Journal of Chemical Engineering & Process Technology
Open Access

Pulse-response studies in heterogeneous catalysis: Theory and applications

3^rd International Conference on Chemical Engineering

October 02-04, 2017 Chicago, USA

Gregory Yablonsky and John T Gleaves

Saint Louis University, USA
Washington University in St. Louis, USA

Posters & Accepted Abstracts: J Chem Eng Process Technol

Abstract :

Non-steady-state kinetic screening of heterogeneous catalyst using pulse-response studies is based on the original technique of Temporal Analysis of Products (TAP) or â�?�?chemical calculusâ�?, which has become popular during the past two decades. Theory, methodology and application of this approach are explained using CO oxidation and hydrocarbon oxidation as examples. The main revolutionary idea of TAP is to treat the catalyst by a series of pulses of very small intensity relative to the amount of catalyst. The change of the catalyst composition caused by every pulse is insignificant. However, a precise mass-spectroscopic technique allows monitoring changes in the composition of the pulsed chemical mixture at the exit of the catalyst bed. Nowadays, no less than 15 groups in different parts of the world are using this technique. The theory of different TAP-modifications is presented, in particular the theory of the thin-zone TAP-reactor which gives a possibility to reveal detailed mechanisms of complex catalytic reactions.