From Sugarcane to Grains: The Evolution of India's Ethanol Blended Petrol Roadmap

India's ethanol blending programme mixes ethanol with petrol to reduce oil imports, support farmers and cut emissions, and is being rapidly scaled from E10 towards E20 by 2025-26 under a detailed policy roadmap. This involves regulated procurement of ethanol from multiple feedstocks (sugarcane-based and grain-based), dedicated blending and storage infrastructure, and phased rollout of higher blends for compatible vehicles.

What Ethanol Blending Means
Ethanol blending is the practice of mixing a specified percentage of ethanol with petrol to produce blended automotive fuel such as E10 (10% ethanol) or E20 (20% ethanol). In India, this is done primarily to reduce vehicle emissions and lower the country's dependence on imported crude oil used to produce petrol.

Ethanol used in blending is a renewable fuel, and in India it has historically been produced mainly from sugarcane molasses, with an increasing share now coming from grains and other feedstocks.

Origins and evolution in India
India began experimenting with ethanol blending around 2001, and the Ethanol Blended Petrol (EBP) Programme was formally launched in January 2003. Initially, the government mandated 5% ethanol blending (E5) in petrol in selected states and union territories in 2003, expanding this to an all‑India mandate (with some regional exceptions) in 2006.

In 2015, the Ministry of Petroleum and Natural Gas asked oil marketing companies (OMCs) to target 10% blending in as many states as possible, setting the stage for the later national E10 and E20 targets. These early phases highlighted supply constraints and pricing issues, which shaped later policy reforms and capacity expansion.

Policy framework and targets
The National Policy on Biofuels 2018 originally set a target of 20% ethanol blending in petrol by 2030. Following recommendations and a detailed roadmap prepared by NITI Aayog and the Ministry of Petroleum and Natural Gas, this target was advanced to 2025.

Subsequently, the policy was amended in 2022 to formally advance the 20% blending target to the Ethanol Supply Year (ESY) 2025-26, and government press releases reiterate this as the official goal. The roadmap envisages nationwide availability of E10 fuel by around 2022 and phased rollout of E20 starting in 2023 to achieve full availability by 2025.

Institutional and operational setup
The EBP Programme is implemented by the Ministry of Petroleum and Natural Gas, with public sector oil marketing companies (OMCs) responsible for procuring ethanol and selling blended petrol. A "Long Term Ethanol Procurement Policy" issued in 2019 sets out pricing and offtake arrangements, providing certainty to producers and encouraging investment in distillation capacity.

Ethanol blending is implemented across the country, except in certain island territories such as Andaman & Nicobar and Lakshadweep where logistical and infrastructure constraints exist. Coordination with the Department of Food and Public Distribution and other ministries helps ensure feedstock availability and financial support to sugar and grain-based distilleries.

Feedstocks and production pathways
Traditionally, ethanol for blending in India has come from sugarcane molasses, a by‑product of sugar production. Over time, policy reforms have permitted ethanol production from multiple feedstocks including B‑heavy and C‑heavy molasses, sugarcane juice, damaged food grains, surplus rice, and maize to diversify supply and reduce reliance on a single crop.

The government has introduced interest subvention schemes and financial assistance to sugar mills and distilleries to expand or convert plants into multi‑feedstock units capable of producing ethanol from both molasses and grains. These measures aim to overcome capacity constraints identified as a major bottleneck for achieving higher blending targets.

Blending levels and current status
Under the EBP Programme, average blending rose from about 5% in ESY 2018-19, with OMCs procuring around 188.6 crore litres of ethanol, up from 38 crore litres in ESY 2013-14. The government initially set a target of 7% blending for ESY 2019-20 and 10% for ESY 2021-22, as part of the progression towards nationwide E10.

According to recent official updates, India has achieved blending levels around the mid‑teens and is pushing towards 20% in line with the advanced ESY 2025-26 target, though the exact latest percentage varies across states depending on supply and infrastructure. The rollout of higher blends is phased, beginning with ethanol‑surplus states and expanding as production and logistics improve.

How blending is physically done
In operational terms, ethanol produced at distilleries is transported-by road, rail, or pipelines where available-to blending depots operated by OMCs. At these depots, ethanol is stored in dedicated tanks and blended with petrol using calibrated equipment to achieve the specified blend percentage (such as E10 or E20) before distribution to retail outlets.

Blended petrol is then supplied to fuel stations, where it is sold like conventional petrol, although higher blends such as E20 may be labelled to inform consumers and ensure use in compatible vehicles. Infrastructure upgrades, including additional storage and handling facilities, are being undertaken to manage larger volumes and higher blends safely.

Economic and environmental rationale
Ethanol blending is expected to reduce India's crude oil import bill by substituting part of petrol demand with domestically produced ethanol. It also provides an additional revenue stream for farmers (particularly sugarcane and grain producers) and aids in clearing surplus stock, which can stabilise agricultural markets and support rural incomes.

From an environmental perspective, ethanol has a cleaner combustion profile than petrol, contributing to lower tailpipe emissions of carbon monoxide, hydrocarbons, and in lifecycle terms, reduced net carbon dioxide emissions, depending on feedstock and production methods. The NITI Aayog roadmap highlights ethanol blending as part of a broader decarbonisation and energy security strategy for the transport sector.

Key challenges and concerns
Despite progress, the programme faces challenges in ensuring sustainable feedstock supply without undermining food security, particularly when grains and surplus rice are used. Water use and environmental impacts of intensive sugarcane cultivation, a major ethanol feedstock, are also concerns in water‑stressed regions.

Another challenge lies in vehicle compatibility and consumer awareness when moving from E10 to E20, as higher blends can affect fuel systems and performance in vehicles not designed for them. The roadmap therefore calls for a phased rollout, continued availability of lower blends for older vehicles, and clear standards and labelling for OEMs and consumers.

A typical blending chain might involve a sugar mill in a cane‑growing state converting molasses into ethanol, which is then transported by rail tanker to a nearby OMC depot, blended with petrol to produce E10, and distributed to retail outlets for sale to motorists. As E20 rollout advances, the same chain will involve higher volumes and possibly dedicated E20 storage and dispensing infrastructure in selected regions, alongside continued supply of E10 or regular petrol for legacy vehicles.