A Fast Approach for Preparation of Adsorbent from Reed Black Liquor and Its Performance in Equilibrium and Kinetic Gas Separation

摘要

A new approach using reed pulping black liquor by hydrothermal reaction followed by fast carbonization at 350 degrees C in fluidized bed reactor for 5 minutes was proposed in this paper. The BET specific surface area generated at optimum conditions reached 390 m(2) g(-1). The CO2 selectivity over CH4 and N-2 comparable to commercial activated carbons was obtained. The isosteric enthalpies of adsorption for CO2, CH4 and N-2 on the resultant carbon sample prepared at optimum conditions show surface heterogeneity. The kinetic results indicate its potential for separation of carbon dioxide from carbon dioxide/methane mixture.