نتایج جستجو برای: udmh
تعداد نتایج: 51 فیلتر نتایج به سال:
Many modern launch vehicles use unsymmetrical dimethylhydrazine (UDMH) as liquid fuel in the space program. UDMH is highly toxic and poses a serious threat to the environment and to humans. One of the most effective methods of UDMH neutralization in case of fuel spills is adsorption. This paper is the first to suggest using hydrolysis lignin as rocket fuel adsorbent. The research was based ...
Unsymmetrical dimethylhydrazine (UDMH) is very toxic and hard to decompose in traditional ways. In this paper, the gasification of unsymmetrical supercritical water was studied a batch reactor under different conditions. The hydrogen production process UDMH metal containers multiphase reaction process. effects temperature, alkaline catalysts, residence time, oxidation on were systematically stu...
1,1-Dimethylhydrazine (UDMH) is used as a liquid fuel for missile and is a toxic matter. In this work to decontaminate UDMH from aqueous solution, hybridized photocatalytic and hydrogen peroxide oxidation processes have been used. The process was performed in a suspension reactor equipped with a UV-C lamp (150 W). Fe3O4@SiO2@TiO2 (FST) catalyst was used as a magnetic recyclable photocatalyst. T...
Abstract: Nano pore Mordenite membranes were prepared on the outer surface of ceramic tubular tubes via hydrothermal synthesis and evaluated for dehydration pervaporation of water unsymmetrical dimethylhydrazine UDMH mixtures. Highly water-selective mordenite membranes were prepared and the optimum reaction condition was found to be 24 h crystallization time and 170 °C crystallization temperatu...
1 N-nitrosodimethylamine (NDMA) is an emerging disinfection by-product, and we show 2 that use of chlorine dioxide (ClO2) has the potential to increase NDMA formation in waters 3 containing precursors with hydrazine moieties. NDMA formation was measured after 4 oxidation of 13 amines by monochloramine, ClO2 and pre-treatment with ClO2 followed by 5 post-monochloramination. Daminozide, a plant g...
Gel propellants are the optimal state of liquid propellants. Gel propellants not only have the advantages of liquid and solid propellants, but also don’t have the disadvantages of the mentioned propellants. The rheological properties of these propellants have a great effect on their propulsion systems, especially in the dynamic state. With regard to the fact that missile and rocket propellants ...
gelled propellants are improved propellants that can be considered as the final extension of liquid propellants. high specific impulse, good density and safety better than that of both solid and liquid propellants are advantages of the gel propellants. they are made by addition a suitable gellant to liquid propellants. in this research, nano al particles have been used in udmh gel fuel. the gel...
Abstract Unsymmetrical dimethylhydrazine (UDMH), as a high-energy liquid propellant, is widely used in aerospace, rocket, aircraft, and other fields. However, it also has certain toxicity, fire, explosion risks, which will cause harm to the human liver, kidney, central nervous system, blood etc., especially system. UDMH easy be adsorbed on surface of body or substances, but there lack research ...
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