Batch slurry photocatalytic reactors for the generation of hydrogen from sulfide and sulfite waste streams under solar irradiation

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2009.06.012· OSTI ID:21227414

Priya, R; Kanmani, S ^[1]

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1. Centre for Environmental Studies, Anna University, Chennai (India)

In this study, two solar slurry photocatalytic reactors i.e., batch reactor (BR) and batch recycle reactor with continuous supply of inert gas (BRRwCG) were developed for comparing their performance. The performance of the photocatalytic reactors were evaluated based on the generation of hydrogen (H{sub 2}) from water containing sodium sulfide (Na{sub 2}S) and sodium sulfite (Na{sub 2}SO{sub 3}) ions. The photoreactor of capacity 300 mL was developed with UV-vis transparent walls. The catalytic powders ((CdS/ZnS)/Ag{sub 2}S + (RuO{sub 2}/TiO{sub 2})) were kept suspended by means of magnetic stirrer in the BR and gas bubbling and recycling of the suspension in the BRRwCG. The rate constant was found to be 120.86 (einstein{sup -1}) for the BRRwCG whereas, for the BR it was found to be only 10.92 (einstein{sup -1}). The higher rate constant was due to the fast desorption of products and suppression of e{sup -}/h{sup +} recombination. (author)

• OSTI ID: 21227414
• Journal Information: Solar Energy, Vol. 83, Issue 10; Other Information: Elsevier Ltd. All rights reserved; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
14 SOLAR ENERGY
CADMIUM SULFIDES
HYDROGEN SULFIDES
SILVER SULFIDES
SODIUM SULFIDES
ZINC SULFIDES
HYDROGEN PRODUCTION
SODIUM COMPOUNDS
SULFITES
SLURRIES
PHOTOCATALYSIS
REACTION KINETICS
RUTHENIUM OXIDES
TITANIUM OXIDES
AQUEOUS SOLUTIONS
DESORPTION
SOLAR RADIATION
PERFORMANCE
COMPARATIVE EVALUATIONS
POWDERS
CHEMICAL REACTORS
Photoreactors