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An experimental study of nonisothermal effectiveness factors in a porous catalyst
Author(s) -
Miller F. W.,
Deans H. A.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130111
Subject(s) - catalysis , isothermal process , activation energy , thermocouple , hydrogen , porosity , oxygen , chemistry , thermodynamics , cylinder , atmospheric pressure , atmospheric temperature range , analytical chemistry (journal) , chemical engineering , materials science , composite material , chromatography , organic chemistry , mechanical engineering , meteorology , physics , engineering
Abstract Circulating hydrogen‐oxygen mixtures were reacted at atmospheric pressure in a single long porous catalyst cylinder which contained a thermocouple‐micromanometer probe. Rate and temperature rise data were obtained at 20°, 30°, 50°, and 60°C. in the concentration range 0 to 5% oxygen in hydrogen. The data were used in connection with the transport equations to obtain effectiveness factors, rate constant, activation energy, and reaction order for oxygen concentration. The necessity of considering thermal effects is exhibited clearly by this system. The maximum temperature rise observed inside the catalyst (33°C.) is associated with a 60% increase in utilization factor over the isothermal value.