Mass Balance with Reaction for Chemical Engineering?
This is an interesting question and involves doing material balances in a couple of different places. First, draw a schematic of what is going into the reactor (stream 1 supplemented by stream 5 which when combined should then equal stream 2 which is actually fed to the reactor. Carry the schematic further to show stream 3 exiting the reactor ( and should be = in mass to stream 2) and entering the separator. Carry the schematic a little further showing stream 3 entering the separator and streams 4 (pure NH3) and stream 5 (only N2 and H2) leaving to be recycled back to the feed. The material balances would go as follows: stream 2 = stream 1 + stream 5 stream 3 = stream 2 (what goes in must come out) stream 4 (pure NH3) = stream 3 - stream 5. Now, from the stoichiometry of the reaction, single pass conversion of 25% and choosing a feed of 100 mol/s (25 mols N2 and 75 mols H2) that is where you get 50 mol/s of NH3. Stream 1 = 100 mol/s (your chosen basis) , stream 4 = 50 mol/s (calculated) See if you can figure it out from there.
Intro to chemical engineering. Reactors.chemical reactions?
Ethanol is produced commercially by the hydration of ethylene as: C2H4 + H2O → C2H5OH Some of the product is converted to diethyl ether in the side reaction: 2 C2H5OH → (C2H5)2O + H2O The feed to a reactor contains ethylene and steam in a 3:2 mole ratio, and 10 mol% inerts. The fractional conversion of ethylene is 5% and the selectivity of ethanol production relative to ether production is 18.0 mol/mol. Calculate the molar composition of the reactor output stream for a basis of 100 moles of feed to the reactor.
What is the role of a unit operation in chemical engineering?
Unit Operations are a fundamental principle in Chemical Engineering. The principle is: The mass production especially of large quantities of chemical products is accomplished by a sequence of Unit Operations, and each Unit performs one Operation.To react raw materials A and B into product P should be accomplished ONE STEP AT A TIME that is multiple UNIT OPERATIONS.Dissolve powder A in water, in a mixer designed to dissolve powder in water…Dissolve powder B, but it's only soluble in alcohol, in a different mixer, likely explosion resistant…Run the two solutions through a third mixer, designed to blend two liquids… Now A can be in contact with B…The mixed liquids go through a pump to increase it's energy, so it can flow through …A heat exchanger to raise the temperature to a level where the reaction proceeds quickly, then…The two mixed solutions travel through a plug flow reactor. Looks like a long tube…Then there is another heat exchanger, to cool the chemicals and stop the reaction…That's seven unit operations, right there.More follow, to separate the product P, remove impurities, recycle the water and alcohol, and even recapture unreacted A and B, which goes back to the beginning.Remember, in the chemistry lab, throwing a test tube of contaminated water or alcohol down the sink is easy. In industry, throwing a ton of dirty water or alcohol down the drain is an expensive waste, explosion hazard, environmental problem, and such.
What is the chemical equation for rusting iron?
It may be Fe(OH)2. I am not sure, you please confirm again with some other person
What should an Chemical Engineer on an ETP plant should know?
In an already erected , the job of the chemical engineer is mostly maintenance division. 1. It includes checking the functioning of various unit operations and processes like Separation by Screening, Flotation, Settling / Sedimentation, Filtration, Neutralization, Coagulation, Flocculation, Absorption, Adsorption, Chemical Reactions, Oxidation/Reduction, Dissolution, Ion exchange, Chlorination etc , depending on the industry.2. To carry out these unit operation,various equipment like Grit Removal Units. Primary Sedimentation / Settling tanks, Scraping Mechanisms, Sludge withdrawal, Sludge Sumps, Sludge Pumps, Aeration tanks and Aerators, Secondary Settling Tanks, Secondary Sludge Sumps, Pumps, Sludge Thickeners, Sludge Digesters, Gas Production, Sludge handling units are employed. 3. In a plant that is fully functional and looking for improvisation, the new recruits are generally assigned the task of understanding basic chemistry and physics behind the process carried out, material balance,water balance diagrams, P&ID etc.4. It would include innovative techniques of disposal or recycle.On the other hand if one is on a plant that is yet to be commissioned, the learning is much higher. It involves studying the P&ID ,proposing ideas, looking for faults etc.The last one happens rarely, so in a nutshell it's just maintenance and smooth operation that need to be handled.