Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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The Response Characteristics of the Hydrogen Peroxide Monopropellant Thruster as Active Materials

활성물질에 따른 과산화수소 추력기의 응답 특성

  • 안성용 (한국과학기술원 항공우주공학과) ;
  • 권세진 (한국과학기술원 항공우주공학과)
  • Published : 2008.10.30
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Abstract

The performance of several catalysts to decompose the high test peroxide (HTP) was described in this paper. Manganese oxide, Platinum and Iridium were coated on the gamma alumina. The catalyst activity as active materials was measured at the flask reactor. The response time of various catalysts was also measured with a 50 Newton class thruster. $Ir/Al_2O_3$ that showed the best activity in the flask reactor and response time at the thruster, failed the reaction when continuous mode test was carried out with the thruster. $Pt/Al_2O_3$ and $MnO_2/Al_2O_3$ can be substitutes to decompose the HTP. In addition, for larger thruster, $MnO_2/Al_2O_3$ can be a good catalyst because its cost is below 5 % of $Pt/Al_2O_3$.

고농도 과산화수소를 분해시킬 수 있는 다양한 촉매의 성능을 비교하였다. 감마 알루미나에 산화망간, 백금, 이리듐을 각각 코팅하여 펠렛 촉매를 제작하였다. 각기 다른 세 가지 촉매를 이용하여 플라스크 반응기에서 반응성을 비교하였고, 50 Newton 급 추력기를 이용하여 펄스 응답 특성을 비교하였다. 그 결과 이리듐 촉매가 가장 높은 활성, 빠른 응답성을 나타내었으나, 연속모드에서 반응 실패 경향을 보여 과산화수소 분해용 촉매로는 부적절하였다. 백금, 산화망간 촉매 또한 우수한 반응성을 보여 높은 가능성을 보였으며, 고추력 추력기와 같이 촉매양이 많이 요구되는 경우, 비용문제를 고려한다면 산화망간 또한 과산화수소 분해에 적합할 것으로 판단된다.

Keywords

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