@Aarti & Respected sugar mandali babas !! 
With the government now flirting with isobutanol blending in diesel , I’m curious about the possible production trajectory of isobutanol in India.
Broadly, there are two main routes:
- Sugar/ethanol pathway : fermentation from molasses/juice/syrup > catalytic upgrading
- Petrochemical route: propylene-based
I’ve read that some proprietary technologies already exist for making isobutanol from sugary feedstocks.
But given how ethanol is tightly regulated (pricing, allocation, govt approvals, etc.), do you think isobutanol scaling (if diesel blending is pushed seriously) will actually come from the sugar-molasses side, or will the propylene/petrochemical guys end up winning?
In short: Under current regulatory + economic reality, which feedstock do you see as the more practical production base for large-scale isobutanol in India — sugar or propylene?