The preparation of nickel-aluminocalcium catalysts is accompanied by formation of various phases: calcium carbonate, a hydrated nickel-containing phase (evidently 4Ni (OH)2-NiO·OH), and calcium hydroaluminates with differing ratios between the CaO, A12O3, and H2O.
The curves plotting the amount of CaCO3 formed, the hydration activity, and the specific surface versus the catalyst composition have extremal characters.
The formation temperatures of NiO and Ni and the ratio between their contents depend on the heating medium.
The nickel-containing components of the catalyst do not combine into nickel-aluminum spinel at temperatures below 1000°.
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Boevskaya, E.A., Yakerson, V.I., Golosman, E.Z. et al. X-ray study of nickel-aluminocalcium catalysts. Russ Chem Bull 18, 2454–2456 (1969). https://doi.org/10.1007/BF00906538
- Specific Surface
- Calcium Carbonate