Blending of Isobutanol with Diesel
- Blogs
- September 13, 2025
Syllabus: GS3/Environment
Context
- The Union Minister for Road Transport and Highways, Nitin Gadkari, recently announced that the Automotive Research Association of India (ARAI) is conducting trials to assess the feasibility of blending 10% isobutanol with diesel.
About the Development
- Earlier trials of blending ethanol with diesel proved unsuccessful.
- Consequently, isobutanol has emerged as a potential alternative for blending with diesel in India.
- Ongoing trials with isobutanol are expected to gradually raise blending levels in the coming months.
Isobutanol
- Nature: An alcoholic compound with flammable properties.
- Industrial Use: Widely used as a solvent in paints, coatings, and other sectors.
- Energy Potential: Offers advantages in blending with diesel due to better miscibility and stability compared to ethanol.
Ethanol Blending in India
- Concept: Ethanol blending refers to mixing ethanol with gasoline (petrol) to produce blended fuel for internal combustion engines.
Feedstocks:
- Sugary sources: sugarcane, molasses, sugar beet, sweet sorghum.
- Starchy sources: broken rice, maize, cassava.
- Policy Framework:
- National Policy on Biofuels (2018) set an indicative target of 20% ethanol blending in petrol by 2030.
- Given rapid progress and government support since 2014, the target was advanced to 2025–26.
Current Status & Future Outlook
- Achievement: India has already achieved 20% ethanol blending in petrol.
- Next Frontier: Focus is shifting towards:
- Blending isobutanol with diesel.
- Using ethanol for sustainable aviation fuel (SAF) production, aligning with India’s green energy and net-zero vision.