Adsorption interaction of water with microporous adsorbents. Part 2.—Enthalpy of immersion and thermal-desorption studies

Abstract

The net integral molar enthalpy of immersion, in water and CCl₄, of activated carbon cloth exhibits a maximum value with increasing air or nitric acid activation. The effect is ascribed to the occurrence of optimum pore dimensions. Molecular-sieve and specific-interaction phenomenon complicate the interpretation of the data but a separation of the pore dimension effect can be achieved. Programmed thermal-desorption studies on molecular sieve are used to demonstrate kinetic effects which arise from similar aperture or pore-opening influences.