To compare working methodologies between the cost engineering functions in NASA Marshall Space Flight Center (MSFC) and ESA European Space Research and Technology Centre (ESTEC), as well as to set-up cost cngi~iccri~~g ciipbiiiiies fur future manned Mars projects and other studies which involve similar subsystem technologies in MSFC and ESTEC, a demonstration cost estimate exercise was organize...

2014 The tetragonal-orthorhombic (T-O) structural phase transition observed in the high Tc superconductor La2-xSrxCuo4-y is analysed. It is shown that the tilt of the CUO6 octahedra is the primary order parameter of this phase transition and that the symmetry of the shear distortion induced by the square to rectangle transformation of the oxygen basal plane of the octahedra does not allow a spl...

In recent decades, massive exploitation of fossil fuels caused a growing demand for the production energies from renewable sources. Hydrochar obtained waste biomass via hydrothermal carbonization (HTC) possesses good potentials as biofuel. Therefore, we performed HTC corn cob, paulownia leaves, and olive pomace at different temperatures (180, 220, 260oC). The main goal this study was to compara...

In this study, we assessed the transformation of raw olive pomace into carbon-rich material using mill wastewater (OMWW) as liquid medium for hydrothermal carbonization (HTC) process. The findings were compared accordingly with use distilled water (DW), which is conventional practice. OMWW a matrix enhanced hydrochar yield, but volatile matter, fixed carbon content, and O/C H/C ratios followed ...

This paper presents an overview of heterogeneous partial (amm)oxidation and oxidative dehydrogenation (ODH) of hydrocarbons. The review has been voluntarily restricted to metal oxide-type catalysts, as the partial oxidation field is very broad and the number of catalysts is quite high. The main factors of solid catalysts for such reactions, designated by Grasselli as the “seven pillars”, and pl...

Compared to Earth’s atmosphere, Mars has a thin CO2-rich atmosphere with a surface pressure of about 700 Pa. When normalized to planetary mass (mass of Mars is 10.7% of that of Earth), the abundance of volatiles on Mars is about 0.07% to 6% of that on Earth (when CO2 in terrestrial carbonates is included). Is the depletion of volatiles on Mars a primary feature (because less volatiles accreted ...

In this paper, we calculate the second virial coefficient for binary mixtures of Ar with CH4 and CO in order to evaluate the performance of equations of state (EOSs). The investigated EOSs are van der Waals (vdW), Redlich-Kwong (RK), Peng-Robinson (PR), Carnahan-Starling–van der Waals (CS-vdW) and Guggenheim-van der Waals (G-vdW) based on van der Waals model. In our work, we also use Dieterici ...

Paul E. van der Vet Piet-Hein Speel Nicolaas J.I. Mars April 1995 Abstract The Plinius ontology of ceramic materials covers the conceptualisation of the chemical composition of materials. The design decisions underlying ontology development at our group are discussed. The ontology of ceramic materials is given as a conceptual construction kit, involving several sets of atomic concepts and const...

Experimental and theoretical investigations of the oxidation reaction of CO to form carbon dioxide, catalyzed by size-selected Pd30 clusters soft-landed on MgO(100), are described. The consequences of pretreatment of the deposited clusters with molecular oxygen, O2, at a temperature of ∼370 K followed by annealing at around 450 K are explored. Subsequent to the above pretreatment stage, the sys...