Ultimate Engineering Study Guide - Questions & Answers
A force vector is positioned in the 6th octant. The projection angle is 37 degrees. The planar angle referenced from the negative x-axis is 53 degrees. The x,y, and z components will be+,-,--,+,+-,-,--,+,--The magnitude of the vector is 10 N. The z component is6 N- 6 N8 N- 8 N
A packed absorption tower is to be used to remove SO 2 from a stack gas consisting of a mixture of SO 2 and air. The flow rate and SO 2 content of the gas mixture measured just before the packed tower are 25 m 3/min and 5.0 percent by volume, respectively. The working pressure is 1 atm and the temperature of the packed tower is 25C. Removal of 90 percent of the SO 2 is required, and water, initially pure with respect to SO 2, is to be used as the liquid solvent. The equilibrium line for SO 2 and water can be estimated by y=30x. Determine the flow rate of water that represents 150 percent of the minimum liquid requirement, type and size of packing, pressure drop, column diameter, and height of packing. Guess the cost of the packed tower. By plotting, show briefly the possible auxiliary units of this SO 2 removal unit. (Hint: x and y are mole fractions of SO 2 in liquid and gas phases, respectively and you can assume the overall gas phase mass transfer coefficient to be 2.010 4 kmol/5.m 2.atm.)