Thermal conductivity measurement of activated carbon with granular graphite

Therefore the period of the adsorption/desorption cycle is longer, hence reducing the thermal efficiency of the heat pump/refrigeration system. In order to partially rectify this issue, activated carbon is often mixed expanded natural graphite (ENG) and compacted in order to enhance the thermal conductivity.

The disadvantage of this technique is the reduction of gas permeability through the mixture over pure granular activated carbon. In order to overcome this negative effect, the proposed work is to mix granular activated carbon (GAC/208C) with granular graphite (GG) and to evaluate both the thermal conductivity of the mixture and the contact heat transfer coefficient between the matrix and the container (stainless steel tube).