화학공학소재연구정보센터
Korean Chemical Engineering Research, Vol.59, No.2, 296-303, May, 2021
Cu-La-Al/honeycomb 촉매를 이용한 저독성 추진제 분해
Decomposition of Low-toxic Propellant by Cu-La-Al/honeycomb Catalysts
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초록
본 연구의 목적은 저독성 추진제인 ammonium dinitramide (ADN) 기반 액체 추진제 분해용 촉매로서 Cu가 담지된 honeycomb 촉매의 적용 가능성을 고찰하는 것이다. honeycomb 지지체 위에 구리, 란타늄 및 알루미나 혼합물을 wash coating 방법으로 담지하여 Cu-La-Al/honeycomb 촉매를 제조하였다. 금속 담지량이 Cu-La-Al/honeycomb 촉매의 물리·화학적 특성에 미치는 영향을 분석하였으며, ADN 기반 액체 추진제의 저온 분해 성능에 미치는 영향을 고찰하였다. Wash coating의 횟수가 증가할수록 금속의 담지량이 증가하였으며, 활성금속인Cu의 담지량을 4.1 wt%까지 증가시킬 수 있었다. Cu-La-Al/honeycomb 촉매의 BET 표면적은 3.1~4.1 m2/g 범위 내에 있었으며, 미세기공은 거의 존재하지 않으면서 약 20~200 nm 범위의 메조기공과 거대기공이 발달한 기공 구조를 가지고 있음을 확인하였다. Cu (2.7 wt%)-La-Al/honeycomb 촉매가 ADN 기반 액체 추진제의 분해 반응에서 활성이 가장 뛰어났으며, 그 이유는 표면적과 기공부피가 가장 크고 메조기공과 거대기공이 가장 잘 발달했기 때문으로 해석할 수 있다.
The objective of this study is to investigate the applicability of a Cu-supported honeycomb catalyst as a catalyst for decomposition of a low toxic liquid propellant based on ammonium dinitramide (ADN). A mixture of copper, lanthanum, and alumina was supported on the honeycomb support by wash coating to prepare a Cu-La-Al/ honeycomb catalyst. We elucidated that the effect of metal loading on the physicochemical properties of Cu-La-Al/ honeycomb catalyst and catalytic performance in decomposition of the ADN-based liquid propellant. As the number of wash coatings increased, the amount of active metal Cu was increased to 4.1 wt%. The BET surface area of the Cu-La-Al/honeycomb catalyst was in the range of 3.1~4.1 m2/g. The micropores were hardly present in Cu-La-Al/honeycomb catalysts, however, the mesopores and macropores were well developed. The Cu (2.7 wt%)-La-Al/honeycomb catalyst exhibited the highest activity in the decomposition of the ADN-based liquid propellant, which is attributed to the largest surface area, the largest pore volume, and the well-developed mesopores and macropores.
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