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Photocatalytic treatment of IGCC power station effluents in a UV-pilot plant.
J Hazard Mater. 2009 Aug 15; 167(1-3):885-91.JH

Abstract

The aim of this work is to improve the quality of water effluents coming from an Integrated Gasification Combined Cycle (IGCC) power station to meet with future environmental legislation. This study has been made using an homogeneous photocatalytic oxidation process (UV/Fe(II)/H(2)O(2)) in a pilot plant. The efficiency of the process was determined from the analysis of the following parameters: cyanides, formates and TOC content. In the first stage, a factorial experimental design allowed to determine the influence of operation variables (initial concentration of H(2)O(2) and Fe(II), pH and temperature) on the degradation kinetics. pH was always kept in a value >9.5 during cyanides destruction to avoid gaseous HCN formation and lowered later to enhance formates degradation. Experimental kinetic constants were fitted using neural networks (NNs). Under the optimum conditions ([H(2)O(2)]=1700 ppm, [Fe(II)]=2 ppm, pH 2 after cyanides destruction, and T=30 degrees C), it is possible to degrade 100% of cyanides in 15 min and 76% of formates in 120 min. The use of an homogeneous process with UV light can offer an economical and practical alternative to heterogeneous photocatalysis for the destruction of environmental pollutants present in thermoelectric power stations effluents, since it can treat very high flowrates using a lower H(2)O(2) concentration. Furthermore, it does not require additional operations to recover the solid catalyst and regenerate it due to deactivation as occurs in heterogeneous catalysis.

Authors+Show Affiliations

Grupo IMAES, Department of Chemical Engineering, Escuela Técnica Superior de Ingenieros Industriales, University of Castilla-La Mancha, Avenida Camilo José Cela 3, Ciudad Real, Spain. Antonio.Duran@uclm.esNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19232825

Citation

Durán, A, et al. "Photocatalytic Treatment of IGCC Power Station Effluents in a UV-pilot Plant." Journal of Hazardous Materials, vol. 167, no. 1-3, 2009, pp. 885-91.
Durán A, Monteagudo JM, San Martín I, et al. Photocatalytic treatment of IGCC power station effluents in a UV-pilot plant. J Hazard Mater. 2009;167(1-3):885-91.
Durán, A., Monteagudo, J. M., San Martín, I., & Sánchez-Romero, R. (2009). Photocatalytic treatment of IGCC power station effluents in a UV-pilot plant. Journal of Hazardous Materials, 167(1-3), 885-91. https://doi.org/10.1016/j.jhazmat.2009.01.072
Durán A, et al. Photocatalytic Treatment of IGCC Power Station Effluents in a UV-pilot Plant. J Hazard Mater. 2009 Aug 15;167(1-3):885-91. PubMed PMID: 19232825.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photocatalytic treatment of IGCC power station effluents in a UV-pilot plant. AU - Durán,A, AU - Monteagudo,J M, AU - San Martín,I, AU - Sánchez-Romero,R, Y1 - 2009/02/18/ PY - 2008/10/23/received PY - 2009/01/20/revised PY - 2009/01/20/accepted PY - 2009/2/24/entrez PY - 2009/2/24/pubmed PY - 2009/12/16/medline SP - 885 EP - 91 JF - Journal of hazardous materials JO - J Hazard Mater VL - 167 IS - 1-3 N2 - The aim of this work is to improve the quality of water effluents coming from an Integrated Gasification Combined Cycle (IGCC) power station to meet with future environmental legislation. This study has been made using an homogeneous photocatalytic oxidation process (UV/Fe(II)/H(2)O(2)) in a pilot plant. The efficiency of the process was determined from the analysis of the following parameters: cyanides, formates and TOC content. In the first stage, a factorial experimental design allowed to determine the influence of operation variables (initial concentration of H(2)O(2) and Fe(II), pH and temperature) on the degradation kinetics. pH was always kept in a value >9.5 during cyanides destruction to avoid gaseous HCN formation and lowered later to enhance formates degradation. Experimental kinetic constants were fitted using neural networks (NNs). Under the optimum conditions ([H(2)O(2)]=1700 ppm, [Fe(II)]=2 ppm, pH 2 after cyanides destruction, and T=30 degrees C), it is possible to degrade 100% of cyanides in 15 min and 76% of formates in 120 min. The use of an homogeneous process with UV light can offer an economical and practical alternative to heterogeneous photocatalysis for the destruction of environmental pollutants present in thermoelectric power stations effluents, since it can treat very high flowrates using a lower H(2)O(2) concentration. Furthermore, it does not require additional operations to recover the solid catalyst and regenerate it due to deactivation as occurs in heterogeneous catalysis. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19232825/Photocatalytic_treatment_of_IGCC_power_station_effluents_in_a_UV_pilot_plant_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00109-5 DB - PRIME DP - Unbound Medicine ER -