Naslov
Process intensification in phenolic wastewater treatment

Autori
Wittine, Ozren ; Keav, Sylvain ; Barbier jr*, Jacques ; Maduna Valkaj, Karolina ; Zrnčević, Stanka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
8th European Congress of Chemical Engineering / - , 2011

Skup
8th European Congress of Chemical Engineering

Mjesto i datum
Berlin, Njemačka, 25.09.2011. - 29.09.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wastewater treatment; CWAO; CWPO; PP-CWAO; zeolite; phenol

Sažetak
Water pollution is characterized mainly by the volume of waste to be treated and by the nature, concentration and toxicity of pollutants that form it. These parameters are all factors that have to be taken into account when choosing the treatment method to use. WAO (Wet Air Oxidation) is a phenol oxidation treatment method based on oxidation with air or oxygen, and is conducted at elevated temperatures (373-573 K) and pressures (1 - 20 MPa). With addition of homogeneous or heterogeneous catalysts, WO processes can be carried out at lower pressures and temperatures. If these processes use hydrogen peroxide as oxidizing agent, the process is called CWPO (Catalytic Wet Peroxide Oxidation), in which treatment is carried out at atmospheric pressure and temperatures below 373 K. To take advantages of the CWPO & CWAO process, and maximize the effectiveness of treatment, in this work, mixture of both oxidants (oxygen and hydrogen peroxide) was used. Activity of synthesized Cu/13X catalyst was tested in the PP-CWAO (Peroxide Promoted Catalytic Wet Air Oxidation) reaction using batch reactor. The catalysts were characterized by different methods (XRD, AAS, BET surface area). The catalytic tests were carried out in a stainless steel Parr reactor in batch operation mode at the constant catalyst mass (0.1 g / 200 cm-3), different temperatures (333 - 353K) and air pressures (2 - 20 bar). The initial concentration of phenol was 0.01 mol dm-3 while the concentration of hydrogen peroxide varied from 0.01 mol dm-3 to 0.14 mol dm-3. Based on the results it has been concluded that PP-CWAO process is more efficient than classical CWAO and CWPO processes.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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