Oxidation of organic substances in aqueous solutions over Ru catalysts by oxygen.pdf

Advances in Environmental Research 4Ž. 2000 123᎐132
Oxidation anic substances in aqueous solutions
over Ru catalysts by oxygen
Marina V. Batygina, Nikolay M. Dobrynkin, Aleksander S. NoskovU
Boresko¨ Institute of Catalysis of Siberian Branch of Russian Academy of Sciences, Pr. Ak. La¨rentie¨a, 5, No¨osibirsk-90,
630090, Russia
Accepted 27 March 2000
Abstract
The catalytic performance of supported Ru catalysts has been studied in the reactions of wet oxidation of
acetonitrile, N,N-dimethyl formamide and carbamide at Ts433᎐533 K and ᎐ MPa, and wet oxidation of
real sewage from an alcohol plantŽ. so-called Luther water at Ts403᎐473 K and ᎐ MPa. The Luther
᎐
water contained a mixture of low-boilingŽ. C15C aldehydes and alcohols. The experiments were carried out in a
perfectly mixed batch autoclave reactor. The conversion of alcohols and aldehydes contained in the Luther water and
selectivity of the process towards CO2 and water as well as the selectivity of the oxidation of acetonitrile,
N,N-dimethyl formamide and carbamide towards CO22 , N and water were determined at various temperatures and
reaction times. RuŽ. wt.% rgraphite-like carbon was effective in the oxidation of Luther water Ž⌬% at
s .Žs s s .
T 423 K for 1 h , carbamide XCOŽNH2 .2 100%, SCOŽNH2 .2 ªCO2 100%, SCOŽNH2 .2 ªN2 71% at 473 K, 2 h and
s s r r␥
acet