The environmental remediation of chlorophenol involves oxidation with hydrogen peroxide to produce steam, hydrochloric acid, and carbon dioxide inside a cold worked and annealed zirconium 702 (properties under miscellaneous nonferrous alloys) reactor. C6H5ClO + 13 H2O2 → 6 CO2 + HCl + 15 H2O In the short term, you have to make a temporary replacement of a non-zirconium thermocouple (temperature-measuring device) to control the temperature at 380oC and 250 atm. The reactor is located outdoors and is operated in batch mode, and in to halt the reaction, NaOH is added, the neutralized products are emptied, and the reactor is readied for the next batch of chlorophenol to destroy. When H2O2 decomposes, it does generate H2 gas as an intermediate before that hydrogen gets consumed in the reaction.
1) (5 pts.) A) What factors might lead to any type of failure for the reactor or reaction?
(5 pts.) B) Associate each factor from part A with a failure mechanism.
(5 pts.) C) What can you do to prevent the scenario described in A) from failing?
(12 pts.) D) Look up the properties of “zirconium, reactor grade 702” alloy in appendixb.pdf under Miscellaneous Nonferrous Alloys. Calculate the energy per unit volume necessary for reactor explosion, presuming no cracks. You do not need an area or thickness. As part of this problem, sketch the stress vs. strain diagram.
EN(B) = EN(N) =
Bond radius for B = Bond radius for N =
B and N atoms (or ions). You may want to do part G first.
a decimal (not in terms of “a”, the lattice parameter).
3) (2 pts.) Classify the following materials as metals, insulators, or semiconductors.
4) (9 pts.) Provide a list of at least 3 causes (including all obvious ones) of why an offshore oil rig drilling in 200 m deep water might fail, associate these causes with corresponding failure mechanisms, and list a set of actions you will take to prevent failure.
5) (18 pts. total) Using the accompanying platinum-vanadium phase diagram, if you start at 1900oC and cool down very slowly to 800oC, sketch the microstructure associated with each temperature, determine what phases are present at each temperature, determine the compositions for each phase, and determine the weight in each phase. The 100 kg of Pt-V mixture has 28 wt. % V in it. Several compounds have their chemical formulas as “names”.
1900oC) Microstructural drawing Phase(s) present
Weight % of V in each phase
Weight of each phase
1725oC) Microstructural drawing Phase(s) present
above line
Weight % of V in each phase
Weight of each phase
1420oC) Microstructural drawing Phase(s) present
above line
Weight % of V in each phase
Weight of each phase
800oC) Microstructural drawing Phase(s) present
Weight % of V in each phase
Weight of each phase
6) (7 pts.) Discuss the applicability (or lack of applicability) of heat treating and aging to the platinum/vanadium material you made in the prior problem. If heat treating
and aging is both worthwhile and possible, develop a “recipe” (including
temperatures and either endpoints or times) to make the Pt/V sample as hard as
it can get. If heat treating and aging is either irrelevant or not possible, explain
why this is so.
7) Using the accompanying time-temperature-transformation diagram for 4340 steel, outline a procedure by which you would generate the following steel phases. You can draw your answer on the TTT diagram.
Page 1 Total ____/29
Page 2 Total ____/23
Page 3 Total ____/17
Page 4 Total ____/18
Page 5 Total ____/13
Total ____/100
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more