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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.

500 Questions

What are the safe working practices and procedures to be observed when working with tig or plasma arc welding equipment?

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Asked by Wiki User

Before any work is done on the machine you must ensure that the correct risk assessments are in place and have been fully read so you're aware of the dangers that the machine possess.

When working with machinery you should always ensure that you're competent to use it, do not use equipment that you're not trained to use. When using machinery always be aware of where you're emergency stop buttons are and where there are any areas in which you could be caught, entangled or trapped in moving parts. Always ensure that you remove any lose clothing or jewellery and tie back long hair. Ensure that all machine guards are put in place before using the machine.

When using an automated welder, you should always ensure that you wear the correct P.P.E at all times. Always wear a long sleeve welding jacket to cover any bare skin to stop UV burns. Use a welding helmet or face shield when the arc is in process to protect your face from UV burns and your eyes from "arc eye". Wear safety glasses at all times to ensure that your eyes are protected from any particles or debris that my fly into your eyes. Before, during and after welding ensure that there are adequate welding screens around the equipment to protect others in the vicinity from the welding arc. Also if necessary use the correct fume extraction equipment to remove any unwanted fumes, this will not only protect your but others in the vicinity.

On completion of any welding activity the machine must be shut down in the correct manner, to avoid any malfunctions and damage to the software. You should dispose of any waste, i.e. filler wire, materials, in the correct manner that applies with the COSHH regulations.

What is stone wall effect in compressor?

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Asked by Mujeeb4u33

The term stonewall refers to the condition when the compressor fails to develop any head, as the suction volumetric flow is too high for a given RPM. (Recall that, typically, the head drops off as suction flow increases for a given RPM. Eventually, the head v/s suction flow curve becomes nearly vertical at the stonewall flow.)

Stonewall or Choke - occurs under one of 2 conditions. Typically for high speed equipment, as flow increases the velocity of the gas/fluid can approach the gas/fluid's sonic speed somewhere within the compressor stage. This location may occur at the impeller inlet "throat" or at the vaned diffuser inlet "throat".

Applications of venturimeter?

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Asked by Wiki User

1. It is used for flow measerment with minimum head loss.

2. It is used in industries for flow measerment of chemicals.

3. it is also used in the airoplane for measurment of speed of plane.

How does operating pressure affect distillation?

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Asked by Wiki User

Pressure is an important part in distillation because boiling points of different components to be separated depends on pressure, for normal distillation pressure is kept as 1 atmosphere but for components with high boiling points instead of rasing the temperature pressure is lowered till the vapor pressure of the components to be separated, hence the temperature to be raised becomes less, for example in vaccum distillation.

What is the role of a chemical engineer in a power plant?

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Asked by Wiki User

Power generation plants typically require mechanical and electrical engineers as a majority of the workforce; however there are a few areas that a chemical engineer can get involved in. Any treatment processes within the plant, such as air, water, etc. can be done by a chemical engineer. If the power plant produces chemical wastes, such as tritium in a nuclear power plant, this isotope has to be removed in a process containing distillation columns and other chemical engineering processes, making chemical engineers ideal for this position.

Some chemical engineers can work within risk assessment and can do work to determine risks within the plant and how best to prevent them.

How do you increase the flash point in diesel oil?

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Asked by Wiki User

A low flash point in diesel is caused by contamination of the diesel with lighter petroleum products such as kerosene or gasoline. Drawing more lighter products out of the fractionation tower could reduce contamination of the heavier products. Improving fractionation and improving diesel product stripping performance will raise the flash point.

How much gas does California use?

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Asked by Wiki User

An estimated 250,000,000,000,000 a year.

What is the difference between upstream and downstream?

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Asked by Wiki User

the upstream of a pipe is its inlet and the downstream is its outlet

****if your talking about broadband/internet speed*****downstream is taking information from the internet.(downloading) upstream is putting info on the internet uploading

Are most water polo players tall?

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Asked by Herb123

It does give players an advantage such faster swimming speeds, more reach and big hands. However, not all water polo players are tall. I know a someone who was 3rd team all-american and she is barely over 5'6".

What is distillation column?

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Asked by Wiki User

This type of column is used by ephedrine manufacturer. Please refer Kreps biochemical & industries, Nellore, Andhra pradesh, India.

What is free carbon in cast iron?

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Asked by Wiki User

Free carbon in cast iron refers to carbon that exists in its elemental form within the iron matrix. It appears as graphite flakes or nodules, contributing to the material's unique properties, such as high fluidity during casting and improved machinability. This free carbon distinguishes cast iron from other metals.

What are the properties of rubber bands?

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Asked by Wiki User

As rubber band is made up from rubber, it possess properties of rubber.

main property of rubber is "ELASTICITY" i.e. whenever you stretched rubber or rubber band it gets stretched & when you released it, it will gain it's original size & shape again.

Is there any sustainable materials that can replace plastic?

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Asked by Wiki User

A promising polymer that could be grown sustainably and that could possibly replace typical plastic is cellulose. Cellulose is a organic polymer produced within plants and there is research in developing some stable products from this resource; however, a lot of research still needs to be done within this area.

What are all the methods to trapping co2?

