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Apparatus for steady‐state kinetic measurements of the catalytic reduction of nitric oxide by ammonia on iron oxide
Author(s) -
Claußen Michael,
Kainer Hartmut,
Kunz Ulrich,
Hoffmann Ulrich
Publication year - 1991
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270140106
Subject(s) - chemistry , ammonia , continuous stirred tank reactor , flue gas , catalysis , selective catalytic reduction , oxygen , steady state (chemistry) , inorganic chemistry , oxide , gas analyzer , analytical chemistry (journal) , volumetric flow rate , thermodynamics , chromatography , environmental chemistry , organic chemistry , physics
Abstract The reduction of nitric oxide with ammonia on an unsupported iron oxide catalyst has been studied in a continuous‐flow recycle reactor using simulated flue gas. The responses of the employed reactor system to step and pulse inputs of tracer indicate that the system could be regarded as a continuous stirred tank reactor (CSTR). Preliminary tests were carried out to determine the effect of temperature and particle size on the measured reaction rates. Additional experiments were performed in order to study the influence of oxygen and water concentration on these rates. A gas chromatographic system has been developed to analyze the gas components NO, N 2 O, NO 2 , NH 3 , H 2 O, O 2 , CO 2 and N 2 . In addition, the concentrations of NO and NO 2 were measured with a nondisperse infrared (NDUV/NDIR) analyzer.