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Croatica Chemica Acta, Vol. 88 No. 4, 2015.

Original scientific paper

https://doi.org/10.5562/cca2789

Synthesis of Improved Catalytic Materials for High-Temperature Water-gas Shift Reaction

Zara P. Cherkezova-Zheleva orcid id orcid.org/0000-0002-9287-3217 ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bldg. 11, Sofia 1113, Bulgaria
Katerina L. Zaharieva ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bldg. 11, Sofia 1113, Bulgaria
Ivan B. Ivanov ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bldg. 11, Sofia 1113, Bulgaria
Vasko D. Idakiev ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bldg. 11, Sofia 1113, Bulgaria
Ivan G. Mitov ; Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bldg. 11, Sofia 1113, Bulgaria

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Abstract

In this investigation, we report the preparation and characterization of Co-, Cu- and Mn-substituted iron oxide catalytic materials supported on activated carbon. Co-precipitation method and low temperature treatment were used for their synthesis. The influence of chemical composition, stoichiometry, particle size and dispersity on their catalytic activity was studied. Samples were characterized in all stages of their co-precipitation, heating and spend samples after catalytic tests. The obtained results from room and low temperature Mössbauer spectroscopy were combined with analysis of powder X-ray diffraction patterns (XRD). They revealed the preparation of nano-sized iron oxide materials supported on activated carbon. Relaxation phenomena were registered also for the supported phases. The catalytic performance in the water-gas shift reaction was studied. The activity order was as follows: Cu0.5Fe2.5O4 > Co0.5Fe2.5O4 > Mn0.5Fe2.5O4. Catalytic tests demonstrated very promising results and potential application of studied samples due to their cost-effective composition.

Keywords

nano-sized substituted magnetites; activated carbon; water-gas shift reaction

Hrčak ID:

154304

URI

https://hrcak.srce.hr/154304

Publication date:

31.12.2015.

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