Problem 1 [40 points]: A thermal gravimetric analyzer (TGA) is a common instrument used in materials...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Problem 1 [40 points]: A thermal gravimetric analyzer (TGA) is a common instrument used in materials science laboratories. In this instrument, a sample is placed on a balance that is suspended inside of a ceramic furnace. The sample can then be heated to a desired temperature under a controlled atmosphere while the mass change of the sample is measured. The sample pan in the TGA is contained within a porous ceramic furnace. The TGA has recently been used to study the sorption and desorption of water from a new material. Unfortunately, the TGA was exposed to a saturated water vapor stream, and water condensed within the porous ceramic wall of the furnace. The TGA will not operate correctly while it is water-logged. You decide to dry the TGA by flowing N2 through the furnace; however, you do not have a water vapor sensor handy, and thus you are not sure how long it will take for the furnace to dry completely. You decide to estimate the drying time for this piece of equipment using some mass transfer approximations. You find the following information: 1. Ceramic properties: Pore size of ceramic (diameter) = 100 nm, porosity = 40%, tortuosity = 2, density of porous ceramic 2.5 g/cm 2. Dimensions of ceramic furnace (Figure 1): a. Outer diameter: 5.0 cm, inner diameter: 2.5 cm, height: 6 cm 3. Water sorption isotherm in the ceramic (Figure 2) 4. Correlation for boundary layer thickness and velocity (Figure 3) a. 8[m] = 5.1x10-5 1 UN2[m/s]' which is approximately valid for all temperatures in this situation: To dry the TGA, you will flow N2 gas at 1 atm through the furnace and heat it. However, one complication exists: if the water content in the furnace is above 0.21 g20/gceramic at temperatures above 100C, the furnace will crack. Hint for this problem: think about the coordinate system carefully to avoid making this problem more difficult than it already is! Problem 1 [40 points]: A thermal gravimetric analyzer (TGA) is a common instrument used in materials science laboratories. In this instrument, a sample is placed on a balance that is suspended inside of a ceramic furnace. The sample can then be heated to a desired temperature under a controlled atmosphere while the mass change of the sample is measured. The sample pan in the TGA is contained within a porous ceramic furnace. The TGA has recently been used to study the sorption and desorption of water from a new material. Unfortunately, the TGA was exposed to a saturated water vapor stream, and water condensed within the porous ceramic wall of the furnace. The TGA will not operate correctly while it is water-logged. You decide to dry the TGA by flowing N2 through the furnace; however, you do not have a water vapor sensor handy, and thus you are not sure how long it will take for the furnace to dry completely. You decide to estimate the drying time for this piece of equipment using some mass transfer approximations. You find the following information: 1. Ceramic properties: Pore size of ceramic (diameter) = 100 nm, porosity = 40%, tortuosity = 2, density of porous ceramic 2.5 g/cm 2. Dimensions of ceramic furnace (Figure 1): a. Outer diameter: 5.0 cm, inner diameter: 2.5 cm, height: 6 cm 3. Water sorption isotherm in the ceramic (Figure 2) 4. Correlation for boundary layer thickness and velocity (Figure 3) a. 8[m] = 5.1x10-5 1 UN2[m/s]' which is approximately valid for all temperatures in this situation: To dry the TGA, you will flow N2 gas at 1 atm through the furnace and heat it. However, one complication exists: if the water content in the furnace is above 0.21 g20/gceramic at temperatures above 100C, the furnace will crack. Hint for this problem: think about the coordinate system carefully to avoid making this problem more difficult than it already is!
Expert Answer:
Related Book For
Posted Date:
Students also viewed these chemical engineering questions
-
You have constructed a table to calculate the duration of 2 year coupon paying bonds issued by Earth Bank at a yield of 5% pa compounded half-yearly . The bonds have a face value of $120,000 and a...
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...
-
SQL Queries Help For the SYSDES team, list the evaluatees and evaluators and theevaluation scores. Show the full name of evaluates and evaluator,the evaluation ID, the evaluation item and the score....
-
Let L, M be linear functions. (a) Prove that ker(L M) ker M. (b) Find an example where ker(L M) ker M.
-
Explain risk management in thrift institutions.
-
The scores on the SAT French Subject Test for the 2018 2020 graduating classes are normally distributed, with a mean of 603 and a standard deviation of 111. Random samples of size 16 are drawn from...
-
Palo Alto Corporation is considering purchasing a new delivery truck. The truck has many advantages over the companys current truck (not the least of which is that it runs). The new truck would cost...
-
Orlie construction company has constructed to build an office building. The construction is scheduled to begin on January, 2013, and the estimated time of completion is July 1, 2016. The building...
-
The management of Zigby Manufacturing prepared the following balance sheet for March 31. Cash Accounts receivable Raw materials inventory Assets ZIGBY MANUFACTURING Balance Sheet March 31 Liabilities...
-
Global Corp. sells its output at the market price of $9 per unit. Each plant has the costs shown below: Units of Output Total Cost ($) 7 1 9 2 13 19 4 27 37 49 7 63 What is the breakeven quantity?...
-
A drug is ordered with a loading doseof 25 mcg/kg over 10 minutes in 50 mL of D5W. This is followed by a continuous infusion of 0.75 mcg/kg/min in1000 mL of D5W/LR. The patient weighs 176 lbs. The...
-
The ledger of Beckett Rental Agency on March 31 of the current year includes the selected accounts below before adjusting entries have been prepared. Debit Credit Supplies $3,000 Prepaid Insurance...
-
How do CRISPR-Cas systems provide insights into the co-evolutionary arms race between bacteria/archaea and their phages/plasmids, and how can this knowledge be applied in phage therapy and...
-
You are a network administrator at Woodgrove Bank. Before implementing Active Directory and Exchange Server 2007 within your organization, you wish to investigate how DNS and SMTP work to relay email...
-
SIMPLE convenience store is arranging a promotion plan for the next season. The marketing team wants to select 600 registered customers for a survey to get some ideas for the promotion. In the...
-
The There 4 U Company (T4UC) commenced trading on 1 January 20X6.It was founded by Ken Matthews, who is the managing director of T4UC. The initial aim of T4UC was to provide 'good quality' repairs...
-
Draw the appropriate control flow graph of the given pseudocode.Make sure to only use one number for blocks of code which are all sequential and when the first line is executed, all of those lines...
-
Compound A undergoes a reversible isomerization reaction, A B, over a supported metal catalyst. Under pertinent conditions, A and B are liquid, miscible, and of nearly identical density; the...
-
Solar energy capture has great potential to help meet the worlds growing energy demand, which is 12 terawatts in 2010 and is expected to rise to 36 terawatts in 2050. Professor Al Weiner and his...
-
Describe how would your reactor volume and number of reactors change if you only needed 50% conversion to produce the 200 million pounds per year required?
-
Convert 3.8874 to fraction form and reduce to lowest terms. Do the indicated conversion. If it is a repeating decimal, use the correct notation.
-
Convert \(\frac{27}{625}\) to decimal form. Do the indicated conversion. If it is a repeating decimal, use the correct notation.
-
\(\frac{3}{5}+\frac{3}{10}\) Perform the indicated operations. Reduce to lowest terms.
Study smarter with the SolutionInn App