OP-II-3

PP-III-63be the most efficient of catalysts studied; however its activity in the hydrogenation ofOH groups and double bonds was less than that of CuCr 2 O 4 sample.(Cu,H) 2 [Si 2 O 5 ](OH) 4 catalyst was found to be much less active in comparison to thepatterns of CuCr 2 O 4 and (Сu,Zn)O.There is some correlation of catalytic properties of investigated catalysts and dataon kinetics of its reduction.The results showed [2,3] that copper ions reduction of CuCr 2 O 4 and (Сu,Zn)Ocatalysts occurs without removal of lattice О 2– anion according to the reaction Cu 2+ +H 2 Cu 0 + 2H + abs. The generated protons are absorbed by the oxide structure in theform of ОН -and НОН groups. (Cu,H) 2 [Si 2 O 5 ](OH) 4 catalyst reduction occursaccording to traditional mechanism with water formation.Kinetics parameters of copper cations reduction was calculated according toOzawa-Flynn-Wall method using experimental thermal curves DSC of reduction inhydrogen. The results presented in Table 1 reveal that activation energy of reductionof just calcined at 250-350°C catalysts CuCr 2 O 4 and (Сu,Zn)O in 2-3 time highercomparing to other investigated catalysts.Table 1. Kinetic parameters of copper cations reduction in hydrogen. Two values correspondto parameters at low conversion (~ 10 %) and high conversion (~ 80 %) of copper.Sample Ea, kJ/mole log(k 0(sec -1 )) supposed mechanism(Cu,H) 2 [Si 2 O 5 ](OH) 4. nH2 O 47 → 41 2.2 → 5.2Cu 0.08 Zn 0.92 O (air exposed) 46 → 64 2.1 → 2.6Cu 0.08 Zn 0.92 O(just calcined) 100 → 130 10.3 → 14.5CuCr 2 O 4 99 → 121 -With О 2- removing and waterformationWith H + absorption in theform of OH - и НОН groupsin oxide structureThe results of investigation of catalytic and physicochemical properties of coppercontaining catalysts may allow us to create bicatalytic permeable composite monolithto combine best activity in reaction of hydrogenolysis of ester groups with bestactivity in the reaction of hydrogenation of fatty acids and double bonds to producefatty alcohols and hydrocarbons from vegetable oils.[1]. T.M.Yurieva, et al., Mater. Res. Innov., 5 (2), 74-80, (2001).[2]. A.A. Khassin, et al., VIII Int. Conf. on Mechanisms of Catal. React. (MCR-VIII), 29 июня-2июля,2009, Novosibrisk.[3]. A.A. Khassin, et al., Physical Chemistry Chemical Physics, 11, 6090 – 6097, (2009).556