K. Parida et Hk. Mishra, Catalytic ketonisation of acetic acid over modified zirconia - 1. Effect of alkali-metal cations as promoter, J MOL CAT A, 139(1), 1999, pp. 73-80
The catalytic ketonisation of acetic acid was studied over fifteen differen
t metal-doped zirconia samples. Among all, the catalytic aspects of alkali-
metal cation-promoted zirconia were extensively studied and found most effe
ctive for ketonisation of acetic acid. The reactions were performed in a fi
xed-bed reactor by varying the temperatures, flow rates of reactant and mol
e percent of alkali on the catalyst. Except Li, all the alkali-metal ions w
ere capable of enhancing the catalytic activity. Complete conversion with h
igh selectivity for acetone was observed in the temperature range of 623-69
8 K. Among all the alkali-metal-modified zirconia, sodium was the most effe
ctive promoter for ketonisation reaction. The observed activity order follo
wed Na > K > Cs > Li. (C) 1999 Elsevier Science B.V. All rights reserved.