Natural gas containing a mixture of methane, ethane, propane, and butane is burned in a furnace with excess air.
- One hundred kmol/h of a gas containing 94.4mole% methane, 3.40% ethane, 0.60% propane, and 0.50% butane is to be burned with 17% excess air. Calculate the required molar flow rate of the air.
- Let hi(kmol/h) = molar flow* of the fuel gas
Xi, x2, x3, x» = mole fractions of methane, ethane, propane.
and butane, respectively, in the fuel = percent excess air
na( kmol/h) = molar flowr rate of the air ted to the furnace
Derive an expression for na in terms of the other variables. Check your formula with the results of Part (a).
Test your program on the data given below, assuming that 15% excess air is required in all cases. Then explore the effects of variations in and Rfon hafor the values of Af — A4 given on the third line of the data table. Briefly explain your results.
Rt | A, | a2 | a3 | A4 |
62 | 248.7 | 19.74 | 6.35 | 1.48 |
83 | 305.3 | 14.57 | 2.56 | 0.70 |
108 | 294.2 | 16.61 | 4.78 | 2.11 |
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 4 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
Additional Science Textbook Solutions
Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences)
Process Dynamics and Control, 4e
Structural Steel Design (6th Edition)
C Programming Language
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Web Development and Design Foundations with HTML5 (8th Edition)
- In a chemical production plant, cyclohexane is made by the reaction of benzene and hydrogen. Reaction is as follows: CHs + H2 → CoH12 The complete process of producing cyclohexane uses a reactor and a separator. Using the process shown below and assuming 20 % excess hydrogen in the fresh feed, find the ratio of the recycle stream to the fresh feed stream, the composition of the final product stream, and the composition of the stream leaving the reactor. The overall conversion of benzene is 92% and the single-pass conversion is 21.5 %. The recycle stream is composed of 23.9 % benzene and the remaining hydrogen. Fresh Feed REACTOR SEPARATOR Product Recyclearrow_forwardA steady-state process to recover crystalline potassium chromate (K,CrOz) from an aqueous solution of this salt is required. Four thousand kilograms per hour of a solution that is one-third K,CrO, by mass is joined by a recycle stream containing 36.4% K2CrO7, and the combined stream is fed into an evaporator. The concentrated stream leaving the evaporator contains 49.4% K,CrO; this stream is fed into a crystallizer in which it is cooled (causing crystals of K,CrO, to come out of solution) and then filtered. The filter cake consists of K,CrO, crystals and a solution that contains 36.4% K,CrO, by mass; the crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K,CrO,, is the recycle stream. 1- Draw the flowchart of the system and put all known information. 2- Calculate the rate of evaporation, the rate of production of crystalline K,CrO7, the feed rates that the evaporator and the crystallizer must be designed to handle, and…arrow_forwardA spent sulfuric acid solution is brought up to strength for a pickling process in a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous solutions. Determine all flowrates on the basis of 100 lbm/h of product. If the actual flow of the spent stream is 300 lbm/h, what must the flowrates of the streams be?arrow_forward
- 3. Given: Soda and lime are added to a glass batch in the form of soda ash (Na,CO,) and limestone (CaCO). During heating, these two ingredients decompose to give off carbon dioxide (CO₂), the resulting products being soda and lime. Find: Compute the weight of soda ash and limestone that must be added to 110 lb of quartz (SiO₂) to yield a glass of composition 72 wt% SiO₂, 16 wt% Na₂O, and 12 wt% Cao. Solution:arrow_forward+ |/ 00 %24 D. Two bulbs are connected by a stopcock. The 7.50 L bulb contains nitric oxide (NO) at a pressure of 0.340 bar, and the 2.50 L bulb contains oxygen (O,) at a pressure of 0.510 bar. 02 ON After the stopcock is opened, the gases mix and react to produce nitrogen dioxide (CON) 2 NO(g) + 0,(g) – 2 NO,(g) Considering that the volume remains unchanged during the experiment, how does the total pressure in the bulbs change if the reaction is allowed to go to completion? The total pressure will remain constant. O There is not enough information to determine how the total pressure will change. O The total pressure will decrease. O The total pressure will increase. MacBook Pro ( The %23 %24 7. 4. 5. 3. R %3D K. H. B C. option command MOSISOarrow_forwardA given soil sample is subjected for proximate analysis - specifically moisture content and analysis of inorganic matter (or ash) content. A cleaned and tared crucible is weighed in an analytical balance and found to be 4.5015 grams . The soil sample is weighed-in and the crucible, together with the plant sample, measured a total of 6.2525 grams. The set-up is then placed in an oven and dried to 105 degrees Celsius for at least two hours. The setup is cooled to room temperature in a dessicator and then measured to a constant weight of 5.9775 grams. Afterwards, the setup is placed inside the muffle furnace and ignited to 720 degrees Celsius for at least an hour. The set-up is cooled to room temperature again inside the dessicator and then measured to the constant weight of 4.9375 grams. (A) What is the percent moisture in the plant sample? Write the answer in THREE SIGNIFICANT FIGURES. (B) What is the percent volatile (organic) matter in the plant sample? Express answer in THREE…arrow_forward
- A circular lake of diameter 2.5m is receiving wastewater with a flow rate of 25 L/sec from a village has phosphorus concentration of 0.5 mg/L. The lake receives Phosphorus point source concentration of 0.8 g/sec. If the wastewater is completely mixed in the pond and removes phosphorus with a removal rate of 12 m/year, find the concentration of phosphorus (mg/L) in effluent water stream? Assume steady state. (Round-off to one decimal place).arrow_forward9. Ethane is burned with air in a continuous steady-state combustion reactor to yield a mixture of carbon monoxide, carbon dioxide, and water. The feed to the reactor contains 10 mol/min C2H6 and 200 mol/min air. The percentage conversion of ethane is 80%, and the gas leaving the reactor contains 8 mol CO2 per mol of CO. Determine the molar flow rate of the ethane gas in the product stream. (2 mol/min)arrow_forwardA spent sulfuric acid solution is brought up to strength for a pickling process in a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous solutions. Determine all flow rates on the basis of 100 lbm per hour of product. If the actual flow of the spent stream is 300 lbm per hour. What must the flow rates of the stream be?arrow_forward
- volume reactants gas products Na₂CO3 (s) + 2 HCI (aq) solution mass separate layer gram liquid solid coefficient CO₂ (g) + H₂O (1) + 2 NaCl (aq)|arrow_forward6- Floor beams of a transport airplane have been designed using an aluminum alloy containing 4.5 wt% Cu and 1.5 wt% Mg for a total weight of 95000 N. A customer has ordered the airplane but requested that its total weight be reduced by 10 percent for fuel saving purposes. An engineer in the design and analysis department has suggested that the weight saving objective can be accomplished by replacing the current aluminum alloy of the floor beams with another one containing 3 wt% Li and 1 wt% Cu. Is this possible? Answer the question by first determining the weight saving that will take place using the Al-Li alloy. Assume weighted averages of density and use the following densities for the mentioned materials: Al = 2.70 g/cm³ Cu = 8.92 g/cm³ Mg = 1.74 g/cm³ Li = 0.53 g/cm³arrow_forwardIn the combustion of heptane, CO, is produced. Assume that you want to produce 500 kg of dry ice per hour as shown in Fig. How many kilograms of heptane must be burned per hour? Other Products co, Solid 500 kg/hr Reactor C,H15 + 11 O2 7 CO, + 8 H;0 >arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781259911156/9781259911156_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305577213/9781305577213_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780078021558/9780078021558_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305079373/9781305079373_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781118431221/9781118431221_smallCoverImage.gif)