Summary
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1.
Experiments on the hydrocracking of feedstocks containing 0.06, 0.01, and less than 0.01% nitrogen bifunctional catalyst have shown that nitrogen has a substantial effect on the activity and stability of a catalyst in the second stage of the process.
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2.
The deactivating effect of nitrogen when present to the extent of 0.01% and below in the feedstock can be eliminated by increasing the total pressure to 150 atm; the appropriate cycle duration is not less than 1400 h.
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3.
Two-stage hydrocracking enables gasoline with an octane number of about 76 and diesel fuel with a cetane number of 50–55 to be produced.
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Osipov, L.N., Agafonov, A.V., Khavkin, V.A. et al. Effect of nitrogen compounds on the hydrocracking of heavy distillates. Chem Technol Fuels Oils 1, 581–585 (1965). https://doi.org/10.1007/BF00730247
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DOI: https://doi.org/10.1007/BF00730247