高氯酸铵
放热反应
材料科学
燃烧率(化学)
吸热过程
热分解
氧化剂
分解
化学工程
无机化学
焓
推进剂
化学
吸附
物理化学
有机化学
热力学
工程类
物理
作者
Neil Vaz,Joseph D. Pantoya,Kelsea K. Miller,Armando de Rezende,Adélia J. A. Aquino,Andrew R. Demko,Michelle L. Pantoya
标识
DOI:10.1002/adem.202301099
摘要
The kinetics of a strategically synthesized burn rate enhancer (BRE) are investigated in its reaction with ammonium perchlorate (AP). The BRE is designed for multifunctionality by 1) producing reactive gases that couple with AP gas production; 2) trapping reactive gases with high surface area; and 3) exposing metal cations to incite exothermic reactions at a temperature coincident with AP decomposition. This study advances inorganic synthesis by introducing a metal inorganic framework (MIF) composed of an aluminum cation (Al +3 ) surrounded by inorganic “linker” molecules of oxidizing species. To increase surface area, a porous, amorphous MIF (a‐MIF) is synthesized by controlling solution properties of an acid–base precipitation reaction. Upon gas generation, high surface area and aluminum‐rich surface of a‐MIF accelerate AP decomposition and induce an exothermic reaction that is otherwise endothermic in thermal equilibrium analysis. AP decomposition rate is advanced by reducing peak onset temperature and increasing decomposition rate with addition of a‐MIF (i.e., from 17% min −1 at 401 °C to 18% min −1 at 365 °C). Enthalpy of AP decomposition increases from +240 J g −1 to −1040 J g −1 . Results introduce an approach for increasing the decomposition rate of solid oxidizers by demonstrating a recipe for designing and synthesizing an MIF.
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