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A platinum catalytic reactor in an automobile is used to convert carbon monoxide to carbon dioxide in an oxidation reaction of the form 2CO + O2 l 2CO2. Species transfer between the catalytic surface and the exhaust gases may be assumed to occur by diffusion in a film of thickness L = 10 mm.
Consider an exhaust gas that has a pressure of 1.2 bars, a temperature of 500°C, and a CO mole fraction of 0.0012. If the reaction rate constant of the catalyst is k1" = 0.005 m/s and the diffusion coefficient of CO in the mixture is 10-4 m2/s, what is the molar concentration of CO at the catalytic surface? What is the rate of removal of CO per unit area of the catalyst? What is the removal rate if k1" is adjusted to render the process diffusion limited?
air enters a compressor at 300 k and 100 kpa at a volumetric flow rate of 4 m3s. the air is compressed such that the
you have tested bearings for a particular machine. this resulted in a mean of 40570000 cycles with a standard deviation
Calculate limits of tolerance and allowance for a 25mm shaft and hole pair designated H8/d9
1. what are the primary components of an airplane and their purposes?2. what are the primary control surfaces of an
A horizontal flat plate is in a free stream of air at T_{\infty } = 290K and u_{\infty } = 0.05m/s. The flat plate’s length (in the direction of the free-stream velocity) is L = 2m, its width is w = 0.5m and its temperature is T = 310K. Find the tota..
Determine the diameter of a suitable air main for the distribution - Table of equivalent pipe lengths for valves and fittings as used on air distribution systems
1. It has been suggested that the control software for a radiation therapy machine, used to treat patients with cancer, should be implemented using N-version programming. Comment on whether or not you think this is a good suggestion.
How does the National Society of Professional Engineers Code of Ethics promote safety, health and welfare to the public? (2 - 3 paragraphs)
A piston/cylinder has nitrogen gas at 750 K and 1500 kPa. Now it is expanded in a polytropic process with n = 1.2 to P = 750 kPa. Find the final temperature, the specific work and specific heat transfer in the process.
methane at 77 f 1 atm enters an insulated reactor operating at steady state and burns with the theoretical amount of
a two-dimensional jet in the form of a liquid sheet is turned through an angle of 30 degrees by a curved vane. derive
you borrow 10000 from a bank at annual rate of 10 compounded monthly which needs to be repaid in 36 equal monthly
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