Improved Start-Up for the Ammonia Oxidation Reaction: Electrical Heating Device for Platinum-Rhodium Gauze Catalysts and new Procedure Reduces Explosive Hazards and Platinum Losses at Start-Up

By V. I. Chernyshev; S. V. Zjuzin

doi:10.1595/003214001X4512230

ISSN: 0032-1400

oa Improved Start-Up for the Ammonia Oxidation Reaction

Electrical Heating Device for Platinum-Rhodium Gauze Catalysts and new Procedure Reduces Explosive Hazards and Platinum Losses at Start-Up
By By V. I. Chernyshev and S. V. Zjuzin
Source: Platinum Metals Review, Volume 45, Issue 1, Jan 2001, p. 22 - 30
DOI: https://doi.org/10.1595/003214001X4512230
- Published online: 01 Jan 2001

Abstract

The start-up operation in a nitric acid plant is one of the most important stages, from the viewpoint of safety and platinum loss, in the entire ammonia oxidation process. Usually, flame burners using hydrogen or hydrogen-containing gas preheat the platinum alloy gauze catalyst to the operating temperature. However, there are disadvantages and peculiarities in this method of initiating the start-up reaction. These are discussed here and a new electrical heating device and a new technique are described for preheating the platinum alloy gauze catalyst. The device and technique are free of these disadvantages, and together they reduce the explosive hazard and platinum losses during start-up. Results from their commercial utilisation over a 12-year period at various nitric acid plants are described.

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2001-01-01

2024-12-21

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/content/journals/10.1595/003214001X4512230

Improved Start-Up for the Ammonia Oxidation Reaction

Platinum Metals Review 45, 22 (2001); https://doi.org/10.1595/003214001X4512230

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Article Type: Research Article

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oa Improved Start-Up for the Ammonia Oxidation Reaction

Electrical Heating Device for Platinum-Rhodium Gauze Catalysts and new Procedure Reduces Explosive Hazards and Platinum Losses at Start-Up

Abstract

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