Results 21 to 30 of about 12,475,330 (320)
Methane, 2023 CO2 methanation was studied on Ni-based yttria-stabilised zirconia (Ni/YSZ) catalysts. The catalysts were prepared by the wet impregnation method, where the amount of Ni content was varied from 5% to 75%.
Osaze Omoregbe +3 more
doaj +1 more source
Nonautonomous equations and almost reducibility sets
Electronic Journal of Qualitative Theory of Differential Equations, 2021 For a nonautonomous differential equation, we consider the almost reducibility property that corresponds to the reduction of the original equation to an autonomous equation via a coordinate change preserving the Lyapunov exponents.
Luis Barreira, Claudia Valls
doaj +1 more source
Understanding and ad hoc Explanation: A Case of Russell’s Reducibility Axiom [PDF]
Омский научный вестник: Серия "Общество. История. Современность", 2022 The article examines the common interpretation of the axiom of reducibility in Principia Mathematica according to which the axiom cannot be considered as logical, which casts doubt on the success of the program of logicism.
V. V. Tselishchev, A. V. Khlebalin
doaj +1 more source
The Reducibility Concept in General Hyperrings
Mathematics, 2021 By using three equivalence relations, we characterize the behaviour of the elements in a hypercompositional structure. With respect to a hyperoperation, some elements play specific roles: their hypercomposition with all the elements of the carrier set ...
Irina Cristea, Milica Kankaraš
doaj +1 more source
Copper-Based Silica Nanotubes as Novel Catalysts for the Total Oxidation of Toluene
Nanomaterials, 2023 Cu (10 wt%) materials on silica nanotubes were prepared via two different synthetic approaches, co-synthesis and wetness impregnation on preformed SiO2 nanotubes, both as dried or calcined materials, with Cu(NO3)2.5H2O as a material precursor.
Victor Deboos +6 more
doaj +1 more source
Reduction of solid fuel consumption in sintering of Indian iron ore [PDF]
Science of Sintering, 2015 The present investigation deals with the sinterability of Goa (India) iron ore having high Fe (65.2%) content. The sinter basicity (CaO/SiO2) and its MgO were varied in the 2.0 to 2.5 and 1.5 to 3.0 range.
Bhagat R.P.
doaj +1 more source
Cailiao gongcheng, 2020 Ceria-zirconia-alumina composite oxides CZxA (the molar ratios of Ce, Zr and Al are 1:x:2, x=0, 0.5, 1, 1.5 and 2) fresh samples were prepared by the co-precipitation method.
YANG Huang-gen +7 more
doaj +1 more source
Nature Communications, 2019 In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature ...
X. Pereira-Hernández +10 more
semanticscholar +1 more source
Oxygen Vacancies in Oxide Nanoclusters: When Silica Is More Reducible Than Titania
Frontiers in Chemistry, 2019 Oxygen vacancies are related to specific optical, conductivity and magnetic properties in macroscopic SiO2 and TiO2 compounds. As such, the ease with which oxygen vacancies form often determines the application potential of these materials in many ...
Andi Cuko +4 more
doaj +1 more source
New Approach in Research of Quartzes and Quartzites for Ferroalloys and Silicon Production
Metals, 2021 This article deals with material research of selected types of quartz and quartzites in order to determine the priority of their use in the production of ferrosilicon and pure silicon, respectively.
Jaroslav Legemza +3 more
doaj +1 more source