.

Fabrication and characterization porous carbon rod-shaped from almond natural fibers for environmental applications

“…The t-plot method was used to determine the external surface area and micropore volume in a relative pressure (P/P o ) >0.1. The Dubinin-Radushkevich (DR) method was considered to evaluate the micropore volume [19]. The micropore surface area could be calculated by the difference between the BET surface area and the external surface area.…”