Kim Wooram, Heo Sujeong, Jeon Jong-Ki, Jo Youngmin
Department of Applied Environmental Science, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 17104, Korea.
Department of Chemical Engineering, Kongju National University, Cheonan, Chungcheongnam-do 31080, Korea.
J Nanosci Nanotechnol. 2021 Aug 1;21(8):4524-4531. doi: 10.1166/jnn.2021.19436.
As an eco-friendly alternative fuel material, ammonium dinitramide (ADN, NH₄N(NO₂)₂) is safe and stable at room temperature; however, it requires high purity for practical applications. A small amount of impurities can retard the catalytic decomposition of the monopropellant in the thruster, lower the specific impulse, and induce side effects such as clogging of the nozzle. Therefore, we purified NH₄N(NO₂)₂ by performing repeated extractions, adsorption by powdered activated carbon, and low-temperature extractions. In this study, we evaluated the chemical density of purified NH₄N(NO₂)₂ through Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and ion chromatography, and obtained a final purity of 99.8%. Furthermore, we fabricated a liquid fuel using high-purity NH₄N(NO₂)₂ as the main oxidizing agent, and can be prepared a mono-propellant formulation that exhibited decomposition at a minimum temperature of 148 °C.
作为一种环保型替代燃料材料，二硝酰胺铵（ADN，NH₄N(NO₂)₂）在室温下安全稳定；然而，其实际应用需要高纯度。少量杂质会阻碍推进器中单组元推进剂的催化分解，降低比冲，并引发诸如喷嘴堵塞等副作用。因此，我们通过反复萃取、用粉末活性炭吸附以及低温萃取来提纯NH₄N(NO₂)₂。在本研究中，我们通过傅里叶变换红外光谱、紫外可见光谱和离子色谱评估了提纯后的NH₄N(NO₂)₂的化学密度，最终纯度达到了99.8%。此外，我们以高纯度NH₄N(NO₂)₂作为主要氧化剂制备了一种液体燃料，并能制备出在最低148℃时发生分解的单组元推进剂配方。
