Searched for: subject:"Beds"
(1 - 20 of 44)

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Guffanti, S. (author), Visconti, C.G. (author), an Kampen, J. (author), Boon, J. (author), Groppi, G. (author)
Sorption Enhanced DiMethyl Ether Synthesis (SEDMES) is a promising option to overcome thermodynamic limitations of conventional DME production processes. In this work a 2D+1D heterogeneous dynamic model of the reaction/adsorption step in a tube of an externally cooled multitubular fixed bed SEDMES reactor is developed in order to investigate the...
article 2021
document
Mahmoudi, A. (author), Donkers, P.A.J. (author), Walayat, K. (author), Peters, B. (author), Shahi, M. (author)
Salt hydrates are promising candidates for the long-term thermochemical heat storage (TCES) in thebuilding environment. In such storage systems, the surplus of energy will be exploited in an endothermicreaction to dehydrate the salt hydrates. Once it is demanded, the stored energy will be released throughan exothermic reaction by hydrating the...
article 2021
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Munsterman, D.K. (author), Deckers, J. (author)
Based on palynologic interpretations, the Oligocene/Miocene boundary was identified in the cored samples of the ON-Mol-1 and Weelde boreholes in the southern North Sea Basin. In both boreholes, the presumed location of the Oligocene/Miocene boundary is marked by a thin gravel bed, which testifies of a hiatus, within a continuation of shelly,...
article 2020
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Vullings, H.J.L.M. (author)
The Test-bed reference implementation is an open source technical backbone to perform Trials or exercises in a methodical and structured way by offering Crisis Management practitioners a suite of free and open source software tools. This document discusses the Test-bed's usage and design from the perspective of a practitioner. The later chapters...
book 2019
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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
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Dillingh, B. (author), Hayes, G. (author), Hoppenbrouwers, M. (author), Westerwoudt, V. (author), Van Baars, G. (author)
conference paper 2014
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Hamers, H.P. (author), Gallucci, F. (author), Cobden, P.D. (author), Kimball, E. (author), van Sint Annaland, M. (author)
The objective of this work is to study the performance of the oxygen carrier in a packed bed with periodic switching between oxidizing and reducing conditions. In this paper the performance of CuO/Al2O3 as the oxygen carrier in a packed bed reactor with syngas as the fuel are investigated, while also studying the (possible) carbon deposition and...
article 2014
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van Blijderveen, M. (author), Bramer, E.A. (author), Brem, G. (author)
Many municipal waste combustors use preheated primary air in the first zone to dry the waste. In most cases the preheat temperature does not exceed 140°C. In previous experiments it is found that at temperatures around 200°C, in some circumstances, self- or spontaneous ignition can be achieved. Using preheated air can be a powerful tool to...
article 2013
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Kimball, E. (author), Hamers, H.P. (author), Cobden, P.D. (author), Gallucci, F. (author), van Sint Annaland, M. (author)
Chemical Looping Combustion is an alternative technology for CO2 capture. While most systems utilize dual circulating fluidized-beds, this work shows that fixed-bed Chemical Looping Combustion is a feasible configuration for this technology. The inherent separation of the CO2 from the depleted air stream gives a very low efficiency penalty,...
article 2013
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Hamers, H.P. (author), Gallucci, F. (author), Cobden, P.D. (author), Kimball, E. (author), van Sint Annaland, M. (author)
This study reports on the application of chemical looping combustion (CLC) in pressurized packed bed reactors using syngas as a fuel. High pressure operation of CLC in packed bed has a different set of challenges in terms of material properties, cycle and reactor design compared to fluidized bed operation. However, high pressure operation allows...
article 2013
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Kimball, E. (author), Lambert, A. (author), Fossdal, A. (author), Leenman, R.N. (author), Comte, E. (author), van den Bos, W.A.P. (author), Blom, R. (author)
The physio-chemical stability of the oxygen carrier material during chemical looping combustion (CLC) operation is crucial. In the present paper we discuss the challenges connected to operating a metal oxide base material in a cyclic manner between oxidizing and reducing atmospheres. Especially, focus has been put on the phase changes occurring...
article 2013
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Abadjieva, E. (author), van der Heijden, A.E.D.M. (author), Creyghton, Y.L.M. (author), van Ommen, J.R. (author)
Fluorocarbon coatings have been deposited on micron-sized silica particles by means of atmospheric pressure plasma-enhanced chemical vapor deposition (PECVD). The silica particles have a diameter in the range between 40 and 70 ?m. They are fluidized at atmospheric pressure in a circulating fluidized bed combined with a dielectric barrier...
