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Systematic assessment of the influence of hydrogen peroxide dosage on caffeine degradation by the photo - fenton process / Evelyn Yamal-Turbay in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4770–4778 Titre : Systematic assessment of the influence of hydrogen peroxide dosage on caffeine degradation by the photo - fenton process Type de document : texte imprimé Auteurs : Evelyn Yamal-Turbay, Auteur ; Moisès Graells, Auteur ; Montserrat Pérez-Moya, Auteur Année de publication : 2012 Article en page(s) : pp. 4770–4778 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydrogen  peroxide  Photo  fnton  process Résumé : Caffeine degradation performance via photo-Fenton treatment was investigated under different dosage conditions. Experiments were planned according to a design of experiments to characterize hydrogen peroxide dosage protocols. Fenton reagent loads were first determined after a preliminary study. The addition of a fixed hydrogen peroxide load was controlled by an initial load fraction and the span of the continuous flow producing the total load. The experiments were carried out using 12 L solution samples of commercial coffee (300 mg L–1, approximately 17 mg L–1 of caffeine). Hence, HPLC data revealed that all treatments completely removed caffeine from samples, while TOC monitoring revealed reductions of up to 70%. Using reaction conversion as a performance index, the methodological approach presented enabled a comparison of dosage protocols and determination of those producing enhanced results. For the particular case addressed, the operation scheme that most increased treatment performance produced a conversion which was 25% higher than that obtained without dosage. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202256k [article] Systematic assessment of the influence of hydrogen peroxide dosage on caffeine degradation by the photo - fenton process [texte imprimé] / Evelyn Yamal-Turbay, Auteur ; Moisès Graells, Auteur ; Montserrat Pérez-Moya, Auteur . - 2012 . - pp. 4770–4778. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4770–4778 Mots-clés : Hydrogen  peroxide  Photo  fnton  process Résumé : Caffeine degradation performance via photo-Fenton treatment was investigated under different dosage conditions. Experiments were planned according to a design of experiments to characterize hydrogen peroxide dosage protocols. Fenton reagent loads were first determined after a preliminary study. The addition of a fixed hydrogen peroxide load was controlled by an initial load fraction and the span of the continuous flow producing the total load. The experiments were carried out using 12 L solution samples of commercial coffee (300 mg L–1, approximately 17 mg L–1 of caffeine). Hence, HPLC data revealed that all treatments completely removed caffeine from samples, while TOC monitoring revealed reductions of up to 70%. Using reaction conversion as a performance index, the methodological approach presented enabled a comparison of dosage protocols and determination of those producing enhanced results. For the particular case addressed, the operation scheme that most increased treatment performance produced a conversion which was 25% higher than that obtained without dosage. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202256k