Angelo Pasini’s research while affiliated with University of Siena and other places

... Their ability to maintain structural integrity at high temperatures and high pressures ensures consistent catalytic performance against the deactivation of granular surfaces . The interconnected porosity of cellular ceramics allows for a high surface area-to-volume ratio, promoting optimal interaction between reactants and the catalytic surface, ensuring maximum catalytic efficiency, which is vital for the effective propulsion and maneuvering of spacecraft (Remissa et al., 2023;Souagh et al., 2022;Amrousse et al., 2015;Amrousse et al., 2024;Amrousse et al., 2012;Harimech et al., 2023b;2022;Mansurov et al., 2020;Atamanov et al.;Remissa et al., 2024;Nosseir et al., 2024;Chai et al., 2024;Kumari et al., 2024;Ercan et al., 2024). ...

Reference:

Cellular Ceramics Used as Catalytic Supports for Heterogeneous Catalyst Synthesis

... Values are normalized and presented as percentages relative to the highest impact option, MON-3/MMH, for all scenarios. These values were primarily derived from the single-score total impact, combining results from 15 impact indicators, as detailed in the related publication [29]. Fig. 6. ...

Reference:

A Holistic Approach for Efficient Greener In-Space Propulsion

... Highly dynamic manoeuvres and long-term satellite missions require chemical propulsion, which brings the storability of propellant to the table. For years, conventional propellants have been mainly based on hydrazine and its derivatives [5][6][7]. The problem is that despite the acceptable performance (specific impulse: N 2 H 4 -220 s [8]), they are highly toxic, inflammable and carcinogenic [9,10], which influences the cost and safety of production, transport and ground handling in general. ...

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Initial Investigation of Catalyst Pack for 98%+ Hydrogen Peroxide Satellite Monopropellant Thruster

... Furthermore, the presence of condensed species during expansion, as indicated by the asterisk in the data, highlights the need for careful consideration of all factors that may impact the overall efficiency and effectiveness of the bipropellant system. (Sarritzu & Pasini, 2024 Among the various other green alternatives, it is important to highlight water propulsion, which, although is still in its early stages of development, holds significant potential benefits for the sector. Water is easily transportable, can be stored indefinitely, is relatively abundant in space, and is simple to resupply. ...

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Catalytic Materials for Space Propulsion Applications: Hydroxylammonium Nitrate (HAN) and Hydrogen Peroxide (H2O2) Decompositions

... Hydrogen peroxide can be used as a one-component or two-component propellant. Utilized in a bipropellant system, H 2 O 2 acts as the oxidizer for fuels like hydrazine [7][8][9][10]. When used as a one-component propellant, the easily chemically induced catalytic decomposition reaction of the hydrogen peroxide into gaseous water vapour and oxygen is used to generate thrust [4,11]. ...

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Microstructure of highly effective platinum–iridium alloys as catalysts for hydrogen peroxide decomposition

... Relative cost figures are expressed as percentages of the most expensive one. More detailed computations can be found in the related publication [24]. ...

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A Holistic Approach for Efficient Greener In-Space Propulsion

... • A "Greener Hypergolic" option using 98%-HTP with Ethanol or RP-1, adopted in various recent systems [1]. • A "Self-Pressurizing" system combining Nitrous Oxide with Ethane or similar light hydrocarbons with high vapor-pressure [3]. Initially, the paper presents an overview of these systems, setting the stage for a detailed analysis of their environmental footprints from propellant manufacture to system loading for a generic orbital stage mission scenario. ...

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Towards Greener Propulsion: Environmental Categorization of Liquid In-Space Propulsion Systems via Life Cycle Analysis

... Rocket for Agile Cislunar Operations (DRACO) project under an agreement between the Defense Advanced Research Projects Agency (DARPA) and the National Aeronautics and Space Administration (NASA), which is proposed to be an unmanned nuclear thermal rocket that is planned to be demonstrated in 2027 [4]. Given the rapid pace at which this technology must be developed, accurate and reliable NTP simulation and modeling is imperative [5]. This need was emphasized by the National Academy of Science, Engineering, and Medicine in a study [6] that focused on the requirements to mature NTP technology. ...

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Integrated Steady-State System Package for Nuclear Thermal Propulsion Analysis Using Multi-Dimensional Thermal Hydraulics and Dimensionless Turbopump Treatment

... As the number of payloads and missions increases, there is a growing need for robust in-space logistics systems, comparable to those on Earth, to efficiently handle the influx of new systems and assist them toward potentially longmissions. Central to this discussion is the orbital stage, which operates similarly to Earth's public transportation systems by offering rideshare capabilities that reorganize the logistics of deploying and managing payloads in space [8]. This strategy not only simplifies space operations but also meets the growing demands for on-orbit servicing. ...

Reference:

A Holistic Approach for Efficient Greener In-Space Propulsion

... In the framework of the FLPP programme at the Space Transportation Directorate of ESA, which aims at fostering the implementation of novel technologies, the use of green storable propellants was preferred to more traditional ones. More specifically, the identification of a suitable HTP/Hydrocarbon combination was favoured [14]. ...

Reference:

Roadmap Towards a Greener Kick-Stage Propulsion System