Determination of faujasite-type zeolite thermal conductivity from measurements on porous composites by laser flash method

An approach of determining thermal conductivity of zeolite is introduced, due to the lack of its thermal properties data for heat transfer calculations in adsorption and catalytic applications. Faujasite (FAU) as one of the important zeolites, whose framework consists of sodalite cages with pores formed by 12-membered rings, was chosen as model zeolite. Pellet-shaped samples made of FAU-type zeolite and binder pseudoboehmite were prepared with different binder fractions and porosities. Apparent thermal conductivity was determined using laser flash method. Results showed that the use of pseudoboehmite increased material's heat capacity, thermal diffusivity and conductivity, and the apparent thermal conductivity of porous composites decreased with porosity. The thermal conductivity of FAU-type zeolite at 20 degrees C and 1 atm. was found to be 0.10 W/(m.K) by extrapolating measurement results. (C) 2018 Elsevier B.V. All rights reserved.