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N2O catalytic decomposition – From laboratory experiment to industry reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
55287 47046 2012 5 PDF Available
Title
N2O catalytic decomposition – From laboratory experiment to industry reactor
Abstract

Paper deals with design of pilot reactor for low temperature N2O decomposition in off-gases from HNO3 production. Pseudo-homogeneous one-dimensional model of an ideal plug flow reactor was used for modeling of N2O decomposition in a laboratory fixed bed reactor filled with grains or pellets of a Co–Mn–Al mixed oxide catalyst. Increase in inlet pressure up to 0.6 MPa did not influence the effective diffusion coefficient, but improved the achieved N2O conversion. Based on the laboratory data of N2O decomposition over Co–Mn–Al mixed oxide pellets, catalyst bed of 3400 kg was estimated for target 90% N2O conversion (30 000 m3 h−1 of exhaust gases from HNO3 plant containing 0.1 molar% N2O, 0.01 molar% NO, 0.01 molar% NO2, 3 molar% H2O, 5 molar% O2) at 420 °C and 600 kPa inlet pressure.

Graphical abstractCo–Mn–Al mixed oxide catalyst derived from layered double hydroxide was used to estimate the size of N2O decomposition reactor used for the exhaust gas purification in the nitric acid production unit.Figure optionsDownload full-size imageDownload high-quality image (170 K)Download as PowerPoint slideHighlights► N2O decomposition in simulated off-gas from HNO3 plant. ► Co–Mn–Al mixed oxide catalyst as grains or pellets. ► Pseudo-homogeneous one-dimensional model of N2O decomposition in fixed bed. ► Increase in inlet pressure up to 0.6 MPa improved the N2O conversion. ► Design of pilot reactor for N2O emissions abatement from HNO3 plant.

Keywords
N2O; Catalytic decomposition; Fixed bed reactor; Effectiveness factor; Mixed oxide catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 191, Issue 1, 15 September 2012, Pages 116–120
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us