Table 1 Conversion, selectivity and turnover frequencies of n-hexane hydrogenolysis predicted by the microkinetic CSTR model for the Zr(O)2/m-ZrO2 active site with respect to the effective residence timea

From: Ultrasmall amorphous zirconia nanoparticles catalyse polyolefin hydrogenolysis

Effective residence time (α × τ) (s)

Conversion (%)

Selectivity (%)

Turnover frequency (s–1)b

Hexene

Propane

Propene

Initial

100

3 × 10–2

3 × 10–2

4 × 10–1

10–6

6 × 10–6

98

2

1 × 10–1

6 × 10–3

10–4

3 × 10–5

42

58

4 × 10–2

2 × 10–4

10–2

1 × 10–3

9 × 10–1

99

7 × 10–4

1 × 10–4

1

1 × 10–1

9 × 10–3

100

8 × 10–6

1 × 10–4

102

12

9 × 10–5

100

2 × 10–6

1 × 10–4

104

94

9 × 10–7

100

1 × 10–6

9 × 10–6

  1. a(T = 300 °C; \(P_{{\rm{H}}_{2}}\) = 1 MPa; Phexane = 0.1 MPa).
  2. bThe expected turnover frequency uncertainties are 2–3 orders of magnitude due to the expected DFT uncertainties of 0.2–0.3 eV.