Title

Uv Photochemical Oxidation Of Aqueous Sodium Sulfide To Produce Hydrogen And Sulfur

Keywords

Hydrogen; Hydrogen sulfide; Sulfide oxidation; Sulfur recovery; UV photolysis

Abstract

Sodium sulfide solutions were illuminated with ultraviolet light (λ=253.7nm) to produce hydrogen and disulfide ion in equimolar amounts. The quantum efficiency for hydrogen production was as high as 27% for a 0.5M Na2S solution in a batch reactor. While light intensity and sulfide concentration had a pronounced effect on reaction rate, the photochemical process was found to be pH independent within the range 8.5-13.3. A mechanism involving adsorption of bisulfide ion on the inner sleeve of the photoreactor is postulated. Elemental sulfur could be recovered from the disulfide solution via purging with H2S and then filtering. The resulting filtrate was also photoactive, suggesting the possibility of a continuous closed cycle photochemical operation for H2S decomposition into its constituent elements. © 2004 Elsevier B.V. All rights reserved.

Publication Date

12-1-2004

Publication Title

Journal of Photochemistry and Photobiology A: Chemistry

Volume

168

Issue

3

Number of Pages

153-160

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jphotochem.2004.03.028

Socpus ID

7044249734 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/7044249734

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