Effect of a Barium Promoter on the Stability and Activity of Carbon-Supported Cobalt Catalysts for Ammonia Synthesis.

Tarka, Aleksandra; Zybert, Magdalena; Truszkiewicz, Elżbieta; Mierzwa, Bogusław; Kępiński, Leszek; Moszyński, Dariusz; Raróg‐Pilecka, Wioletta

Samples of barium-promoted carbon-supported cobalt catalysts for ammonia synthesis were prepared; the cobalt content was constant (27.4 wt %) and the amount of barium introduced differed within the range of 0-0.88 mmol gC+Co−1. Turbostratic carbon was used as the support. Several techniques, including X-ray powder diffraction, TEM, Thermogravimetric analysis-mass spectrometry (methanation studies) and H2 temperature-programmed desorption were used to examine the properties of the carbon support or catalytic materials. The reaction rate measurements were performed under the following conditions: T=400 °C, p=9.0 MPa, x

COBALT catalysts; AMMONIA synthesis; CARBON; BARIUM; CHEMICAL stability; THERMOGRAVIMETRY; X-ray powder diffraction

ChemCatChem, 2015, Vol 7, Issue 18, p2836

1867-3880

Academic Journal

10.1002/cctc.201500309