Choi Youngmin, Heo Sujeong, Kim Munjeong, Lee Jeongsub, Park Young Chul, Jeon Jong-Ki
Department of Chemical Engineering, Kongju National University, Cheonan, Chungcheongnam-do 31080, South Korea.
Agency for Defense Development, Deajeon 34186, South Korea.
J Nanosci Nanotechnol. 2020 Nov 1;20(11):7114-7118. doi: 10.1166/jnn.2020.18842.
A hexaaluminate support was prepared by a co-precipitation method, and a metal (Cu, Pt, or Ir) was impregnated on the support to prepare a powdered catalyst. After that, organic and inorganic binders were added to the powdery catalyst and then pellets were formed. The so-formed catalysts were heat-treated at 1200°C, and their physicochemical properties were analyzed by N₂-adsorption, X-ray diffraction (XRD), X-ray fluorenscence (XRF), and scanning electron microscopy (SEM). The decomposition activity of the catalysts on an ammonium dinitramide (ADN)-based liquid propellant was evaluated repeatedly, and the effects of catalyst composition and morphology on low temperature decomposition activity and durability were investigated. It was confirmed that the Cu-hexa-pellet, Pt-hexa-pellet, and Ir-hexa-pellet catalysts could be recovered and reused as a catalyst for decomposition of an ADN-based liquid monopropellant. The initial activity and the thermal stability of the Cu-hexa-pellet catalyst for the decomposition of ADN-based liquid monopropellants were better than for the other catalysts. The better activity of the Cu-hexa-pellet catalyst seems to be because the dispersion of the copper was higher than the metal dispersion in the other two catalysts.
采用共沉淀法制备了六铝酸盐载体，并将金属（铜、铂或铱）负载在该载体上制备粉末状催化剂。之后，向粉末状催化剂中添加有机和无机粘结剂，然后制成颗粒。将如此制成的催化剂在1200℃下进行热处理，并通过N₂吸附、X射线衍射（XRD）、X射线荧光（XRF）和扫描电子显微镜（SEM）分析其物理化学性质。反复评估了催化剂对基于二硝酰胺铵（ADN）的液体推进剂的分解活性，并研究了催化剂组成和形态对低温分解活性和耐久性的影响。证实了Cu-hexa颗粒、Pt-hexa颗粒和Ir-hexa颗粒催化剂可作为基于ADN的液体单推进剂分解的催化剂回收再利用。用于基于ADN的液体单推进剂分解的Cu-hexa颗粒催化剂的初始活性和热稳定性优于其他催化剂。Cu-hexa颗粒催化剂更好的活性似乎是因为铜的分散度高于其他两种催化剂中的金属分散度。
