Selective synthesis of acetone from isopropyl alcohol over active and stable CuO–NiO nanocomposites at relatively low-temperature

Figures & data

Fig. 1 Variation of log σ with the % mixing of NiO for CuO–NiO nanocomposites calcined at 400–700 °C (a) without isopropyl alcohol, and (b) with isopropyl alcohol.

Fig. 2 Variation of log σ versus 1/T for (a) pure CuO, (b) pure NiO, and (c) CuO mixed with 30 wt.% NiO, nanocomposites calcined at 400 °C.

Table 1 Activation energy values (with and without IPA) for pure CuO, pure NiO and CuO mixed with 30 wt.% NiO nanocomposites calcined at 400 °C.

Catalyst	ΔEσ (eV)
	Without IPA	With IPA
Pure CuO	0.83	0.79
CuO mixed with 30 wt.% NiO	0.12	0.03
Pure NiO	0.50	0.40

IPA: Isopropyl alcohol.

Fig. 3 Effect of acetic acid injections on the catalytic conversion of IPA to acetone over (a) pure NiO, (b) pure CuO and (c) CuO mixed with 30 wt.% NiO nanocomposites calcined at 400 °C.

Fig. 4 Activity variation of IPA with reaction time over presaturated catalysts with acetic acid, (a) pure NiO, (b) pure CuO and (c) CuO mixed with 30 wt.% NiO nanocomposites calcined at 400 °C.

Fig. 5 (a) Variation of IPA conversion with the % mixing of NiO for CuO–NiO nanocomposite catalysts calcined at 400–700 °C, (b) effect of reaction temperature, and (c) effect of reaction time on the catalytic dehydrogenation of IPA over CuO mixed with 30 wt.% NiO nanocomposites calcined at 400 °C.