Searched for: subject:"Mechanical%5C+permeability"
(1 - 15 of 15)
document
Gezici-Koc, Ö. (author), Erich, S.J.F. (author), Huinink, H.P. (author), van der Ven, L.G.J. (author), Adan, O.C.G. (author)
In addition to the desired aesthetical properties, a coating is applied to protect against weathering. A coating prevents moisture accumulation in wood by reducing the water uptake into the wood by its barrier function. The studies in the coating permeability has gained interest with the shift towards waterborne coatings, which make coatings...
article 2019
document
Gezici-Koç, Ö. (author), Erich, S.J.F. (author), Huinink, H.P. (author), van der Ven, L.G.J. (author), Adan, O.C.G. (author)
An important reason to apply coatings on wood is to protect wood against moisture. As a result of regulations and ecological concerns, there has been a shift towards waterborne coatings, which make coatings intrinsically more sensitive to water. As a consequence of the higher sensitivity to water, the durability of both wood and coatings can be...
article 2018
document
Rodriguez-Illera, M. (author), Boon, M.A. (author), Boom, R.M. (author), Janssen, A.E.M. (author)
We present guidelines for the configuration of industrial scale chromatographic separationof small molecules. We compared the performance of different axial packed beds, chan-neled monoliths and a continuous monolith assuming silica as base material. The calculatedmass transfer rates were used to calculate the height of a theoretical plate (HETP...
article 2015
document
ter Heege, J.H. (author), Zijp, M.H.A.A. (author), de Bruin, G. (author), ten Veen, J.H. (author)
Uncertainties in upfront predictions of hydraulic fracturing and gas production of underexplored shale gas targets are important as often large potential resources are deduced based on limited available data. In this paper, uncertainties are quantified by using normal distributions of different input parameters in wellbased models for hydraulic...
conference paper 2014
document
Donkers, P.A.J. (author), Huinink, H.P. (author), Erich, S.J.F. (author), Reuvers, N.J.W. (author), Adan, O.C.G. (author)
Coatings are used in a variety of applications. Last decades more and more coating systems are transforming from solvent to waterborne coating systems. In this study the influence of pigments on the water permeability of a waterborne coating system is studied, with special interest in the possible interfacial layer of additives around the...
article 2013
document
Brouwer, G.K. (author), Fokker, P.A. (author), Wilschut, F. (author), Zijl, W. (author), TNO Bouw en Ondergrond (author)
The determination of the permeability field from pressure and flow rate measurements in wells is a key problem in reservoir engineering. This paper presents a Double Constraint method for inverse modeling that is an example of direct inverse modeling. The method is used with a standard block-centered finite difference method. With an a priori...
article 2008
document
Zijl, W. (author), TNO Bouw en Ondergrond (author)
Homogeneous effective permeabilities in the near-well region are generally obtained using analytical solutions for transient flow. In contrast, this paper focuses on heterogeneous permeability obtained from steady flow solutions, although extensions to unsteady flow are introduced too. Exterior calculus and its discretized form have been used as...
article 2007
document
Cherrie, J.W. (author), Semple, S. (author), Brouwer, D. (author), TNO Voeding (author)
There are standardized laboratory tests for chemical protective gloves that provide estimates of breakthrough time and steady-state permeation flux. However, there is evidence to suggest that these tests may not be completely relevant to glove usage in the workplace. There is no consensus about how glove workplace effectiveness should be...
article 2004
document
Zijl, W. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)
Inverse models to determine the permeability are generally based on existing forward models for the pressure. The permeabilities are adapted in such a way that the calculated pressures match the specified pressures in a number of points. To assimilate a priori knowledge about the flux, we introduce the 'flux assimilation method', which is based...
article 2004
document
Huisman, I.H. (author), Prádanos, P. (author), Hernández, A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
It was studied how protein-protein and protein-membrane interactions influence the filtration performance during the ultrafiltration of protein solutions over polymeric membranes. This was done by measuring flux, streaming potential, and protein transmission during filtration of bovine serum albumin (BSA) solutions at various pH values using...
article 2000
document
Brocken, H.J.P. (author), Larbi, J.A. (author), Pel, L. (author), van der Pers, N.M. (author), TNO Bouw (author)
The formation of cured mortar structure in masonry was studied using multiple experimental techniques. Starting with fresh mortar, nuclear magnetic resonance (NMR) was used to measure the water extraction during brick laying. After curing, the composition of cured mortar was investigated with polarizing and fluorescent microscopy (PFM) and X-Ray...
article 1999
document
Keizer, K. (author), Burggraaf, A.J. (author), Vroon, Z.A.E.P. (author), Verweij, H. (author), Technisch Physische Dienst TNO - TH (author)
Two component permeation measurements have been performed by the Wicke-Kallenbach method on a thin (3 μm) zeolite MFI (Silicalite-1) membrane with molecules of different kinetic diameters, d(k). The membrane was supported by a flat porous α-Al2O3 substrate. The results obtained could be classified in six regimes based on differences in:...
article 1998
document
Burggraaf, A.J. (author), Vroon, Z.A.E.P. (author), Keizer, K. (author), Verweij, H. (author), Technisch Physische Dienst TNO - TH (author)
The permeation of a series of gases with widely different Lennard-Jones kinetic diameters and sorption properties is investigated as a function of feed pressure (up to 100 kPa) and temperature (298-473 K) with two different methods. The membrane system studied consists of an MFI (silicalite) top-layer (thickness 3 μm) directly grown on an α...
article 1998
document
de Vries, J. (author), Polder, R.B. (author), TNO Bouw (author)
As part of the maintenance policy of the dutch Ministry of Transport, Civil Engineering Division, hydrophobic treatment of concrete was considered as an additional protective measure against penetration of aggressive substances, for instance deicing salts in bridge decks. A set of tests was designed to determine the performance of commercial...
article 1997
document
Alkemade, M.M.C. (author), Koene, J.I.A. (author), TNO Milieu, Energie en Procesinnovatie (author)
An immobilization process is described which is based on sulphur (instead of cement) as a binding agent for the treatment of hazardous waste materials. Elemental sulphur is able to bind chemically metals such as mercury and, to a lesser extent, lead as metal sulphides. Furthermore, sulphur forms a compact solid mass that has a low permeability,...
article 1996
Searched for: subject:"Mechanical%5C+permeability"
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