P-04 Precipitation of cobalt molybdates on activated carbons for catalytic applications

Topic: Advances in solid state materials synthesis, new solids and compounds

M. Zgrzebnicki^1*, A. Albrecht², A. Jurkowski², P. Adamski²

¹ Engineering of Catalytic and Sorbent Materials Department, West Pomeranian University of Technology in Szczecin, Pulaskiego street 10, 70-322 Szczecin;

² Department of Inorganic Chemical Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pulaskiego street 10, 70-322 Szczecin

^* E-mail: michal.zgrzebnicki@zut.edu.pl

Keywords: activated carbon, catalytic applications, cobalt, molybdenum

Abstract: In order to meet economical requirements for industrial processes, transition metals nitrides are being investigated as a new generation of catalysts. Their purpose is to replace expensive noble metals [1]. Typical industrial processes, which could use nitrides, are hydrotreatment reactions, oxidation and ammonia synthesis. The latter one, currently based on the Haber-Bosch process, uses a Fe-based catalyst and requires pressures near 200 bar and temperatures above 673 K. Nowadays, it is responsible for approximately 2% of global energy demand. Therefore, new catalysts are required to optimise this technology. Cobalt molybdenum nitrides are possible catalysts to reduce energy consumption by NH₃ synthesis [2]. This research presents a preparation procedure for cobalt molybdate supported on activated carbon, which could be transformed into a nitride form.

Following materials were used: Co(NO₃)₂·6H₂O, (NH₄)₆Mo₇O₂₄·4H₂O and activated carbon (AC) Organosorb 10CO as a support. According to the previous study [3], AC was washed with water to remove soluble inorganic compounds. The final precipitation step was performed in the presence of supporting material. Samples with different ratios of cobalt and molybdenum compounds to AC were prepared.

Materials were analysed with the XRD technique, which confirmed successful precipitation of the cobalt molybdate phase on the AC, thus sufficient dispersion of a precursor is possible to obtain via the presented method.

 References

1. Dongil, A.B. (2019) Recent Progress on Transition Metal Nitrides Nanoparticles as Heterogenous Catalysts. Nanomaterials, 9, 1111-1129.
2. Adamski, P. et al. (2019) Thermal stability of catalyst for ammonia synthesis based on cobalt molybdenum nitrides. Chemical Papers, 73, 851-859.
3. Gęsikiewicz-Puchalska, A. et al. (2017), Improvement of CO₂ uptake of activated carbons by treatment with mineral acids. Chemical Engineering Journal, 309, 159-171.

Acknowledgements

The scientific work was financed by The Polish National Centre for Research and Development, grant „Lider”, project No. LIDER/10/0039/L-10/18/NCBR/2019.