Isobutanol
Kartavya Desk Staff
Source: TH
Context: The Automotive Research Association of India (ARAI) is conducting a pilot project to blend isobutanol with diesel, after ethanol–diesel blending failed.
About Isobutanol:
• What It Is?
• Isobutanol is a four-carbon alcohol (C4H10O), clear, flammable liquid with higher energy density than ethanol. Used as a solvent in paints, coatings, and now being explored as a biofuel blendstock for diesel engines.
• Isobutanol is a four-carbon alcohol (C4H10O), clear, flammable liquid with higher energy density than ethanol.
• Used as a solvent in paints, coatings, and now being explored as a biofuel blendstock for diesel engines.
• Formation Process:
• Produced by fermenting natural sugars (cane juice, molasses, grains) using genetically engineered microbes under sterile conditions. Requires fermentation tank retrofitting and distillation units to separate ethanol and isobutanol in sugar refineries.
• Produced by fermenting natural sugars (cane juice, molasses, grains) using genetically engineered microbes under sterile conditions.
• Requires fermentation tank retrofitting and distillation units to separate ethanol and isobutanol in sugar refineries.
• Blend with diesel to create a cleaner-burning fuel, reduce crude oil imports, and contribute to net-zero 2070 goals. Provide new avenue for surplus ethanol feedstock utilization, supporting sugar sector viability.
• Blend with diesel to create a cleaner-burning fuel, reduce crude oil imports, and contribute to net-zero 2070 goals.
• Provide new avenue for surplus ethanol feedstock utilization, supporting sugar sector viability.
• Key Features:
• Higher Flash Point: Safer than ethanol for diesel blending as it is less volatile and reduces fire risk. Better Miscibility: Blends more uniformly with diesel without extra additives (unlike ethanol). Energy-Dense: Higher calorific value than ethanol → improved fuel efficiency. Flexible Production: Can be co-produced with ethanol using existing infrastructure with minor modifications. Emission Benefits: Potential to lower particulate emissions and reduce carbon intensity.
• Higher Flash Point: Safer than ethanol for diesel blending as it is less volatile and reduces fire risk.
• Better Miscibility: Blends more uniformly with diesel without extra additives (unlike ethanol).
• Energy-Dense: Higher calorific value than ethanol → improved fuel efficiency.
• Flexible Production: Can be co-produced with ethanol using existing infrastructure with minor modifications.
• Emission Benefits: Potential to lower particulate emissions and reduce carbon intensity.
• Applications:
• Biofuel Blend: Up to 10% blend with diesel (recommended) for transport sector. Solvent Industry: Used in paints, coatings, chemical synthesis. Aviation & Marine Fuel: Research ongoing for future sustainable fuel use. Feedstock for Chemicals: Can be converted to jet fuel, plastics, and rubber intermediates.
• Biofuel Blend: Up to 10% blend with diesel (recommended) for transport sector.
• Solvent Industry: Used in paints, coatings, chemical synthesis.
• Aviation & Marine Fuel: Research ongoing for future sustainable fuel use.
• Feedstock for Chemicals: Can be converted to jet fuel, plastics, and rubber intermediates.
• Limitations:
• Low Cetane Number: Reduces ignition quality, may cause knocking unless additives are used. Engine Compatibility: Over 10% blend may impact engine performance and durability. Incremental Cost: Additives and blending infrastructure upgrades raise costs. Miscibility Concerns: Needs biodiesel as co-solvent for full homogeneity.
• Low Cetane Number: Reduces ignition quality, may cause knocking unless additives are used.
• Engine Compatibility: Over 10% blend may impact engine performance and durability.
• Incremental Cost: Additives and blending infrastructure upgrades raise costs.
• Miscibility Concerns: Needs biodiesel as co-solvent for full homogeneity.