Wet Air Oxidation of Organic Acids and Phenol for Odour Control Processes | Sciact - CRIS-system of Boreskov Institute of Catalysis

Wet Air Oxidation of Organic Acids and Phenol for Odour Control Processes Full article

Conference

3rd International Conference on Environmental Odour Monitoring and Control (NOSE2012)
23-26 Sep 2012 , Palermo

Journal

Chemical Engineering Transactions
ISSN: 1974-9791

Output data

Year: 2012, Volume: 30, Pages: 277-282 Pages count : 6 DOI: 10.3303/CET1230047

Tags

Acetic acid; Batch reactors; Carbon; Catalyst activity; Catalysts; Catalytic oxidation; Chemical reactors; Chemicals removal (water treatment); Odor control; Organic acids; Organic carbon; Oxidation; pH; Phenols; Recycling; Solutions; Water pollutionWater treatment

Authors

Dobrynkin Nikolay M. ¹ , Batygina Marina V. ¹ , Noskov Aleksandr S. ¹ , Besson Michele ² , Gallezot Pierre ²

Affiliations

1	Boreskov Institute of Catalysis of Siberian Branch of Russian Academy of Sciences, Pr. Ak. Lavrentieva, 5, Novosibirsk-90, 630090, Russia
2	Institut de Recherches sur la Catalyse et l’environnement de Lyon (IRCELYON, UMR 5256 CNRS – Université de Lyon, 2, Avenue Albert Einstein, 69626, Villeurbanne, France

The treatment of odorous pollutants by catalytic wet air oxidation (CWAO) was investigated for model water solutions of different organic acids, such as acetic, succinic and p-hydroxybenzoic acids, and phenol. CWAO reactions of phenol and acetic acid runs were carried out in a continuous micropilot trickle-bed reactor for about 300 h. Experiments were performed with carbon-supported catalysts PZ-65 (0.6 % Ru+5 % CeO2/ Sibunit), PZ-68 (0.6 %Ru + 8 % CeO2/ Sibunit) and carbon material Sibunit-4 at 180 °C for phenol oxidation and at 200 °C for acetic acid oxidation at 50 bar air total pressure. The treated solution was periodically analyzed, collected and submitted to a recycling run. Total organic carbon content (TOC), inorganic carbon content (IC) and concentrations of separate organic substances Ci were analyzed by means of a TOC-meter and an HPLC. The CWAO of succinic and p-hydroxybenzoic acids have been investigated in a batch reactor at 140 °C and 50 bar air total pressure. All catalysts were rather active in oxidation of phenol and the activity was found very stable in all cases. No deactivation was observed. After several sets of recycling of treated solutions on catalyst PZ-68, the oxidation activity measured on a fresh phenol solution was found similar to the initial activity. CWAO experiments with acetic acid have shown that Sibunit catalyst did not exhibit catalytic activity up to temperature of 225 °C, whereas the promoted Ru-CeO2/Sibunit catalysts exhibited high activity at 200 °C; however, their activity decreased significantly as a function of time on stream after 100 h. Transmission electron microscopic (TEM) investigations of (Ru+CeO2)/Sibunit catalysts have shown that 1nm-large Ru-particles are associated with 5 nm-large CeO2 particles supported on the carbon surface. This association is probably very beneficial to the activity of the catalyst. The results of study have demonstrated that CWAO over Ru-carbon supported catalysts may a suitable technique for degradation of diluted aqueous solutions of organic acids and odour control processes. The mineralization is complete, and a leaching of the metal by the water-organic solutions is most insignificant.

Dobrynkin N.M. , Batygina M.V. , Noskov A.S. , Besson M. , Gallezot P.
Wet Air Oxidation of Organic Acids and Phenol for Odour Control Processes
Chemical Engineering Transactions. 2012. V.30. P.277-282. DOI: 10.3303/CET1230047 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000319502000047
Scopus:	2-s2.0-84875252791
Elibrary:	21891666
OpenAlex:	W4388926042

DB	Citing
Web of science	3
Scopus	5
Elibrary	4