article 2012
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Cristol, X. (author), Jespers, S. (author), Chalindar, B. (author), Juhel, B. (author), Dybedal, J. (author), Eidem, E.J. (author), Ivansson, S. (author), van Vossen, R. (author), Ainslie, M.A. (author), Andersson, B.L. (author), Colin, M.E.G.D. (author), Pihl, J. (author)
The European Defence Agency project RUMBLE-2 (ref.[1]) offered the opportunity for investigating experimentally acoustic reverberation at about 1.kHz, under grazing incidence (less than about 20°), from very porous clayey seafloors of a continental shelf (mean grain size spanning from about 7 to 10 in  units); the instrument was an operational,...
conference paper 2012
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Abrahamsson, L. (author), Andersson, B.L. (author), Ivansson, S. (author), Pihl, J. (author), Chalindar, B. (author), Cristol, J.X. (author), Juhel, B. (author), Eidem, E.J. (author), Dybedal, J. (author), Olsen, G.K. (author), Ainslie, M.A. (author), Benders, F.P.A. (author), Colin, M.E.G.D. (author), van Vossen, R. (author)
An operational low-frequency active sonar system has been used in the EDA (European Defence Agency) project Rumble-2 to collect reverberation data at sea trials in the North Sea. Using a fast ray model for the forward computations, the reverberation data are inverted to determine bottom parameters: Lambert back-scattering parameter μ and sound...
conference paper 2012
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van Blijderveen, M. (author), Bramer, E.A. (author), Brem, G. (author)
To gain insight in the startup of an incinerator, this article deals with piloted ignition. A newly developed model is described to predict the piloted ignition times of wood, PMMA and PVC. The model is based on the lower flammability limit and the adiabatic flame temperature at this limit. The incoming radiative heat flux, sample thickness and...
article 2012
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van Vossen, R. (author), Colin, M. (author), Benders, F. (author), Ainslie, M.A. (author), Eidem, E.J. (author), Chalindar, B. (author), Juhel, B. (author), Dybedal, J. (author), Olsen, G.K. (author), Ivansson, S. (author), Abrahamsson, L. (author)
Accurate environmental information is required for obtaining reliable predictions for the performance of low-frequency active sonar (LFAS) systems. This environmental information is, however, often unreliable or unavailable. For example, the acoustic seabed parameters relevant for the scattering and reflection of sound at the seabed are commonly...
conference paper 2011
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Williams, K.L. (author), Kargl, S.G. (author), Thorsos, E.I. (author), Burnett, D.S. (author), Lopes, J.L. (author), Zampolli, M. (author), Marston, P.L. (author), TNO Defensie en Veiligheid (author)
Understanding acoustic scattering from objects placed on the interface between two media requires incorporation of scattering off the interface. Here, this class of problems is studied in the particular context of a 61 cm long, 30.5 cm diameter solid aluminum cylinder placed on a flattened sand interface. Experimental results are presented for...
article 2010
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van Blijderveen, M. (author), Gucho, E.M. (author), Bramer, E.A. (author), Brem, G. (author), TNO Industrie en Techniek (author)
Many municipal waste combustors use preheated primary air in the first zone to dry the waste. In most cases the preheat temperature does not exceed 140 °C. In previous experiments it is found that at temperatures around 200 °C, in some circumstances, self- or spontaneous ignition can be achieved. Using preheated air can be a powerful tool to...
article 2010
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de Weert, J. (author), Streminska, M. (author), Hua, D. (author), Grotenhuis, T. (author), Langenhoff, A. (author), Rijnaarts, H. (author), TNO Bouw en Ondergrond (author)
Purpose: Sediments can function as secondary source for water pollution of aerobically biodegradable non-halogenated organic compounds, which are persistent in anaerobic sediments. The mass transfer of compounds from sediment to bulk water depends on hydraulic conditions. In this study, desorption, mass transfer and biodegradation are...
article 2009
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van Bergen, F. (author), Winthaegen, P. (author), Pagnier, H. (author), Krzystolik, P. (author), Jura, B. (author), Skiba, J. (author), van Wageningen, N. (author), TNO Bouw en Ondergrond (author)
A pilot site for CO2 storage in coal seams was set-up in Poland, as has been reported on previous GHGT conferences. This site consisted of one injection and one production well. About 760 ton of CO2 has been injected into the reservoir from August 2004 to June 2005. Breakthrough of the injected CO2 was established, which resulted in the...
article 2009
Searched for: subject:"Beds"
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