Sulphide removal from petroleum refinery wastewaters by catalytic oxidation

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Vítor Vilar (Author) FEUP; A. Bhatnagar (Author) Other; E. Kumar (Author) Other; Cidália Botelho (Author) FEUP; Rui Boaventura (Author) FEUP; C. E. Santo (Author) Other

Journal

Title: Desalination and Water Treatment

Vol. 46 No. 1-3

Pages: 256-263

ISSN: 1944-3994

Publisher: Desalination Publications

Indexing

ISI Web of Knowledge - 3 Citations

ISI Web of Science

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology > Environmental engineering

CORDIS: Technological sciences > Engineering > Process engineering

Associated Projects

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Other information

Authenticus ID: P-002-7T6

DOI: 10.1080/19443994.2012.677555

Abstract (EN): The catalytic oxidation of sulphides present in oil refinery wastewaters was investigated in the present study. The wastewaters were obtained from the wastewater treatment plant of the oil refinery in Matosinhos (Portugal), Galp Energia. Air, NaOCl and H2O2 were chosen as oxidants and Fe3+ and Mn2+ as the two catalysts to assess the effective combination of catalyst-oxidant for sulphide removal after oil separation in parallel plate interceptors. Primarily, air (oxygen) was used as the oxidant and the efficiency of two catalysts (Fe3+ and Mn2+) for sulphide removal was evaluated. Experimental data suggested that Fe3+ catalysed sulphide removal in the presence of oxygen was more effective than Mn2+ catalysed reaction. In a subsequent study, oxygen was replaced by NaOCl and H2O2, and the potential of various catalyst-oxidant combinations, NaOCl + [Fe3+], NaOCl + [Mn2+], H2O2 + [Fe3+], H2O2 + [Mn2+], was assessed. The NaOCl + [Fe3+] combination achieved the maximum sulphide oxidation. Pseudo-first-order and pseudo-second-order reaction models were fitted to the kinetic experimental data. The influence of temperature on the kinetic rate was also investigated.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8