In recent news, India’s Prime Minister announced at the G20 Energy Ministers’ meeting that the country has rolled out the use of 20% ethanol-blended petrol in 2023 and aims to cover the entire country by 2025. This development is part of India’s initiative to reduce dependence on fossil fuels and promote sustainable energy solutions. In this regard, India’s ethanol production has diversified from cane molasses to feedstocks like rice, maize, and other grains.
Understanding Ethanol
Ethanol, also known as ethyl alcohol, is a biofuel produced from various sources such as sugarcane, corn, rice, wheat, and biomass. The production process involves fermenting sugars using yeasts or petrochemical methods such as ethylene hydration. Ethanol results in a 99.9% pure alcohol that can be blended with petrol, creating a cleaner fuel alternative besides being a fuel additive. Ethanol’s production yields valuable byproducts like Distillers’ Dried Grain with Solubles (DDGS) and Potash that find applications across various industries.
Byproducts of Ethanol Production
Some of the byproducts of ethanol production include DDGS and Potash from Incineration Boiler Ash. DDGS is the residue left after the starch in grains is fermented, and ethanol is extracted. This byproduct is a valuable animal feed supplement due to its high protein content. On the other hand, after Ethanol Production in the boiler, the remaining ash contains up to 28% potash. This ash can be utilized as a fertilizer as it is a rich source of potash.
Applications of Ethanol as Fuel
Ethanol serves as a renewable and sustainable biofuel alternative to gasoline in the transportation sector. It can be blended with petrol in varying proportions such as E10 (10% ethanol, 90% petrol) and E20 (20% ethanol, 80% petrol). To promote the use of ethanol as a renewable fuel, the Indian government implemented the Ethanol Blending Programme. This program aims to reduce the country’s dependence on imported crude oil, decrease carbon emissions, and boost farmers’ incomes.
Diversification of Feedstocks in India
Initially, India’s ethanol production mainly relied on ‘C-heavy’ molasses. However, the country diversified its feedstocks by including rice, damaged grains, maize, jowar, bajra, and millets. Leading sugar companies installed distilleries that can operate on multiple feedstocks throughout the year. To incentivize the use of alternative feedstocks, the government implemented a differential pricing policy.
However, using grains to yield more ethanol requires longer processing time. There’s also quality variability of feedstocks affecting production and environmental issues related to non-traditional feedstocks.
Types of Molasses
Various types of molasses include A Molasses (First Molasses), B Molasses (Second Molasses), and C Molasses (Final Molasses, Blackstrap Molasses, Treacle), each differing in their dry matter content, sugar content, and commercial uses.
Government Initiatives to Promote Ethanol Blending in India
Several initiatives have been undertaken by the Indian government to promote ethanol blending, including the National Policy on Biofuels 2018, the E100 Pilot project, Pradhan Mantri JI-VAN Yojana 2019, and the Repurpose Used Cooking Oil (RUCO) initiative. These efforts aim to enhance the production and use of biofuels in the country.
Last Modified: February 22, 2024