handbook of chemical and environmental engineering calculations

[...]... following inlet loading and outlet loading of an air pollution particulate control unit, determine the collection efficiency of the unit Inlet loading = 2 gr/ft3 Outlet loading = 0.1 gr/ft3 Solution Collection efficiency is a measure of the degree of performance of a control device; it specifically refers to the degree of removal of a pollutant and may be calculated through the application of the conservation... requires that a packed column and a spray tower be used in series for the removal of HCl from the flue gas The spray tower is to operate at an efficiency of 65% and the packed column at an efficiency of 98% Calculate the mass flowrate of HCl leaving the spray tower, the mass flowrate of HCl entering the packed tower, and the overall efficiency of the removal system if 76.0 Ib of HCl enters the system every... \ijp with units of length /time Finally, note that the above physical properties are strong functions of the temperature but weak functions of the pressure Interestingly, the viscosity of a gas increases with increasing temperature, while the viscosity of a liquid decreases with an increase in temperature UAD.6 MOLAR RELATIONSHIPS A mixture contains 20 Ib of O 2 , 2 Ib of SO2, and 3 Ib of SO3 Determine... whose quantity is not changed by chemical reaction and for any chemical element whether or not it has participated in a chemical reaction It may be written for one piece of equipment, around several pieces of equipment, or around an entire process It may be used to calculate an unknown quantity directly, to check the validity of experimental data, or to express one or more of the independent relationships... Ib of SO3 Determine the weight fraction and mole fraction of each component Copyright © 2002 John Wiley & Sons Retrieved from: www.knovel.com Solution By definition: Co py rig hte dM ate ria l Weight fraction = weight of A /total weight Moles of A = weight of ,4/molecular weight of A Mole fraction = moles of ,4/total moles First, calculate the weight fraction of each component: Compound Weight (Ib)... rate of 10,000 lb/h in the presence of 20,000 lb/h of air Due to the energy requirements of the unit, 1250 lb/h of a vapor conditioning agent is added to assist the treatment of the stream Determine the rate of product gases exiting the unit in pounds per hour (lb/h) Assume steady-state conditions Solution The conservation law for mass can be applied to any process or system The general form of this... generated Apply the conservation law for mass to the control device on a rate basis: Rate of mass in — Rate of mass out + Rate of mass generated = Rate of mass accumulated Rewrite this equation subject to the conditions in the problem statement: Rate of mass in = Rate of mass out or ™in = ™out Note that mass is not generated and steady conditions (no accumulation) apply Refer to the problem statement for the... liquid column of mercury is 2.493 ft Assume the density of mercury is 848.7 lb/ft3 and atmospheric pressure is 2116 lbf/ft2 absolute Calculate the gauge pressure in lbf/ft2 and the absolute pressure in lbf/ft2, psia, mm Hg, and in H2O Solution Expressed in various units, the standard atmosphere is equal to: Copyright © 2002 John Wiley & Sons Retrieved from: www.knovel.com Atmospheres (atm) Feet of water... that absolute and gauge pressures are usually expressed with units of atm, psi, or mm Hg This statement also applies to partial pressures One of the most common units employed to describe pressure drop is inches of H 2 O, with the notation in H2O or IWC (inches of water column) UAD.5 ENGINEERING CONVERSION FACTORS Given the following data for liquid methanol, determine its density in lb/ft3 and convert... gravity = fc J Density — — Density of water at 4° C : Note that the density of water at 4°C is 62.4 lb/ft3 in English engineering units or 1.0g/cm3 Copyright © 2002 John Wiley & Sons Retrieved from: www.knovel.com Calculate the density of methanol in English units by multiplying the specific gravity by the density of water Density of methanol = (Specific gravity)(Density of water) Co py rig hte dM ate . development of material concerned with both chemical and environmental engineering calculations. The resulting end product is the Handbook of Chemical and Environmental Engineering Calculations. As. and environmental engineering. This Handbook provides the reader with nearly 600 solved problems in the chemical and environmental engineering fields. Of the eight parts, two are concerned with chemical engineering. question of what to include and what to omit has been particularly difficult. However, the problems and solutions in the Handbook attempt to address calculations common to both chemical and environmental