Title

Hydrogen Production Via Uv Photolysis Of Aqueous Ammonium Sulfite Solutions

Keywords

Hydrogen; Photolysis; Thermochemical cycle; UV light; Water splitting

Abstract

This paper describes a new hydrogen production process using UV photolysis of aqueous ammonium sulfite solutions. A series of experiments have been conducted to determine the kinetics of the reaction and optimum reaction parameters. Using an HPLC, the concentrations of sulfite (SO32-), sulfate (SO42-) and dithionate (S 2O62-) ions in the photoreactor were determined. Results indicate that SO32- ions can be photooxidized into SO42- under UV light irradiance. Based on the measured material balance and reaction kinetics, it was shown that the mechanism of the ammonium sulfite photolysis follows two reaction pathways: 1) SO32- ions are directly oxidized into SO42-; and 2) SO32- ions become oxidized generating S2O62-, which then themselves convert into SO42- ions. The first route is the dominant reaction pathway. The results for the effect of pH and temperature on hydrogen production rates are also presented and discussed.

Publication Date

12-1-2006

Publication Title

16th World Hydrogen Energy Conference 2006, WHEC 2006

Volume

2

Number of Pages

1010-1018

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84875594498 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84875594498

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