Results
Title

On the Effect of Flash Calcination Method on the Characteristics of Cobalt Catalysts for Ammonia Synthesis Process.

Authors

Patkowski, Wojciech; Kowalik, Paweł; Antoniak‐Jurak, Katarzyna; Zybert, Magdalena; Ronduda, Hubert; Mierzwa, Bogusław; Próchniak, Wiesław; Raróg‐Pilecka, Wioletta

Abstract

The influence of precursor calcination method on the properties of the cerium and barium promoted cobalt catalysts for ammonia synthesis was investigated. Three methods of cobalt‐cerium hydroxycarbonates mixture heat treatment were studied – flash, static and semi‐static calcination processes, differing in duration as well as heat and mass transfer conditions. Their effect on catalyst structural parameters, morphology, crystal structure and activity was determined. It was proven that compared to other heat treatment methods flash calcination of CoCe hydroxycarbonate precursor resulted with a catalyst of superior structural parameters and the highest activity in ammonia synthesis. However, the incomplete precursor transformation and insufficient active and promoter phases crystallization during this process were indicated. In order to improve surface activity and optimise properties of the catalyst it was stated that modification of flash calcination conditions is required.

Subjects

CATALYST synthesis; COBALT catalysts; AMMONIA; HEAT treatment; MASS transfer; HEAT transfer; CRYSTAL structure; BARIUM zirconate

Publication

European Journal of Inorganic Chemistry, 2021, Vol 2021, Issue 15, p1518

ISSN

1434-1948

Publication type

Academic Journal

DOI

10.1002/ejic.202100117