Context:
India has successfully achieved its E20 target 20% ethanol blended with petrol by early 2025, well ahead of its 2025–26 target. This milestone under the Ethanol Blended Petrol (EBP) Programme marks a significant stride towards cleaner fuels and energy self-reliance. However, it has also raised technical, consumer, and infrastructural concerns that merit urgent attention.
What is Ethanol Blending?
Ethanol blending involves mixing ethanol, a biofuel derived from biomass (sugarcane, maize, rice, etc.), with petrol in varying proportions—such as E10 (10%), E20 (20%), or higher blends.
Advantages
- Cuts GHG emissions and urban air pollution.
- Reduces import dependency and saves foreign exchange.
- Supports agro-industries and rural incomes.
India’s Ethanol Blending Journey
- EBP Programme launched: 2003.
- E10 target achieved: 2022.
- E20 achieved: March 2025.
- Next milestone: E30 blending by 2030.
Supporting Policy Framework
- National Policy on Biofuels (2018): Allowed diverse feedstocks, including sugarcane juice, FCI surplus grains, rotten potatoes, etc.
- Price & Tax Incentives:
- Fixed ethanol prices by OMCs for supply certainty.
- GST reduction from 18% to 5%.
- Capital support and interest subvention for ethanol distilleries.
- Infrastructure Push:
- PM-JI-VAN promotes 2G ethanol from rice straw and agri-residues.
- Global Role:
- India leads the Global Biofuels Alliance (GBA) to harmonise standards and cooperation globally.
Technical and Environmental Concerns
- Engine Corrosion & Material Degradation:
- Ethanol is hygroscopic (absorbs water), which increases internal moisture, leading to corrosion of metal parts, degradation of rubber/plastic components, and fuel system clogging due to residue loosening.
- Reduced Fuel Efficiency:
- Ethanol has lower energy density than petrol. This leads to a mileage drop, raising consumer costs per kilometer without a matching drop in fuel prices.
- Vehicle Compatibility Issues:
- Most existing vehicles in India are designed for E10. Lack of widespread flex-fuel vehicles or retrofit guidelines makes higher blends (E20+) unsuitable for the majority fleet, especially two-wheelers.
- Cold Start & Engine Performance Problems:
- Ethanol-rich blends have lower volatility and higher ignition temperatures, causing difficulty in starting vehicles in colder climates, rough idling, and sluggish engine response in older engines.
Systemic Gaps
- Auto Industry (SIAM): Seeks regulatory clarity and incentives for E20+ compatible engines.
- Fuel Retailers: Need upgraded storage, pumps, and pipelines for ethanol-blended fuels.
- Feedstock Concerns:
- Over-reliance on sugarcane and maize risks food security.
- Scaling up 2G bioethanol (from crop waste) is vital.
