Combustion Characteristics of ADN (Ammonium Dinitramide) Based Solid Propellants

Combustion Mechanisms of Solid Propellants

Synthesis of Ammonium Dinitramide by Nitration of Potassium and Ammonium Sulfamate. The Effect of Sulfamate Conterion on ADN Purity

Nitration of potassium sulphamate was carried out using a mixture of sulphuric and nitric acid at -30 °C. The reaction time was optimized at the mole ratio of sulphuric to nitric acid of (1:3.5). The difference in product yield by changing the potassium to ammonium sulphamate was studied throughly. It was found that both the yield and purity of the product is better starting with potassium ...

Replacement of Hydrazine: Overview and First Results of the H2020 Project Rheform

The goal of the EU Horizon2020 project Rheform is the replacement of hydrazine with liquid propellants based on ammonium dinitramide (ADN) for orbital and launcher propulsion systems. Hydrazine and its derivatives are the standard propellants for spacecraft propulsion system since the 1960s, but they are highly toxic and carcinogenic. New regulations will lead to restriction of their use in the...

Mechanism and kinetics for ammonium dinitramide (ADN) sublimation: a first-principles study.

The mechanism for sublimation of NH(4)N(NO(2))(2) (ADN) has been investigated quantum-mechanically with generalized gradient approximation plane-wave density functional theory calculations; the solid surface is represented by a slab model and the periodic boundary conditions are applied. The calculated lattice constants for the bulk ADN, which were found to consist of NH(4)(+)[ON(O)NNO(2)](-) u...

مطالعه اثر کاتالیستی اکسید روی )ІІ( (ZnO) با مورفولوژی متفاوت بر تجزیه حرارتی آمونیوم دی نیترآمید (ADN)

Ammonium dinitramide (ADN) with a positive oxygen balance (25.8%) is a metal free- energetic compound, which is used in military explosives and smokeless or green solid propellants. Combustion products of solid propellants based on ADN are clean and smokeless and they do not release hydrogen chloride gas, which can be an excellent alternative compound as an oxidizer in the solid propellant form...