Ceramic catalysts for the decomposition of H2O2 - : Influence of wash-coat procedure and active phase

摘要: Abstract The catalytic decomposition of 70 % H2O2 is proposed as a sub-component bipropellant engine using ethanol fuel. Different catalysts have been prepared, characterized and evaluated. catalyst substrate commercial mullite ceramic in the shape honeycomb monolith. Three different washcoat procedures compared with aim to allow good anchorage active phase precursors: silver nitrate sodium permanganate. For silver-based catalysts, X-rays diffraction leads presence mullite, corundum metallic phases. After firing, loss evidenced well formation oxide, depending on wash-coat procedure. are sorted according evaluation results agreement specific surface area: best wash-coating procedure highest area limited weight after firing. Manganese oxide-based samples exhibit better activity than could survive endurance test 100 min.