Supporting information

Hydrogenolysis of bioglycerol to 1,2-propanediol over Ru/CeO2catalysts: influence of CeO2characteristics on catalytic performance

GangadharaRaju, Damma Devaiah, PadigapatiS. Reddy, KomateediN. Rao, BenjaramM. Reddy*

Inorganic and Physical Chemistry Division, CSIR – Indian Institute of Chemical Technology, Uppal Road, Hyderabad – 500 007, India

Figure S1. XRD pattern of hydrothermally synthesized CeO2 supported Ru samples with Ru loadings from 1 to 7 wt.% (# – RuO2).

Figure S2. Ce 3d XP spectra of various CeO2 supported Ru samples.

Figure S3. SEM images of various CeO2 supported Ru samples.

Figure S4.DeconvolutedNH3-TPD profiles of various CeO2 supported Ru samples.

Table S1. The percentage distribution of acid sites (after deconvolution)of CeO2 supported Ru samples

Peak / Catalyst
3RCHT / 3RCU / 3RCU
α / 1.00 / 1.00 / 1.00
β / 0.25 / 0.33 / 0.18
γ / 0.89 / 0.70 / 0.42

Table S2. Effect of reaction temperature on glycerol hydrogenolysis. Catalyst 3RCHT, reaction conditions: 50 mL of 20% aqueous glycerol solution, 6 MPa pressure, 1 g catalyst, and 12 h reaction time.

Temperature (°C) / Glycerol
Conversion (%) / Selectivity (%) / Yield
(1,2-PDO)
1,2-PDO / Ethylene glycol / Othersb
180 / 22.7 / 57.1 / 7.3 / 35.5 / 12.9
190 / 36.3 / 59.2 / 5.2 / 35.5 / 17.8
200 / 72.7 / 65.0 / 5.2 / 28.8 / 47.9
220 / 100 / 57.7 / 8.1 / 34.0 / 57.7

bOthers = 1-propanol, 2-propanol, methanol and ethanol.

Table S3. Effect of pressure on glycerol hydrogenolysis. Catalyst 3RCHT, reaction conditions: 50 mL of 20% aqueous glycerol solution, 1 g catalyst, 200 °C reaction temperature, and12 h reaction time.

Pressure (MPa) / Glycerol
Conversion (%) / Selectivity (%) / Yield
(1,2-PDO)
1,2-PDO / Ethylene glycol / Othersb
4 / 18.0 / 53.1 / 1.0 / 45.9 / 9.5
5 / 43.3 / 53.2 / 4.9 / 41.9 / 23.0
6 / 72.7 / 65.0 / 5.2 / 28.8 / 47.9
8 / 83.9 / 58.2 / 2.9 / 38.9 / 48.8

bOthers = 1-propanol, 2-propanol, methanol and ethanol.

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