could You please help me with this che question? any suggestion? A system must b
ID: 877443 • Letter: C
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could You please help me with this che question? any suggestion? A system must be designed and installed to maintain constant pressure of about 1.0 atm in the ce of a large storage tank for liquid n-octane. Three ideas have been suggested. ) One line feeds compressed air to the tank when a drop in tank pressure is detected, and a econd line vents the gas in the tank headspace to the atmosphere when pressure rises in the tank. (2) One line feeds nitrogen gas to the tank when a drop in tank pressure is detected, and a econd line vents the gas in the tank headspace to the atmosphere when pressure rises in the tank. (3) One line allows the tank headspace to exchange gas freely with the atmosphere, so the headspace in the tank will always be at atmospheric pressure. The engineer in charge of this project, an experienced mechanical engineer, has asked which option you support. Write a memo supporting one of these options to the engineer in charge. Submit your memo as a single pdf file via Blackboard The storage tank for liquid n-octane has a diameter of 30 ft and a height of 20 ft. It is to be constructed of carbon steel and meets appropriate codes to ensure that it can withstand the static pressure when it is completely full of n-octane. Under normal operation, there should be a maximum depth of 18 ft and a minimum depth of 5 ft of n-octane in the tank. If the tank were sealed so that only n-octane could enter and leave, then the tank would be "sucked in" by falling pressure in the headspace when liquid was withdrawn, and would bulge or rupture due to increasing pressure of the gas in the headspace when liquid was added ur memo must support one option and explain your reasoning. As an engineer, you should consider safety, environmental protection, and cost. As a chemical engineer, it saying that you is not a "deterministic" problem: you will not find "the right answer" in a t by using an equation. However, you should have sufficient background to choose an option and justify your choice. If you think that additional research is required before a final decision, then you must identify the specific information which is missing. goes without will take into account the chemical properties of n-octane in this decision. ThisExplanation / Answer
THE OPTION 2 IS THE BEST OPTION
Option 1 is not advisable for the following reason.If compressed air is fed into the tank to maintain the constant pressure,when the pressure goes below 1 atmos, the air which contains oxygen will form an EXPLOSIVE MIXTURE with n-octane
Option 3 is not recommended for the following reason.If the tank is allowed to EXCHANGE gas freely with atmosphere, air will enter the tank when the pressure inside the tank goes below 1 atmos. This will result in the formation of an explosive mixture (n-octane +air) as in option 1
Option 2 is the best option because nitrogen gas is an inert gas which will not form any explosive mixture with n-octane
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