Green hydrogen-based aviation fuels offer a path to near-zero carbon emissions by using renewable energy to split water, producing hydrogen that powers aircraft directly (fuel cells/combustion) or creates synthetic kerosene (e-fuels), with significant potential but facing challenges in infrastructure, cost, and aircraft redesign, requiring innovation for commercial viability, though blended use in existing planes is an interim step.

Green hydrogen-based aviation fuels offer a path to near-zero carbon emissions by using renewable energy to split water, producing hydrogen that powers aircraft directly (fuel cells/combustion) or creates synthetic kerosene (e-fuels), with significant potential but facing challenges in infrastructure, cost, and aircraft redesign, requiring innovation for commercial viability, though blended use in existing planes is an interim step. 
How it Works 
Production: -
Green hydrogen is made by electrolysis, splitting water (H2Ocap H sub 2 cap O𝐻2𝑂) using renewable electricity (solar, wind).
Utilization:Direct Combustion:-
 Hydrogen is burned in modified gas turbines, emitting water vapor and NOx.
Fuel Cells: ,-
Hydrogen reacts with oxygen in fuel cells to produce electricity, powering electric motors, with only water as a byproduct.
Synthetic Kerosene (e-fuels):-
 Green hydrogen can be combined with captured carbon to create synthetic jet fuel, a "drop-in" fuel compatible with current engines. 
Advantages 
Zero Carbon: -
No CO2 emitted at the point of use.
Reduced Soot:-
 Significantly lowers soot and unburned carbon particles.
Climate Impact: -
Potential for near-zero lifecycle emissions with green production. 
Challenges & Considerations 
Infrastructure: -
Requires massive new ground and network infrastructure.
Storage: .-
Liquid hydrogen needs cryogenic storage (-253°C), demanding new tank designs.
Energy Density: -
Hydrogen has lower volumetric energy density, meaning larger tanks are needed.
Cost:-
 Currently more expensive than conventional fuels.
Non-CO2 Effects: -
Water vapor and NOx emissions still need careful management. 
Outlook 
Hybrid Approach:-
 Blending hydrogen with existing fuels for current aircraft, or using hydrogen for short-haul electric/fuel-cell planes.
Long-Term Goal: -
Full decarbonization via liquid hydrogen for larger aircraft.
Industry Focus: -
Public-private partnerships and policy are crucial for scaling up. 
To help assess the best path forward, would you like to know more about the specific technological hurdles in developing liquid hydrogen storage systems or the cost projections for green hydrogen in aviation?

MJF Lion ER YK Sharma 

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