Remote sensing of the flux responses of a gas–solid catalytic micro-reactor

Flux response technology applied in zero length column diffusivity measurements

“…The purpose of this paper is to measure propane diffusivity in the washcoat of monolith samples using Flux Response Technology (FRT) and to show that this method can be used to compare and contrast with other micro and macroporous techniques in one experiment by analysing the adsorption and desorption transients in the FRT profile. In previous studies (Buffham et al 2000;Richardson et al 2004;Palmer et al 2011), we have shown the versatility of the FRT method in measuring adsorption, reaction and desorption in situ in the reactor. By applying the Zero Length Column (ZLC) method to analyse the sorption curves generated by the FRT system, the rate of diffusion in the washcoat is calculated.…”

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

“…In previous studies, the versatility of the FRT method in measuring adsorption, reaction and desorption in situ in the reactor has been reported (Buffham et al, 2000;Palmer et al, 2011;Richardson et al, 2004). By applying the Zero Length Column (ZLC) method to analyse the desorption curves generated by the FRT system, the correct representation of the rate of diffusion within the washcoat is calculated.…”

“…The purpose of this paper is to measure the intraphase diffusivity in the washcoat of monolith samples and obtain the upper and lower limits of effective diffusivity of the monoliths using Temporal Analysis of Products (TAP) (Gleaves et al, 1988), to determine the lower limit of effective diffusivity, and Flux Response Technology (FRT) (Buffham et al, 2000), to obtain the upper limit of effective diffusivity.…”

In situ measurement of gas adsorption processes using Flux Response Technology

“…Flux response technology (FRT) is a powerful gas in situ perturbation technique that can be used to measure minuscule changes in flowrate between two gas streams for potentially any gaseous process involving a change in volume (dV /dt) (Buffham et al 1986(Buffham et al , 2000Russell et al 2003). FRT functions analogous to an electrical Wheatstone bridge assembly whereby gas molecules represent electrons and flow capillaries represent resistors.…”