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Asked by Wiki User

Some methods of trapping carbon dioxide are: electrochemical reduction, cooling it into a liquid, and passing the gas through an alkali.

How does chilled brine plant work?

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Asked by Wiki User

Brine plant will gives us the temparature below zero degrees. but where as in chilled plant the temparature above zero only

How do you a make wood fire burn hotter?

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Asked by Wiki User

The best way to make a fire burn hotter is to use the hottest burning logs that you can. Oak, Ash and Black Locust burn very hot. Feed them into the fire along with fast burning wood such as Maple to keep the fire raging. If you do not burn a fast burning wood with the Oak and Ash, they will burn very hot, but very slowly. The object is to make as many red hot coals from the Oak and Ash at the base of the fire as possible. That is where the heat from your fire will come from and the more coals the hotter the fire will feel. Additional information for those seeking info on other than fireplace fires It also helps to make a low side base surrounded by something and make it narrow at the top, so that all the fire is more focused in one spot. using all these ideas was what made the first copper, silver, and gold things. you may ask yourself how can you make a fire so hot that it burns metal but not whats surrounding it. rocks, carefully build rock kilns.

How does voltage and current work together to produce power?

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Asked by Wiki User

That depends on the exact circumstances. For example, in electrical circuits, power = I2R. However, since the current, in turn, depends on the voltage and the resistance, it is better to express this as V2/R. For mechanical energy, power is basically speed times force.

Cryogenic engine technology?

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Asked by Wiki User

The cryogenic engines uses liquid nitrogen as the fuel and the exhaust is also nitrogen. Since nitrogen is present nearly 78% in our atmosphere, the engine is non pollutant. whereas in the case of normal IC engine, the exhaust is carbon monoxide, CO2 and other harmful gases. Efficiency is higher in the case of cryogenic engine than that of petrol engines.

The AnswerCryogenic engines use frozen dead people which gives no polution unless the person lived a bad life. Petrol engines give off carbon monoxide which makes more frozen dead people.

Slightly different answer (but I like the 'dead people' idea)

Most cryogenic engines use liquid hydrogen and liquid oxygen as fuel. To remain liquid they have to be kept cold (below about -253C and -184C respectively). The thrust mainly comes from gasifying the fuels, which is done by feeding the heat of combustion of hydrogen in oxygen back to the gasifying chambers; the initial heat of gasification usually comes from a small electric heater or pyrotechnic igniter but then is self-supplying. The fuels are non-polluting (in general terms) as the only waste product is water in the form of steam, easily reused in the heating process before being ejected to provide thrust. Little thrust is provided by petrol engines as they have nothing to push against in space; however, combining the cryogenic engine with a gas turbine could provide power for road-going vehicles - the main problem being the massive insulation and the refrigeration to keep the fuel cold.

I think that using smaller amounts of hydrogen and oxygen as fuel for heating liquid nitrogen as the main thrust fuel would work very well and am surprised that this does not seem to have been tried.

What is the difference between a chemical engineer and a nuclear engineer?

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Asked by Wiki User

The main difference is specilization. I am a chemical engineer myself, and we have the option of specializing in a wide variety of degrees, such as genetic engineering. Note that chemical engineering is a very broad field dealing with polymers, metallurgy, biology, environmental chemistry, and the list goes on. Genetic engineering, in short, is really a specialization of chemical engineering to specifically biological chemistry.

How much steam does a liter of water produce?

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Asked by Wiki User

It depends at what temperature. If we assume that it is at its boiling point already, then you do the equation. Q=MH(f). Q= heat, m=mass, and H is the feat of fusion. For water it is 2260J/g. So do it like this. Q=1000mL * 2260J/g. You need 2260 kJ to heat 1L of water at its boiling point.

How do you remedy corrosion?

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Asked by Wiki User

its pretty much over once a car gets to that stage, even if you give it a 3000 dollar body job , the rust will return. Best advice is buy a newer car and underspray it every summer. Corrosion is like cancer - you need to remove it and protect non-damaged areas against it with undercoatings. Corrosion in a battery compartment can be dramatically reduced by saturating the area with baking soda dissolved in warm water.

How do they make the GloFish glow I mean I know its a GM animal but what made it glow?

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Asked by Wiki User

I got this info from "http://www.glofish.com/faq.asp#TheScienceofGloFish" Where does the fluorescent color come from?

The fluorescent color in our fish is produced by a fluorescent protein gene, which creates the beautiful fluorescence that can be seen when looking at the fish. The fluorescent protein genes occur naturally, and are derived from marine organisms. Exactly how is the fluorescent protein gene added to the fish? Every line of GloFish® fluorescent fish (i.e., GloFish® Starfire Red® Zebra, GloFish® Electric Green® Zebra, and GloFish® Sunburst Orange® Zebra) starts with a single fish. The process begins by adding a fluorescence gene to the fish before it hatches from its egg. Once the gene integrates into the genome (i.e., genetic code) of the embryo, the developing fish will be able to pass the fluorescence gene along to its offspring upon maturity. Because of this, the gene only needs to be added to one embryo; from that point forward, all subsequent fluorescent fish are the result of traditional breeding.