Questions and Answers of Fundamentals Of Momentum Heat

Natural gas from a hydraulic fracturing process contains hydrogen sulfide (H2S) gas that will be removed by absorption into a specialty solvent through an interphase mass transfer process. In the
Pipes often contain solid residue that adheres to the inner wall of the pipe. If these pipes are not properly cleaned before use, then the flow of water through the pipe will slowly dissolve the
The photocatalytic tubular reactor shown in the figure (next page) is used to decompose organic contaminants in liquid waste water. The inter walls of the 1.5 cm inner diameter glass tube are lined
In a wastewater treatment process, we are concerned about the possible release of the aromatic hydrocarbon benzene to the atmosphere. In the present process, 3.0 gmole/m3 of benzene (solute A, mol.
As society searches for technical solutions to global warming, vast ponds of photosynthetic algae are seen as one possible solution for the removal of CO2 from combustion of fossil fuels. Consider
The well-mixed bubbler tank shown in the figure below is used to prepare carbonated water needed for the production of soft drinks. The tank volume is 2.0 m3, and the tank diameter is 1.0 m. The
Consider the remediation trench shown in the figure below, a simple process to treat contaminated wastewater before discharge to a lake or river. The remediation trench consists of a narrow outdoor
An open pond containing 200 m3 of wastewater is contaminated with a small concentration of trichloroethylene (TCE), a common industrial solvent. The pond is 2.0 meters deep and 10 meters on a side.
The convective mass-transfer device shown in the figure (right column) is used to generate a gas stream containing a mixture of phosphorous oxychloride (POCl3) vapor diluted in inert helium (He) gas.
Consider the novel device for oxidative treatment of wastewater shown in the figure (right column). In this device, O3 will serve as the oxidant source, which must be carefully dosed into the liquid.
Wilke and Hougan studied the mass-transfer characteristics of packed beds containing granular solids. In their experimental investigations, hot air was blown through a packed bed of porous celite
Tetraethoxysilane, also called TEOS or Si(OC2H5)4, is a liquid chemical used in the semiconductor industry to produce thin films of silicon dioxide by chemical vapor deposition (CVD). In order to
A process is being developed to produce carbonated beverages. As part of this process, a wetted-wall absorption column 2.0 m long will be used to dissolve carbon dioxide (CO2) gas into water. The
The “soil venting” shown in the figure (next page) is used to treat soil contaminated with volatile, toxic liquids. In the present situation, the porous soil particles are saturated with liquid
A “rotating disk” shown in the figure (at right) is used to plate a thin film of copper onto a silicon wafer by an electroless plating process at 25 C. The disk is 8.0 cm in diameter and rotates
A process is being developed to produce carbonated beverages. As part of this process, a packed-bed absorption tower will be used to dissolve carbon dioxide, CO2, gas into water. Pure mountain spring
A “bubbleless” shell-and-tube membrane aeration system is used to transfer oxygen gas (O2) to liquid water. Water containing no dissolved oxygen is added to the tube side at the entrance at a
Consider the concentric tubular mass transfer device shown in the figure below. This device is designed to gradually introduce hydrogen (H2) gas (species A) into a pure oxygen gas (O2) inlet stream
A counter-current packed tower will be used to remove H2S vapor from a N2-rich gas stream. In the present process, the inlet gas stream entering the bottom of the tower contains 5.0 mole% H2S at a
A countercurrent gas absorption tower packed with 1.5 in ceramic Intalox saddles is used to process 360 kgmole/h of an inlet gas stream containing 10 mole% sulfur dioxide (SO2) in nitrogen (N2) gas.
Develop a model equation, in final, integrated algebraic form, to determine the total transfer rate of ethylene WA, units mole A/time, product of flux and surface area) into the cylindrical catalyst
Rework Problem 20.36 for a staggered arrangement.Data From Problem 20.36A tube bank employs an in-line arrangement with ST = SL = 3.2 cm and tubes that are 1.8 cm in outside diameter. There are 10
The molecular diffusion coefficient of methanol dissolved in liquid water as the solvent is 1.28 X 10-5 cm2/s at 15 C and 1.0 atm total system pressure. What is the molecular diffusion
Consider that a binary mixture of 5.0 mole% ethanol vapor in 95 mole% carbon dioxide carrier gas is diffusing through a randomly porous adsorbent material with void fraction of 0.50. The system
A pipeline containing natural gas from a hydraulic fracturing process contains 80% methane gas (CH4, species A) and 20% ethane (C2H6, species B) gas at 3.0 atm and 17 C, as shown in figure below. We
Consider a system for mass transfer of a binary mixture of species A and B within the control volume shown in the figure below. The concentration at the surface (cAs) is constant, the process is very
The elements arsenic and phosphorus are common dopants in crystalline silicon that impart semiconductor properties to it via the introduction of p-type carriers into the silicon lattice. The doping
Consider the cylindrical porous pellet shown in the figure below. A gas mixture of species A and B continually flows over the top face of the pellet. The sides and bottom of the pellet are sealed,
Consider the hollow cylinder for drug delivery release shown in the figure below. The hollow center contains a lump of solid solute A (drug) in a liquid. Solute A dissolves in the liquid to a maximum
As part of a process to fabricate materials with ordered pore arrays, the diffusion-limited solvent etching process shown in the figure (next column) is used to remove a contaminant (solid solute A,
Consider the simplified process shown in the figure below, which is designed to treat a gas-phase mixture of trichloroethylene (TCE) in air by degrading the TCE within a porous catalyst layer of 0.50
The immobilized enzyme layer shown in the figure below is designed to convert substrate A to product B according to the simplified reaction A → B with simplified rate equation RA = –kcA. In
A gas mixture of constant composition 5.0 mole% CO2 and 95 mole% air flows around a porous, spherical particle of diameter 3.0 cm that initially only contains only air (no CO2) within the gas space
It is desired to diffuse a blue dye molecule (solute A) into a solid material (species B) near the surface of the material, as shown in the figure below. Initially, there is no dye in the solid (cAo
A new type of porous material serves as food packaging film, as shown in the figure below. The film rests on a nonporous metal plate. The packaging film is 0.20 cm thick (2.0 mm). The food contains
A spherical time-release capsule was developed to release pesticide to surrounding soil, as shown in the figure below. The capsule is 1.0 cm in diameter, and is made of a polymer containing a uniform
Air rapidly flows over a 10.0 m x 8.0 m rectangular spill of gasoline (n-octane) at a velocity of 8.0 m/s. The spill occurred within an enclosure where the gas temperature was maintained at 27 C. You
Using the results of Problem 1.7, show that der / dθ = eθ and deθ /dθ = – er.Data From Problem 1.7Show that the unit vectors er and eθ in a cylindrical coordinate system are related to
Referring to the figure below, assume the flow to be frictionless in the siphon. Find the rate of discharge in cubic feet per second, and the pressure head at B if the pipe has a uniform diameter of
Show that equation (16-10) reduces to the form V kVT+q+A=p Du D(gy) ·+p- ·+v・pg +v•µV²v Dt Dt
Derive equation (2-3) from equation (9-27). VP = p(g-a)
A copper cylinder with a diameter of 3 in is initially at a uniform temperature of 70 F. How long after being placed in a medium at 1000 F with an associated convective heat-transfer coefficient of 4
A thin slab of material is subjected to microwave radiation that causes volumetric heating to vary according towhere qo has a constant value of 180 kW/m3 and the slab thickness, L, is 0.06 m. The