Process Intensification in Nitric Acid Plants by Catalytic Oxidation of Nitric Oxide

Carlos A. Grande, Kari Anne Andreassen, Jasmina H. Cavka, David Waller, Odd Arne Lorentsen, Halvor Øien, Hans Jörg Zander, Stephen Poulston, Sonia García, Deena Modeshia

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We have evaluated the kinetics of the catalytic oxidation of NO to NO2 using a Pt/alumina catalyst, under conditions relevant to industrial nitric acid production: NO and steam contents up to 5% and 20%, respectively, with temperatures from 250 to 350 °C, and pressures up to 4.7 bar. The objective is to replace the current homogeneous oxidation process, which requires cooling of the process gas and a long residence time, with a more intensive heterogeneous oxidation process, allowing the heat of reaction (114 kJ/mol) to be recovered. This may give a 10% improvement in overall heat recovery and, additionally, lead to reduced capital expenditure (CAPEX) and footprint of new build plants. With world production of nitric acid of 60 million tonnes per annum, the transformation from the homogeneous oxidation of NO to a heterogeneous oxidation can lead to significant environmental benefits and cost reduction.
Original languageEnglish (US)
Pages (from-to)10180-10186
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number31
DOIs
StatePublished - Aug 8 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering

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