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Green Propellants Perspectives for Future Missions
44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2008Many upper stages and spacecrafts use MMH / NTO for the propulsive manoeuvres. For low and medium delta V operations, a low cost space storable propellant couple could be selected e.g. N2O / propane or propylene. LOX / light hydrocarbon combinations offer superior Isp and are well suited for higher delta V requirements like planetary orbit insertion or
Yves Maisonneuve +4 more
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Propeller efficiency options for green ship
Proceedings of 2012 9th International Bhurban Conference on Applied Sciences & Technology (IBCAST), 2012Environmental issues and rising fuel prices necessitate better energy-efficiency in all sectors. Shipping industry is one of the stakeholders in environmental issues. Shipping industry is responsible for 3 % of global CO 2 emissions, 14–15 % of global NO X emissions and 16 % of global SO X emissions.
Salma Sherbaz, null Wenyang Duan
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Fusing of Seven HBCs toward a Green Nanographene Propeller
Journal of the American Chemical Society, 2019This work presents a green chiral nanographene propeller (NP), which is built by fusing seven hexabenzocoronenes in a helical arrangement. It contains 258 conjugated carbon atoms and represents the largest three-dimensional conjugated polycyclic aromatic hydrocarbons ever prepared using scalable solution chemistry.
Yanpeng Zhu +3 more
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Gelled hydrogren peroxide for green propellants
2010Nearly pure hydrogen peroxide with less than 1% water was gelled using 15 to 25% polyvinyl-pyrrolidon (PVP) resulting in stable mono-propellants with reliable rheological properties and sensitivity parameters better than nitromethane according to drop hammer and friction. Maximum vacuum specific impulse was calculated to 2750 Ns/kg.
Weiser, Volker +4 more
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2018
Friendly or green compositions are being sought in many kinds of applications, such as fertilization, building materials, energy generation, and so on. Thus, this classification (green) can be established after the subjection of the compound to a thorough toxicity study.
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Friendly or green compositions are being sought in many kinds of applications, such as fertilization, building materials, energy generation, and so on. Thus, this classification (green) can be established after the subjection of the compound to a thorough toxicity study.
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GRAIL: Green Solid Propellants for Launchers
EUCASS, 2017Ammonium perchlorate (AP) is used in solid propellants for launchers. AP is in many ways an excellent oxidizer, but unfortunately it has a negative impact on the environment and on personal health. With ever increasing environmental concerns green solid propellants are desired. The aim of the EU funded project GRAIL is to determine if it is possible to
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Ignition Test of Bi-Propellant Propulsion System Based on Green Propellants for Microsatellite
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011Purpose of microsatellites under 50kg-class development, is now becoming to practical and more complicated mission. At the same time, propulsion system for the microsatellites tends to be eagerly desired for their missions with orbit transfer. Therefore, we considered chemical propulsion is very suitable for the microsatellites and started to develop ...
Nobuyoshi Suzuki, Hironori Sahara
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Selection and Characterization of Green Propellants for Micro-Resistojets
Journal of Heat Transfer, 2017The number of launches of nano- and pico-satellites has significantly increased over the past decade. Miniaturized subsystems, such as micropropulsion, for these classes of spacecraft are rapidly evolving and, in particular, micro-resistojets have shown great potential of applicability.
Daduí C. Guerrieri +3 more
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High Performance Green Propellant for Satellite Applications
45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009This paper provides an overview of LMP-103S, a “High Performance Green Propellant” (HPGP) and outlines the benefits of LMP-103S as compared to hydrazine for monopropellant satellite applications. Corresponding performance and design characteristics of HPGP thrusters in the range of 1 N to 5 N are also reviewed.
K. Anflo +3 more
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Performance of a green propellant thruster with discharge plasma
Acta Astronautica, 2017Abstract A discharge plasma was applied to initiate the combustion of a hydroxylammonium nitrate-based propellant as a substitute for the catalysts that are typically employed. The resulting thrust and thrust-to-power ratio during short interval firing tests as well as the chamber pressure with a single pulse discharge were evaluated.
Takahiro Shindo +4 more
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