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Selection of burning rate modifiers for hydrazinium nitroformate

机译：硝酸甲肼盐的燃烧速率改性剂的选择

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摘要

Species including N_2H_4, NH_3 and N_2O are known to be present near the surface of burning hydrazinium nitroformate (HNF). In this paper, planar laser induced fluorescence from the near surface region of burning HNF pellets is reported indicating the presence of NO_2. These four species are formed in the upper (foamy) layer of the solid phase. A burning rate modifier might be selected to induce reactions between the gaseous species in this layer. Selective catalytic reduction (SCR) is able to start highly exothermic reactions at relatively low temperatures. The SCR catalyst V_2O_5 increases the burning rate of HNF by a factor of 11 at 0.1 MPa. The pressure exponent is reduced to 0.28, far below the target value of 0.5 required for practical application of HNF in propellant formulations. As far as SCR catalysts have been tested as burning rate modifiers of HNF, they are effective, yet incompatible. To overcome this incompatibility remedies might possibly be found in high-temperature catalysts, or in coating particles.
机译：已知包括N_2H_4，NH_3和N_2O的物种存在于燃烧的硝酸甲酰肼（HNF）表面附近。在本文中，据报道，平面激光诱导了来自燃烧的HNF颗粒表面区域的荧光，表明存在NO_2。这四种物质形成在固相的上层（泡沫）层中。可以选择燃烧速率调节剂以引起该层中气态物质之间的反应。选择性催化还原（SCR）能够在相对较低的温度下引发高放热反应。 SCR催化剂V_2O_5在0.1 MPa下将HNF的燃烧速率提高了11倍。压力指数降低到0.28，远低于HNF在推进剂配方中实际应用所需的目标值0.5。就已将SCR催化剂作为HNF的燃烧速率改性剂进行了测试，它们是有效的，但不相容。为了克服这种不相容性，可能在高温催化剂或涂料颗粒中找到补救措施。

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