Commercial aviation contributes over 2.5% of global carbon dioxide emissions. Because battery electric and hydrogen aircraft are decades away from long-haul passenger flight viability, Sustainable Aviation Fuel (SAF / Bio-Jet Fuel) is the only available technological solution to decarbonize commercial aviation. SAF is a 100% drop-in fuel compatible with existing jet engines, fueling hydrants, and airport storage tanks without any aircraft modifications.
Under the National Biofuel Coordination Committee (NBCC) and DGCA regulations, commercial airlines operating from India face mandatory 1% SAF blending by 2027, scaling to 5% by 2030. This creates an immediate, guaranteed domestic off-take market exceeding 140 Million Liters of SAF annually. This guide outlines HEFA hydroprocessing, feedstock procurement under FSSAI RUCO, ASTM certification, and financial returns in India for 2026.
Mandatory Airline Demand: Major airlines (Air India, IndiGo, Akasa Air) have signed long-term off-take MOUs for certified SAF to avoid millions of dollars in carbon penalties under the International Civil Aviation Organization's CORSIA agreement.
1. HEFA Technology: From Used Cooking Oil to Synthetic Paraffinic Kerosene
The Hydroprocessed Esters and Fatty Acids (HEFA) refining process operates across four chemical engineering stages:
- Feedstock Pre-Treatment & Bleaching: Raw Used Cooking Oil (UCO) is filtered, degummed with citric acid, and bleached with activated bentonite clay to remove chlorides, phospholipids, and free fatty acids that poison hydrotreating catalysts.
- Hydrodeoxygenation (HDO - 350°C, 70 Bar): Pre-treated oils are mixed with high-purity hydrogen gas over nickel-molybdenum (NiMo) catalysts, stripping oxygen atoms and converting triglycerides into straight-chain n-paraffins (n-C15 to n-C18 alkanes) while releasing water and propane.
- Catalytic Hydroisomerization & Hydrocracking: Straight-chain paraffins pass over noble metal zeolite catalysts to selectively branch (isomerize) and crack molecules into jet-fuel boiling range hydrocarbons (C9 to C16), lowering freeze point below -47°C to meet strict aviation winterization specs.
- Fractional Distillation: The hydroprocessed stream is separated in a fractional distillation column into three saleable product cuts: Sustainable Aviation Fuel (65%), Renewable Green Diesel (25%), and Bio-Naphtha (10%).
2. CapEx Breakdown for a 20,000 Ton/Year SAF (HEFA) Refinery
Capital outlay for establishing a 20,000 Ton annual capacity bio-jet fuel hydroprocessing refinery:
| Equipment / Infrastructure | Specifications | Cost (₹ Crore) |
|---|---|---|
| Land & Petrochemical Industrial Facility | 8 Acres land near pipeline/port hub, PESO-compliant tank farm | ₹18.0 Cr |
| Feedstock Pre-treatment & Bleaching Skid | Continuous chemical degumming, bleaching earth filter press & centrifuge | ₹12.5 Cr |
| High-Pressure Hydrodeoxygenation (HDO) Reactor Loop | Fixed-bed trickle reactor (80 bar, 380°C) with NiMo catalyst charge | ₹32.0 Cr |
| Hydroisomerization & Dewaxing Reactor Skid | Pt-zeolite catalytic isomerizer achieving -47°C freeze point | ₹24.0 Cr |
| Hydrogen Generation / Pressure Swing Adsorption Skid | SMR hydrogen unit or high-capacity hydrogen compression station | ₹16.5 Cr |
| Multi-Cut Fractional Distillation Column System | Atmospheric vacuum distillation column producing aviation kerosene cut | ₹15.0 Cr |
| Aviation Fuel Quality Testing Lab (ASTM D7566 / IS 17081) | GCxGC-MS, automated freeze point analyzer, flash point & smoke point tester | ₹8.5 Cr |
| Working Capital & UCO Feedstock Storage Reserve | Used cooking oil inventory, catalyst reserves, bulk storage tanks | ₹22.5 Cr |
| Total Estimated CapEx | Turnkey SAF Refinery | ₹149.0 Cr |
RUCO Feedstock Aggregation: FSSAI's Repurpose Used Cooking Oil (RUCO) initiative mandates that food businesses discard cooking oil after 3 frying cycles (total polar compounds > 25%), creating guaranteed domestic aggregator supply networks.
3. Production Output & Revenue Streams
Annual yields from processing 25,000 Tons of Used Cooking Oil:
| Product Cut | Annual Production | Selling Price | Annual Revenue (₹) |
|---|---|---|---|
| Sustainable Aviation Fuel (SAF / SPK) | 14,000 Tons (~17.5M Liters) | ₹135 / Liter | ₹236.25 Crore |
| Renewable Green Diesel (HVO) | 5,500 Tons (~6.5M Liters) | ₹95 / Liter | ₹61.75 Crore |
| Bio-Naphtha & Renewable LPG | 2,200 Tons | ₹58,000 / Ton | ₹12.76 Crore |
| Total Gross Annual Revenue | Combined Output | - | ₹310.76 Crore |
4. Financial Performance & Payback Period
- Operating Expenses (UCO @ ₹58/kg, hydrogen, power, labor): ₹248 Crore/year.
- Net Operating EBITDA: ₹62.76 Crore
- EBITDA Margin: ~20.2%
- Net Debt Payback Period: 3.4 Years.
Frequently Asked Questions (FAQs)
What is Sustainable Aviation Fuel (SAF) and what are India's mandatory blending targets?
Sustainable Aviation Fuel (SAF) is a drop-in bio-jet fuel synthesized from non-fossil feedstocks (Used Cooking Oil, animal tallow, agricultural residue). The Directorate General of Civil Aviation (DGCA) and Ministry of Petroleum have mandated a 1% SAF blending target for international commercial flights departing India by 2027, rising to 2% by 2028 and 5% by 2030 under the global CORSIA decarbonization framework.
What is the capital setup cost for a 20,000-ton-per-year SAF (HEFA) plant in India?
Establishing a commercial Hydroprocessed Esters and Fatty Acids (HEFA) bio-refinery producing 20,000 Tons of ASTM D7566-compliant SAF and renewable diesel annually costs between ₹55 Crore and ₹160 Crore.
What is the HEFA technology pathway in SAF production?
Hydroprocessed Esters and Fatty Acids (HEFA) is the most commercially mature SAF technology (accounting for >90% of global SAF supply). It reacts triglycerides from Used Cooking Oil (UCO) with hydrogen under high pressure (50–90 bar) and temperature (350°C–400°C) to deoxygenate, hydrocrack, and isomerize fatty acids into synthetic paraffinic kerosene (SPK).
What feedstock is utilized for SAF production in India?
Used Cooking Oil (UCO) collected from commercial restaurants and food processors (under FSSAI RUCO regulations), inedible non-food tree oils (Jatropha, Pongamia/Karanja), and palm fatty acid distillate (PFAD).
What is the commercial price premium of Sustainable Aviation Fuel over fossil Jet A-1?
SAF sells at a 2.5x to 3.5x premium over conventional fossil jet fuel (approximately ₹120 to ₹160 per liter vs ₹85/L for fossil ATF), driven by mandatory airline carbon offset penalties under CORSIA.