Photochemical reduction of carbon dioxide in aqueous and ionic liquid solutions in a microreactor with TiO₂ catalyst; experiment and modeling Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/kp78gm40w

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Microtechnology was used to study the chemical reduction of dissolved carbon dioxide into useful products. A novel TiO₂ photocatalyst was used to activate the reaction under ultraviolet irradiation. CO₂ was dissolved in aqueous and 50% BMIM-BF₄ (ionic liquid) solutions. The introduction of an ionic liquid increased the solubility of CO₂ by 60%. Both solutions were pumped through a continuous photochemical microreactor and analyzed for products. The aqueous photochemical microreactor process produced 5x10⁻⁸-1x10⁻⁶ moles of methane per liter of solution processed. These values vary with mean residence time within the 0.016 mL microreactor volume. Serial reduction intermediates are likely present in solution below the detection limits of our analytical instruments. The 50% ionic liquid process produced 4x10⁻⁸-1x10⁻⁷ moles of methane per liter of solution processed. Similarly, no intermediates were measured. Mathematical models for the kinetic mechanism, momentum transfer, and mass transfer within the reactor were developed. These models were added to a numerical simulation and compared to experimental values. An optimization scheme was executed to extract meaningful reaction rate constants from the simulation that best fit the experimental data. Reaction rate constants reflect the feasibility of operating these processes and the numerical models can be used as design tools.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2013-05-21T14:43:46Z (GMT) No. of bitstreams: 1 MS Thesis T Campbell.pdf: 2692728 bytes, checksum: 8ecbe714ab704e1d8f4311b3b7fd6ba0 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2013-05-22T15:54:50Z (GMT) No. of bitstreams: 1 MS Thesis T Campbell.pdf: 2692728 bytes, checksum: 8ecbe714ab704e1d8f4311b3b7fd6ba0 (MD5)
  • description.provenance : Made available in DSpace on 2013-05-22T15:54:50Z (GMT). No. of bitstreams: 1 MS Thesis T Campbell.pdf: 2692728 bytes, checksum: 8ecbe714ab704e1d8f4311b3b7fd6ba0 (MD5) Previous issue date: 2013-05-14
  • description.provenance : Submitted by Travis Campbell (campbetr@onid.orst.edu) on 2013-05-21T13:33:56Z No. of bitstreams: 1 MS Thesis T Campbell.pdf: 2692728 bytes, checksum: 8ecbe714ab704e1d8f4311b3b7fd6ba0 (MD5)

Relationships

In Administrative Set:
Last modified: 10/19/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items