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Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts, Part 2: Effect of the Reaction Conditions and the Physicochemical State of a Catalyst on the Yield of Products

  • CATALYSIS IN CHEMICAL AND PETROCHEMICAL INDUSTRY
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Abstract

The selectivity toward products is studied for the industrially important process of NO hydrogenation in a H2SO4 solution as a function of process parameters: the hourly space velocity of the NO + H2 gas mixture through the reactor, the speed of stirring and the concentration of the Pt catalyst/graphite suspension, and the temperature. It is found that the first or zero order with respect to the catalyst can be observed for this process in the regime of external diffusion limitation for the gas reagents, depending on the concentration of the catalyst in the suspension, and the selectivity toward solid products (hydroxylamine sulfate (HAS) and ammonium sulfate) is greatest in the region of transition. It is shown that the selectivity towards HAS can be improved by functionalizing graphite surface with nitrogen-containing groups that modify the adsorption and catalytic properties of supported platinum nanoparticles. Some views are presented on specific features of the functioning of platinum catalysts in concentrated suspensions with a limited supply of the reaction gases.

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Funding

This work was performed as part of a State Task for the Boreskov Institute of Catalysis.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    A. N. Bobrovskaya, P. A. Simonov, R. I. Kvon, A. V. Bukhtiyarov & A. V. Romanenko

  2. Novosibirsk State University, 630090, Novosibirsk, Russia

    P. A. Simonov & A. V. Bukhtiyarov

Authors
  1. A. N. Bobrovskaya
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  2. P. A. Simonov
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  3. R. I. Kvon
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  4. A. V. Bukhtiyarov
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  5. A. V. Romanenko
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Corresponding authors

Correspondence to A. N. Bobrovskaya, P. A. Simonov, R. I. Kvon, A. V. Bukhtiyarov or A. V. Romanenko.

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Translated by E. Glushachenkova

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Bobrovskaya, A.N., Simonov, P.A., Kvon, R.I. et al. Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts, Part 2: Effect of the Reaction Conditions and the Physicochemical State of a Catalyst on the Yield of Products. Catal. Ind. 12, 16–28 (2020). https://doi.org/10.1134/S2070050420010031

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  • DOI: https://doi.org/10.1134/S2070050420010031

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