However, all the above PO production technologies consume petrochemically-derived propylene (Scheme 1(a)). As the supply and price of oil show an unstable tendency, daily exhaustion of petroleum resource calls for the chemical production from alternative resources. With the rapid development of the bio-diesel industry, glycerol of renewable origin, as a by-product of bio-diesel production, seems to be an attractive option as a new feedstock. Glycerol is known to ...