• Proceedings of the Korean Society of Propulsion Engineers Conference
• /
• 2005.11a
• /
• pp.5-8
• /
• 2005

In this report the developing trends of several clean and green propellants have been summarized. A low-acid clean propellant has been developed, which substantially reduced the content of hydrochloric acid(HCl) in the solid rocket exhaust. Although the chlorine-free approach is now preferred, this technology has not been proved yet. Another acid suppression effect of Magnalium(Mg-Al Alloy) was investigated. Reports says that the concentration of HCl could be reduced to approximately one-fifth of conventional propellant. Many 'green' propellants with low toxicity are being developed for next-generation post-boost propulsion systems, in which combustion research on the Al or Mg fine metal particles with hot steam in various stoichiometric conditions are being performed.

• Proceedings of the KAIS Fall Conference
• /
• 2004.11a
• /
• pp.255-258
• /
• 2004

Hydrazine is a weak base and strong reducing agent in the aqueous solution and is primarily utilized as a high-energy rocket propellant and an oxygen scavenger in boiler or feedwater. The objective of this study was to investigate the physicochemical properties and reactions of hydrazine and the catalytic and thermal decomposition by the temperature change. Hydrazine was fast decomposed with the catalyst of lower activation energy and at the higher temperature.