Results 1 to 10 of about 197,986 (311)

Solid diffusion control of the adsorption of basic dyes onto granular activated carbon and natural zeolite in fixed bed columns [PDF]

open access: yesJournal of the Serbian Chemical Society, 2001
The adsorption of basic dyes from aqueous solutions onto granular activated carbon and natural zeolite was studied using a fixed bed column. The design procedures for fixed bed adsorption columns were investigated for two basic dyes Maxilon ...
Markovska L.   +3 more
doaj   +5 more sources

New insight for the diffusion–resupply kinetics of Cr(VI) in contaminated soil using DGT/DIFS

open access: yesEcotoxicology and Environmental Safety, 2022
Chromium (Cr) is a widespread pollutant with high toxicity and mobility. However, the diffusion–resupply kinetics of Cr(VI) between the solid phase and solution in the soils remain unclear.
Bo Gao, Li Gao, Dongyu Xu
doaj   +1 more source

Multidimensional encoding of restricted and anisotropic diffusion by double rotation of the q vector [PDF]

open access: yesMagnetic Resonance, 2023
Diffusion NMR and MRI methods building on the classic pulsed gradient spin-echo sequence are sensitive to many aspects of translational motion, including time and frequency dependence (“restriction”), anisotropy, and flow, leading to ambiguities when ...
H. Jiang, L. Svenningsson, D. Topgaard
doaj   +1 more source

Tailoring atomic diffusion for in situ fabrication of different heterostructures

open access: yesNature Communications, 2021
Atomic diffusion is a powerful tool for the synthesis of heterostructures, even though controlled atomic diffusion is difficult to achieve. Here, the authors control solid-solid atomic diffusion between an Ag nanowire and a Te nanowire, producing 1D ...
Hui Zhang   +5 more
doaj   +1 more source

Kinetic Analysis of Isothermal and Non-Isothermal Reduction of Iron Ore Fines in Hydrogen Atmosphere

open access: yesMetals, 2022
Direct reduction of iron ore with H2 has become an alternative technology for iron production that reduces pollutant emissions. The reduction kinetics of iron ore fines in an H2 atmosphere under isothermal and non-isothermal conditions were studied by ...
Binbin Lyu   +5 more
doaj   +1 more source

Liquid phase sintering, II: Computer study of skeletal settling and solid phase extrication in a microgravity environment [PDF]

open access: yesScience of Sintering, 2008
A two-dimensional numerical method based on the Brownian motion model and on the Densification model for simulation of liquid phase sintering in microgravity environment will be developed.
Nikolić Z.S.
doaj   +1 more source

Cure reaction modelling for thermosetting resin having two-step reaction peaks

open access: yesNihon Kikai Gakkai ronbunshu, 2020
When thermosetting resin changes from liquid to solid in cure process, the elasticity and volume also vary with the degree of reaction based on the tempearture history.
Hiroki NAKATSUCHI, Yuri KAJIHARA
doaj   +1 more source

Dynamic studies of nitrophenols sorption on perfil in a fixed-bed column

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2008
The adsorption of two substituted nitrophenols, namely 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP), from aqueous solutions onto perfil was studied using a fixed bed column.
Zvezdelina Yaneva   +4 more
doaj   +1 more source

Analytical solutions for the temperature field in a 2D incompressible inviscid flow through a channel with walls of solid fuel [PDF]

open access: yesINCAS Bulletin, 2011
A gas (oxidizer) flows between two parallel walls of solid fuel. A combustion is initiated: the solid fuel is vaporized and a diffusive flame occurs. The hot combustion products are submitted both to thermal diffusion and convection. Analytical solutions
Sorin BERBENTE   +2 more
doaj   +1 more source

Calculating the conversion of a diffusion controlled solid-solid reaction.

open access: yesJournal of the Society of Powder Technology, Japan, 1985
Volumetric conversion of a solid-solid reaction, in which solid particles of one component are randomly packed with particles of the other component, is calculated with a model in which the reaction proceeds by mutual diffusion through the contacting points.Two periods are considered, i.
SHIRAI, Masahiro, TANAKA, Tatsuo
openaire   +2 more sources

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