Metal-doped photocatalysts to reduce carbon dioxide in ethanolamine solution for methane production

Hung Yu Wu, Hsun-Ling Bai*, Jeffrey C S Wu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Photocatalytic reduction of carbon dioxide (CO 2) to form valuable energy source of methane (CH 4) in the ethanolamine (MEA) solution is investigated in this study. The TiO 2 photocatalysts were prepared by doping with nano-sized metals (Fe, Zn, Mn, Ce) via the co-precipitation method. The photocatalytic reduction process was performed in the MEA solution because the MEA absorption is one of the most popular methods for CO 2 greenhouse gas capture from flue gas streams. And it is intended to integrate the CO 2 capture and utilization into one process. The tests were performed with the UV light source of 9W and 365 nm. The light intensity of 6.3 mW/cm 2 was measured at the center point between the UV light source and the outer glass of the reactor. The 5 hours test results showed the methane yield followed the order of Ce-TiO 2 > Mn-TiO 2 > Zn-TiO 2 > Fe-TiO 2. Tests were also evaluated with a solar light concentrator, and it has been proved that it is possible to produce CH 4 under solar light without the addition of any external energy source.

Original languageEnglish
Title of host publicationTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Pages746-748
Number of pages3
StatePublished - 20 Aug 2012
EventNanotechnology 2012: Bio Sensors, Instruments, Medical, Environment and Energy - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 - Santa Clara, CA, United States
Duration: 18 Jun 201221 Jun 2012

Publication series

NameTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012

Conference

ConferenceNanotechnology 2012: Bio Sensors, Instruments, Medical, Environment and Energy - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
CountryUnited States
CitySanta Clara, CA
Period18/06/1221/06/12

Keywords

  • Carbon dioxide
  • Ethanolamine
  • Methane
  • Photocatalyst
  • Photoreduction

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  • Cite this

    Wu, H. Y., Bai, H-L., & Wu, J. C. S. (2012). Metal-doped photocatalysts to reduce carbon dioxide in ethanolamine solution for methane production. In Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 (pp. 746-748). (Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012).