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Chemical Engineering
Chemical Engineering is the branch of engineering that deals with the technology of large-scale chemical production and the manufacture of products through chemical processes. Today, the field of chemical engineering is a diverse one, covering areas from biotechnology and nanotechnology to mineral processing.
1,464 Questions
What are the factors that limit solar heat transfer?
3. It depends upon the position (Latitude, Longitude and Hemisperical Presence) and also altitude.
Castrol is a British brand of industrial and automotive lubricants. The name came after the addition of castor oil to the lubricant formula.
Molecular weight (unit) of salt dissolved in liter (unit) volume of water.
What is the opposite of lubricant?
Glue is the functional opposite of 'lubricant'. A lubricant reduces friction between two surfaces while a glue increases the adherence between two substances.
What is the gas used for hot oil blanket?
Gas blankets over vessels containing hot oil can be either fuel gas or nitrogen blanketed. The blankets should always be vented to flare to reduce discharging hydrocarbons to the atmosphere. Fuel gas cannot be vented to the atmosphere; therefore, nitrogen blanketing is used for large atmospheric pressure storage tanks.
For reference: Refinery "fuel gas" is the gaseous product produced when crude oil is refined. It varies in composition from refinery to refinery and may consist of methane, ethane, propane, butane, or any C1-C4 molecule.
Are alkenes present in crude oil?
Yes, but often not in significant quantities. Alkenes are generally producted by "cracking" or breaking apart larger alkane molecules in the presence of a catalyst such as zeolite, to form alkenes and alkanes. This mixture is then separated by fractional distillation is a distillation column. They can also be produced by catalytic dehydrogenation.
What are the pros and cons of petroleum?
Petroleum is good, as it can be cracked and polymerised into other use full chemicals, it is bad because drilling from the ground is expensive
How to convert saybolt seconds furol to cst?
Kinematic viscosity can be converted from SSU to Centistokes like
νCentistokes = 0.226 νSSU - 195 /νSSU
where
νSSU < 100
νCentistokes = 0.220 νSSU - 135 /νSSU
where
νSSU > 100
Gasoline is primarily produced from crude oil.
Crude oil is a mixture of hydrocarbons with different molecular weights, formulae, boiling points, contaminants and other physical constants. Gasoline is a hydrocarbon mixture with a much more limited range of these components which is formulated to burn in internal combustion engines.
The Process:
Incoming crude is cleaned up by removing water and solids.
Initially the gasoline sized molecules re removed from the crude oil by distillation. This is a small portion of the crude.
The molecules too small to be gasoline are recovered and reformed to make bigger molecules. This reformate is redistilled to recover more gasoline sized molecules. Lighter molecules are added to the crude light ends going to the reformer for another trip through.
Heavy molecules from the crude and heavy molecules from the reformer are set to a "Cracker" to be broken up into smaller molecules. This cracked oil is distilled. Gasoline sized molecules are recovered, light ends are reformed and heavy ends are re-cracked.
The collected gasolines is purified to remove sulphur and other contaminants, adjusted with other thypes of hydrocarbon molecules to produce a clean burning fuel. Additive packages are mixed in (anti-knock compounds, detergents, antioxidants etc.)
What is the difference between dry and wet corrosion?
dry corrosion is taken place in the presence of gases whereas wet corrosion takes place in the presence of moisture in air
Simple experiment to compare steel and cast iron?
A steel specimen would give a longer or continuous sound when beaten by a hammer. This is due to the malleable nature of the material. In other words, sound takes longer to travel in a coarse-grained material.
Whereas cast iron specimen gives sound of shorter duration. This is due to the brittle nature of the material. In other words, sound takes shorter to travel in a fine-grained material.
What is the henrys law constant at 60 degrees Celsius and -10 degrees Celsius?
The amount of any given gas that will dissolve in a liquid at a given temperature is directly proportional to the partial pressure of that gas.
What is the temperature of dry saturated steam at 510psig?
It will vary slightly with changes in atmospheric pressure, but is approximately 472ºF.
Why FeSO4 is used for coagulation?
Iron sulfate help the coprecipitation of other metallic ions from water as hydroxides..
Saponification is the process that makes what common product?
Saponification is a process that makes soap. It usually involves mixing a strong base with a triglyceride such as fat or oil. The lye soap that was used by many people in frontier areas was made by mixing ashes from burned wood with tallow; the ash provided the lye (sodium hydroxide), the tallow provided the fat.
I've no idea but asphalt can be ruined by poor spelling.
A basket that strains waste water from going down a waste line
It's possible to use the UNIQUAC fluid package.
What does ethylene do to the solution in a vehicles radiator?
Ethylene glycol mixed up to 50% with water, lowers the freezing point of the mixture, while remaining an excellent heat transfer medium. It protects the engine from either freezing or from overheating.
Name 5 sources of heat energy?
Fossil fuels - coal, oil, natural gas. Biomass (including wood and charcoal). Nuclear power. Solar power. Geothermal power(volcanosVolcanoes, hot springs and geysers are sources of geothermal energy - energy from the interior of the earth. The thermal energy from these events can produce hot water or steam, which can be then piped to a power plant at the surface. This can be used to run turbines which produce electrical energy. HRD (hot, dry rock) can be used as another technique to generate thermal energy. (Water is pumped into cracks in the earth's crust. It returns to the surface as steam, which can be used to generate electricity).
Hydroxide (OH-) it is not a combustible gas but a negatively charged ion. These ions do not exist as gaseous product. They are usual found in conjunction with other positively charged ions (H+ or Na+) and can be found in water due to dissociation.
What means k-factor in crude oil quality?
K Factor determines the type of crude whether it is parrafinic, Napthenic or aromtic. If K factor is equal or more than 12.5 means paraffinic and if equal or less than 10 means aromatic and in between napthenic
What is the best man made thermal conductor and the best thermal insualtor?
Aerogel is the best insulator [.004 W /( MK)] and diamond or diamond-chickenwire-tube (carbon nanotubes) are the best [2320 W/(MK)].
See:
http://en.wikipedia.org/wiki/Thermal_conductor
http://www.unitednuclear.com/aerogel.htm
