Methane and oxygen react in the presence of a catalyst to form formaldehyde. In a parallel reaction, methane is oxidized to carbon dioxide and water:
CH4 + Cb -> HCHO + H2O
CH4 + 202 -* CO2 + 2H2O
The teed to the reactor contains equimolar amounts of methane and oxygen. Assume a basis of 1 (X) mol feed/s.
- Draw and label a flowchart. Use a degree-of-freedom analysis based on extents of reaction to determine how many process variable values must be specified for the remaining variable values to be calculated.
- Use Equation 4.6-7 to derive expressions for the product stream component flow rates in terms of the two extents of reaction. £1 and ^2.
- The fractional conversion of methane is 0.900 and the fractional yield of formaldehyde is 0.855. Calculate the molar composition of the reactor output stream and the selectivity of formaldehyde production relative to carbon dioxide production.
- A classmate of yours makes the following observation: “Ifyou add the stoichiometric equations far the two reactions, you get the balanced equation 2CH 4 + 3O 2 - HCHO + CO 2 + 3H 2O
The reactor output must therefore contain one mole of CO2 for every mole of HCHO, so the selectivity' of formaldehyde to carbon dioxide must be 1.0. Doing it the way the book said to do it, I got a different selectivity. Which way is right, and why is the other way wrong?" What is your response?
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Elementary Principles Of Chemical Processes
Additional Engineering Textbook Solutions
Problem Solving with C++ (10th Edition)
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
Starting Out With Visual Basic (8th Edition)
Thermodynamics: An Engineering Approach
Starting Out with C++: Early Objects (9th Edition)
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
- The power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forwardstep by step pleasearrow_forwardstep by step pleasearrow_forward
- step by steparrow_forwardThe power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forwardThe power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forward
- O Consider a 0.8 m high and 0.5 m wide window with thickness of 8 mm and thermal conductivity of k = 0.78 W/m °C. For dry day, the temperature of outdoor is -10 °C and the inner room temperature is 20°C. Take the heat transfer coefficient on the inner and outer surface of the window to be h₁ = 10 W/m² °C and h₂ = 40 W/m² °C which includes the effects of insulation. Determine:arrow_forwardCalculate the mass flow rate of the steam. Determine Cp and C₁ of steam.arrow_forwardstep by step pleasearrow_forward
- step by steparrow_forward4. Show that the fraction, F, of the energy released from a supercritical chain reaction that originates in the final m generations of the chain is given approximately by F= 1 km provided the total number of generations is large.arrow_forwardPLEASE SOLVE STEP BY STEP WITHOUT ARTIFICIAL INTELLIGENCE OR CHATGPT I don't understand why you use chatgpt, if I wanted to I would do it myself, I need to learn from you, not from being a d amn robot. SOLVE BY HAND STEP BY STEP A solution containing 7.5% sulfuric acid by weight at 70 °F is concentrated to 45% by weight by evaporating water. The concentrated solution and the water vapor exit the evaporator at 170 °F and 1 atm. Calculate the rate at which heat must be transferred to the evaporator to process 1500 lbm/hr of the feed solution to the evaporator. It is recommended to use the enthalpy-concentration diagram for sulfuric acid from Chapter 8 of Felder's book or an enthalpy-concentration diagram for sulfuric acid found in another unit operations book or chemical engineering manual such as Perry's.arrow_forward
- Introduction to Chemical Engineering Thermodynami...Chemical EngineeringISBN:9781259696527Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark SwihartPublisher:McGraw-Hill EducationElementary Principles of Chemical Processes, Bind...Chemical EngineeringISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEYElements of Chemical Reaction Engineering (5th Ed...Chemical EngineeringISBN:9780133887518Author:H. Scott FoglerPublisher:Prentice Hall
- Industrial Plastics: Theory and ApplicationsChemical EngineeringISBN:9781285061238Author:Lokensgard, ErikPublisher:Delmar Cengage LearningUnit Operations of Chemical EngineeringChemical EngineeringISBN:9780072848236Author:Warren McCabe, Julian C. Smith, Peter HarriottPublisher:McGraw-Hill Companies, The