Journal of the Chemical Society - Faraday Transactions p. 1801 - 1806 (1991)
Update date:2022-08-15
Topics:
Okuhara, Toshio
Kyomasu, Ayumi
Misono, Makoto
The effects of Ru dispersion (or particle size) and residual Cl of Ru/Al2O3 on the catalytic activity and the selectivity for the cyclohexane conversion in the presence of hydrogen were investigated.In the case of Cl-free Ru/Al2O3 prepared from Ru3(CO)12, the turnover frequency (TOF) of hydrogenolysis was greater for higher Ru dispersion, and that of dehydrogenation was nearly independent of the dispersion, where TOF was calculated on the basis of H2 adsorption, i.e. the selectivity depends on the Ru dispersion.For Cl-containing Ru/Al2O3 catalysts, which were obtained from RuCl3 or by the addition of Cl to the Cl-free Ru/Al2O3, the dispersion-TOF correlations were different from those of the Cl-free Ru/Al2O3.Consequently, the selectivity oppositely depended on the Ru dispersion for the Cl-free and the Cl-containing Ru/Al2O3.The dispersion and the residual Cl were the crucial factors controlling the activity and selectivity, and these effects were differentiated.
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Doi:10.1021/acs.joc.9b03407
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