Demonstration of Ethanol-Blended Hydrogen Peroxide Gas Generator for Ramjet Combustor Flow Simulation

Jung, Wanyeong; Baek, Seungkwan; Kwon, Taesoo; Park, Juhyeon; Kwon, Sejin

doi:10.2514/1.b36633

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…Different kinds of silica, carbon, and alumina are possible candidates as a catalyst support, but gamma phase alumina was ultimately selected, as it has not only a high enough surface area for a catalyst reaction but also durability in the high-pressure and -temperature environment. In addition, it has reliability and good compatibility with the active material as reported [10,11,18,22,66,73,81,87].…”

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confidence: 79%

“…In regard to the catalyst active material to effect hydrogen peroxide decomposition, there are various options, such as platinum [19,[76][77][78][79][80][81][82], iridium [20], ferrous chloride [83], silver [84][85][86], and manganese dioxide [10,11,18,22,66,73,81,87]. In this study, manganese dioxide was chosen as the active material, because it has exhibited high decomposition efficiency for hydrogen peroxide, and it is relatively easily fabricated at low cost.…”

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confidence: 99%

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Preliminary Assessment of Hydrogen Peroxide Gel as an Oxidizer in a Catalyst Ignited Hybrid Thruster

Huh

Jyoti

Yun

et al. 2018

International Journal of Aerospace Engineering

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In regard to propulsion system applications, the stability of liquid propellants in long-term storage is of increasing importance, and this had led to a greater interest in gelation technology. As part of a preliminary test to determine the feasibility of using a gel propellant in a rocket with a catalyst bed, a hybrid rocket with a catalyst reactor using a gel propellant as an oxidizer was tested for the first time in this study. Experiments were conducted with two different oxidizers: one with liquid phase hydrogen peroxide and the other with gel phase hydrogen peroxide, as well as high-density polyethylene as fuel for a 250 N class hybrid thruster performance test. The thruster was designed with the catalyst ignition system, and a catalyst was manufactured to be inserted into the catalyst reactor to facilitate oxidizer decomposition. While the test result with neat hydrogen peroxide indicated sufficient decomposition efficiency using a manganese dioxide/alumina catalyst and successful autoignition of the fuel via the decomposed product, gel hydrogen peroxide exhibited insufficient decomposition and there were difficulties in operating the thruster as a part of the catalyst was covered in the gelling agent. This preliminary study identifies the potential challenges of using a gel phase oxidizer in a catalyst ignited hybrid thruster and discusses the technical issues that should be addressed in regard to a gel propellant hybrid thruster design with a catalyst reactor.

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confidence: 99%

Preliminary Assessment of Hydrogen Peroxide Gel as an Oxidizer in a Catalyst Ignited Hybrid Thruster

Huh

Jyoti

Yun

et al. 2018

International Journal of Aerospace Engineering

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“…For example, the active phase, an expensive metal catalyst, is deposited as a thin-layer, highly porous support to increase the specific surface area. Use of platinum [ 54 ] or manganese oxide [ 55 ] deposited over aluminum oxide, structured networks of silver [ 56 ], granules and tablets of aluminum oxide with deposited layers of platinum or manganese oxide [ 57 ], cellular and honeycomb monoliths [ 58 ] from manganese oxides dispersed on monolithic zirconia substrates have been demonstrated in various studies for efficient oxygen generation. An essential characteristic of the catalyst which allows regulation of its functional properties is porosity or, more precisely, the ratio between specific surface area and mechanical strength.…”

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confidence: 99%

Oxygen Generation Using Catalytic Nano/Micromotors

Naeem

Mujtaba

et al. 2021

Micromachines

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Gaseous oxygen plays a vital role in driving the metabolism of living organisms and has multiple agricultural, medical, and technological applications. Different methods have been discovered to produce oxygen, including plants, oxygen concentrators and catalytic reactions. However, many such approaches are relatively expensive, involve challenges, complexities in post-production processes or generate undesired reaction products. Catalytic oxygen generation using hydrogen peroxide is one of the simplest and cleanest methods to produce oxygen in the required quantities. Chemically powered micro/nanomotors, capable of self-propulsion in liquid media, offer convenient and economic platforms for on-the-fly generation of gaseous oxygen on demand. Micromotors have opened up opportunities for controlled oxygen generation and transport under complex conditions, critical medical diagnostics and therapy. Mobile oxygen micro-carriers help better understand the energy transduction efficiencies of micro/nanoscopic active matter by careful selection of catalytic materials, fuel compositions and concentrations, catalyst surface curvatures and catalytic particle size, which opens avenues for controllable oxygen release on the level of a single catalytic microreactor. This review discusses various micro/nanomotor systems capable of functioning as mobile oxygen generators while highlighting their features, efficiencies and application potentials in different fields.

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