An experimental study of nonisothermal effectiveness factors in a porous catalyst

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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.