Optimization of operating parameters for gas-phase photocatalytic splitting of H2S by novel vermiculate packed tubular reactor. (1st October 2016)

• Record Type: Journal Article
• Authors: Preethi, V.; Kanmani, S.
• Is Part Of: Journal of environmental management. Volume 181(2016)
• Page Start: 674
• Page End: 680
• Publication Date: 2016-10-01
• Subjects: Photocatalysis -- Hydrogen sulphide splitting -- Hydrogen -- Vermiculate material -- Gas-phase; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2016.08.039
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Hydrogen production by gas-phase photocatalytic splitting of Hydrogen Sulphide (H2 S) was investigated on four semiconductor photocatalysts including CuGa1.6 Fe0.4 O2, ZnFe2 O3, (CdS + ZnS)/Fe2 O3 and Ce/TiO2 . The CdS and ZnS coated core shell particles (CdS + ZnS)/Fe2 O3 shows the highest rate of hydrogen (H2 ) production under optimized conditions. Packed bed tubular reactor was used to study the performance of prepared photocatalysts. Selection of the best packing material is a key for maximum removal efficiency. Cheap, lightweight and easily adsorbing vermiculate materials were used as a novel packing material and were found to be effective in splitting H2 S. Effect of various operating parameters like flow rate, sulphide concentration, catalyst dosage, light irradiation were tested and optimized for maximum H2 conversion of 92% from industrial waste H2 S. Highlights: CuGa1.6 Fe0.4 O4, ZnFe2 O3, (CdS + ZnS)/Fe2 O3, CeTiO2 photocatalysts were synthesized. Gas-phase packed bed tubular reactor was fabricated with novel packing material. (CdS + ZnS)/Fe2 O3 shows higher production rate and it was used for feasibility studies. With the best values of operating variables, the maximum conversion achieved was 92%.