1 / 13

CHEE 321: Chemical Reaction Engineering Module 3: Isothermal Reactor Design (Chapter 4, Fogler)

CHEE 321: Chemical Reaction Engineering Module 3: Isothermal Reactor Design (Chapter 4, Fogler). Example Problem : A packed bed micro-reactor for ‘ hydrogen production ’. Class Problem #5: PBR Micro-reactor. Picture source: www.mikroglas.com/.

kineks
Download Presentation

CHEE 321: Chemical Reaction Engineering Module 3: Isothermal Reactor Design (Chapter 4, Fogler)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHEE 321: Chemical Reaction EngineeringModule 3: Isothermal Reactor Design(Chapter 4, Fogler)

  2. Example Problem:A packed bed micro-reactor for ‘hydrogen production’

  3. Class Problem #5: PBR Micro-reactor Picture source: www.mikroglas.com/ Micro-structured reactors are gaining importance in chemical engineering applications. One potential application of compact micro-reactor is for “on-board” production of hydrogen for fuel cell applications. In this particular problem, production of Hydrogen via catalytic “methanol decomposition” in a channeled micro-reactor (circular cross-section) packed with catalyst particle will be considered.

  4. Class Problem #5: PBR Micro-Reactor Reaction: CH3OH  CO + 2H2 Operation Data Temperature: 1000 K Inlet Pressure: 1.5 atm Feed: Pure methanol Total molar flow rate = 1 x 10-7 mol/s Reactor information Number of channels = 10 channel diameter 400 mm = 4 x10-4 m channel length = 5 cm = 0.05 m porosity = 0.3 Catalyst Information Material: Cu on alumina dp =40 mm c=1400 kg/m3

  5. PBR Micro-Reactor: Schematic Representation Dia = 400 mm Equal distribution of flow in 10 channels FTO/10 = 6 x 10-8 mol/s 5 cm or 0.05 m Po = 1.5 atm (yCH3OH)0 = 1 FTO = 1 x 10-7 mol/s

  6. Isothermal T = To Class Problem #5: PBR Micro-Reactor [Solve for 1 channel only] 1. GMBE – Differential Form 2. Rate Law From Miszey et al (2001) 3. Stoichiometry

  7. Class Problem #5: PBR Micro-Reactor Stoichiometric Table Reaction:

  8. Class Problem #5: PBR Micro-Reactor From stoichiomteric table 3. Stoichiometry (contd.) The rate law is in terms of partial pressures, it would be useful to write partial pressure of components as a function of conversion X

  9. Class Problem #5: PBR Micro-Reactor 4. Combine – GMBE We need to substitute the rate law (in terms of X) into the following GMBE equation where the rate law is: Combined equation is

  10. Class Problem #5: PBR Micro-Reactor 5. Pressure drop equation

  11. Class Problem #5: PBR Micro-Reactor 6. Parameters Needed for Solving Mole Balance Equation

  12. Class Problem #5: PBR Micro-Reactor 7. Parameters Needed for Solving Pressure Drop Equation Where,

  13. Class Problem #5: PBR Micro-Reactor 7. Parameters Needed for Solving Pressure Drop Equation f =0.3

More Related