If the first phase of India’s biofuel journey was defined by ethanol, the next phase will be shaped by a broader set of molecules designed to address more complex segments of the energy economy—particularly diesel.
Unlike petrol, where ethanol has found a natural fit, diesel requires fuels that can integrate seamlessly into existing engines and infrastructure while maintaining fuel characteristics. This has brought renewed focus on advanced alcohols such as bio-isobutanol, which offer a closer alignment with diesel properties.
From a technical standpoint, the case is compelling. Compared to ethanol, bio-isobutanol offers higher energy density, improved miscibility without the need for an external agent, and better compatibility with diesel engines—positioning it as a more viable candidate for large-scale adoption in the diesel pool.
