Green Propellants by ISRO

Key features:

The Indian Space Research Organization (ISRO) is developing green propellants for future rockets, considering the harmful effects of exhausts released by rockets on the earth’s atmosphere.

  1. ISRO has developed eco-friendly solid propellant based on Glycidyl Azide Polymer (GAP) as fuel and Ammonium Di-Nitramide (ADN) as oxidizer at the laboratory level, which will eliminate the emission of chlorinated exhaust products from rocket motors.
  2. The LOX/LH2 (liquid oxygen – liquid hydrogen) combination is already being used in the cryogenic upper stages of GSLV and GSLV Mk-III launch vehicles.
  3. Additional Facts: ISRO has successfully developed ISROSENE, which is a rocket grade version of kerosene as an alternative to conventional hydrazine rocket fuel.
  4. The propellants that are being used now have a very reactive effect on the ozone layer due to the release of chlorinated exhaust products.

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