Engineering, 09.10.2019 23:00 cschellfamily
The irreversible first-order (wrt partial pressure of a) gas-phase reaction a → b is carried out isothermally in a "fluidized" catalytic cstr containing 50 kg of catalyst. currently, 50% conversion is realized for pure a entering at a pressure of 20 atm. there is virtually no pressure drop in the cstr. it is proposed to put a pbr containing the same catalyst weight in series with the cstr. the pressure drop parameter for the pbr, α, given by equation (5-29) is α = 0.018 kg–1. the particle size is 0.2 mm, the bed porosity is 40%, and the viscosity is the same as that of air at 200°c. (a) should the pbr be placed upstream or downstream of the cstr in order to achieve the highest conversion? explain qualitatively using concepts you learn
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Burgers vector is generally parallel to the dislocation line. a)-true b)-false
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Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
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Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.
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The irreversible first-order (wrt partial pressure of a) gas-phase reaction a → b is carried out iso...
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