Explore BrainMass

Chemical Engineering

Chemical engineering is a branch of engineering that applies the physical sciences and/or life sciences together with mathematics and economics to processes that convert raw materials or chemicals into more useful or valuable forms. Chemical engineers are also concerned with pioneering valuable materials and related techniques, which re often essential to related fields such as nanotechnology, fuel cells and biomedical engineering.

Within chemical engineering there are two broad subgroups. The first includes design, manufactures and operation of plants and machinery in industrial chemical and related processes. The second has to do with the development of new or adapted substances for products ranging from foods and beverages to cosmetics to cleaners and pharmaceutical ingredients.

Chemical engineers develop economic ways of using materials and energy as opposed to chemists who are more interested in the basic composition of materials and synthesizing products. Chemical engineers use chemistry and engineering to turn raw materials into useable product, such as medicine, petrochemicals and plastics. The applied and research facets make extensive use of computers.

Categories within Chemical Engineering

Composition of Streams Connected to a Flash Vaporization Unit

A feed stream to a flash vaporization (FV) unit contains water (30%, mole) and acetone. The feed flow rate is 1000 mole/min. The mixture is sent to a continuous flash vaporization unit at atmospheric pressure where 50% of the solution leaves the unit as vapor. The liquid stream from the flash vaporization unit is sent to a secon

Surface Tension of Mercury and Water in Glass

Water rises to a height of 5 cm in a certain glass capillary tube. In the same tube the level of mercury surface is depressed by 1.54cm. Compare the surface tensions of water and mercury. Specific weight of Mercury is 13.6 x10^3 Kg/m^3 and that of water is 10^3 Kg/m^3. Angle of contact of glass with mercury and water is 130 degr

Window Thickness To Maintain Safe Heat Level

A new oven has been designed which has self-cleaning capability. The oven window must be from two transparent high temperature polymers (A and B) with thermal conductivities of K_A=0.15 W/mK and K_B=0.08 W/mK. Thickness of layer Ais twice as much as layer B. During the self-cleaning the oven wall and the air temperature are 400C

Combined heat loss through conduction and convection

Super heated steam at 500K flows through a steel pipe (outside dia. Of 15cm and a wall thickness of 0.7cm, k=54 W/mK). The pipe is insulated with a 5.3cm thick layer of an insulation (k=0.073 W/mK). The outer layer of insulation is at 27C. The sum of radiation and convective heat transfer coefficient is estimated to be 8 W/mK. C

Numerical Methods Differential Equations

On the first test we looked at a cooling tank for a radioisotope test facility. From Geometry and calculus we can determine that the relationship between the volume of the heavy water (m^3) and the height of the water (m) in the storage tank is given by the following equation: V = pi . h^2 . ((3R - h) / 3) - equation 3 Add

Pump Problem: Flow Rate and Elevation Calculation

Ethylbenzene at 40 degrees C is delivered by a pump from a storage tank to a reactor elevated 3.5 m above the pump. The pressure at the inlet to the reactor is 1.5 barg. There is a control valve in the line, with a pressure drop of 0.75 bar across it. the flowrate of ethylbenzene is 8 L/s. What is the maximum flowrate possibl

Finding the Differential Reading Height

See attached file for full problem description. A U-tube mercury manometer is connected to a closed pressurized tank as illustrated in the Figure below. If the air pressure is 2 psia, determine the differential reading (height) h. The specific weight of the air is negligible. Assume fluids are at room temperature.

Job Analysis of a Chemical Engineer

Develop documentation for human resources professionals to manage a specific employment position. The materials you create would assist human resources professionals to choose, train, and develop successful employees toward helping the company meet its goals. - Reference at least one human resources journal and at least one

Chemical Engineering Review Questions

65) A 40,000 lb rocket is launched from sea level straight up, then falls back to earth. The total flight time was 160 seconds. The rocket reached its apex in 1 minute and 20 seconds. What altitude did the rocket reach before falling back to earth? A) More than 25 miles. B) Between 15 and 25 miles. C) Less than 5 miles. D) N

Pump behavior analysis

A 150mm model pump rotating at 1750 rpm has the following characteristic... A geometrically similar 200 pump having a similar efficiency curve is used to pump water through... Also answer this question after you solve the attachment question. If the size of the pump were 275 mm , then what would its maximum efficiency b

Lowest standard deviation of measurements

As the Quality Control Manager of a chemical company, you are asked to decide between several process methods that are supposed to uniformly mix 37.4 milligrams into a chemical solution. The resulting solutions from each process are sample tested for uniformity. The test samples yielded the following results of percentage powder

Mass of Compound Needed to Prepare 1 oz of a 10% Solution

Hydroquinone, USP 1,4-Benzenediol; 1,4-Dihydroxybenzene C6H6O2 F.W. 110.11 CAS 123-31-9 Chemical Specifications: Assay (C6H6O2) 99.0-100.5% Melting Range 172°-174°C MAXIMUM LIMITS Residue on Ignition 0.5% Water 0.5% Organic Volatile Impurities To pass test Shipping Informatio

Biomedical Engineering - Tibia Stretcher

An adjustable device is designed to apply a traction to stretch the tibia. It is attached to the tibia by rigid pins as illustrated below. There is a mechanism for length adjustable in the centre of the vertical section. Draw a free-body diagram for each of the three straight sections of the device, showing the forces and bendin

Defluorination & adhesion properties

Using ion bombardment-If Teflon is defluorinated to increase it's adhesion properties, then what would the changes in surface characteristics be? I'm trying to use this information so that I can decide what techniques I'd use to analyze the surface to see if the method worked. So basically, I don't understand what removing flour

Chemical Equilibria: Feed Composition and Molar Ratios

See the attached file. "Synthesis gas" may be produced by the catalytic reforming of methane with steam: CH4(g) + H2O(g) ?> CO(g) + 3H2(g) The only other reaction considered is: CO(g) + H2O(g) ?> CO2(g) + H2(g). Assume equilibrium is attained for both reactions at I bar and 1300 K. (1) Would it he better to carry out