High Temperature Sorption Measurements for Determining Surface Effects of Solid Fuels

Abstract

A novel measuring system for temperatures up to 1300°C and pressures up to 3MPa is presented here that allows for the first time gravimetrically measured high temperature sorption equilibrium data which are independent of the measuring system. For the sorption kinetics it is essential that the measuring conditions are close to the later application, particularly for high temperature sorption measurements this claim could not be fulfilled for most technical applications in the past. The advantage of the measuring method presented here is that solid bed samples in high temperature gravimetry can be measured under flow-through conditions in both directions. The first application of this apparatus is within the German Research Association (DFG) funded collaboration project “Oxyflame” of the Universities of Aachen, Bochum and Darmstadt. Here exzesssorptive adsorption kinetics, equilibrium loadings and heats of adsorption for several gas-carbon-systems will be determined with the presented measuring device. First measurements presented here proof the functioning principle of the new system, additional data of the ongoing experiments are presented on ICAE2014.