Iso-potential operando microwave cavity perturbation–spatial conductivity changes of a Cu/ZnO/Al₂O₃ catalyst inside a fixed-bed reactor during reverse watergas shift reaction

This work explores the combination of Microwave Cavity Perturbation (MCP) with the concept of Iso-Potential Operando Spectroscopy (IPOS) to develop IPO-MCP for measuring conductivity changes in a catalyst within a catalytic fixed-bed reactor (FBR). As proof-of-concept, spatially resolved dielectric properties, species, and temperature profiles were recorded during the reverse water–gas shift (rWGS) reaction on a commercial copper–zinc-alumina (CZA) catalyst. These results reveal a linear electronic structure–activity relationship along the catalyst packing demonstrating that hydrogen significantly enhances the Q-value compared to carbon dioxide in line with previous investigations. This research motivates further application of IPO-MCP to other catalytic systems with distinct conductivity changes.

DDC Class

541.3: Physical Chemistry

660: Chemistry; Chemical Engineering

Funding(s)

SFB 1615 - SMARTe Reaktoren für die Verfahrenstechnik der Zukunft

SFB 1615 - Teilprojekt B02: In situ Diagnose und Kontrolle der Elektrobenetzung von Kohlenstoffnanoröhrchen-Katalysatoren für die Anwendung in Mehrphasenreaktoren

Lizenz

https://creativecommons.org/licenses/by/4.0/

Publication version

publishedVersion

Name

iso-potential-operando-microwave-cavity-perturbation-spatial-conductivity-changes-of-a-cu-zno-al2o3-catalyst-inside-a.pdf

Type

Main Article

Size

4.02 MB

Format

Adobe PDF