4.8 Article

Photo-Fenton enhanced twin-reactor for simultaneously hydrogen separation and organic wastewater degradation

期刊

APPLIED CATALYSIS B-ENVIRONMENTAL
卷 281, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.apcatb.2020.119517

关键词

photocatalysis; Fe2+/Fe3+ pair; isopropanol degradation; water splitting; hydrogen

资金

  1. Ministry of Science and Technology(MOST), Taiwan [MOST 108-2923-E-002-006-MY3]
  2. Academia Sinica of Taiwan [AS-KPQ-106-DDPP]

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The research focused on using a twin-reactor system with photo-Fenton technology to simultaneously produce hydrogen and degrade wastewater. By utilizing the Fe2+/Fe3+ pair for electron mediation and different catalysts, the system achieved higher hydrogen production and organic wastewater degradation efficiency.
This research investigated photo-Fenton enhanced in a twin-reactor for hydrogen evolution and wastewater photodegradation simultaneously. The twin-reactor, which was two coupled reactors divided by a membrane, can simultaneously photodegrade isopropanol wastewater and separate hydrogen from water splitting. Fe2+/Fe3+ pair was used as electron mediator in the twin reactor by counter-diffusing between hydrogen and photodegradation sides. Moreover, Fe3+ also triggered photo-Fenton reaction to enhance the degradation of organic wastewater. SrTiO3:Rh, Pt/SrTiO3:Rh and Ru/SrTiO3:Rh were used for hydrogen evolution. For isopropanol degradation, P25 (TiO2) and WO3 were applied. The light source was simulated sunlight using 300 W Xe lamps with AM1.5 filter. Compared with the single reactor, the isopropanol removal increased 125% and hydrogen evolution was up 37% due to H-2 separation and inhibition of reverse reaction of water splitting. In the twin reactor, 95% of pure hydrogen was obtained in the hydrogen evolution side, thus saved the cost of afterward purification.

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