Photocatalytic reduction of CO2 by CO co-feed combined with photocatalytic water splitting in a novel twin reactor

Shang Li, Lijun Yang, Oluwafunmilola Opeyemi Ola, M Mercedes Maroto-Valer, Xiaoze Du, Yongping Yang

Research output: Contribution to journalArticle

14 Citations (Scopus)
171 Downloads (Pure)

Abstract

As a promising way to control greenhouse gas emission and alleviate global energy shortage, photocatalytic reduction of carbon dioxide attracts more attentions in recent years since it can produce fuels efficiently with the combination of H2 through water splitting. In this work, a computational model which characterizes the photocatalytic reduction of carbon dioxide by CO co-feed in a novel twin reactor is developed with three subsidiaries of chemical reaction kinetics, gas–liquid mass transfer, and transient sun light intensity distribution. Thanks to previous experimental work as the reliable verification for the numerical simulation, the variations of the CH3OH concentration with the CO/CO2 ratio of gas mixture, pressure and temperature are obtained and analyzed. The results show that the carbon in CO can form CH3OH directly, however the excessive CO will react with HCOOCH3 to form CH3CHO, which results in a reduced CH3OH concentration. Besides, the CH3OH concentration subsequently increases as the temperature and pressure increase, and the CH3OH product and reaction rate vary widely with time due to the changing sun light intensity during the day.
Original languageEnglish
Pages (from-to)184-193
Number of pages10
JournalEnergy Conversion and Management
Volume116
Early online date12 Mar 2016
DOIs
Publication statusPublished - 15 May 2016

Keywords

  • Twin reactor
  • CO2 reduction
  • Water splitting
  • Photocatalysis
  • Methanol
  • Sun light intensity

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