Characterization of Chemical Looping Pilot Plant Performance via Experimental Determination of Solids Conversion

2009 ◽  
Vol 23 (3) ◽  
pp. 1450-1455 ◽  
Author(s):  
Philipp Kolbitsch ◽  
Tobias Pröll ◽  
Johannes Bolhar-Nordenkampf ◽  
Hermann Hofbauer
Keyword(s):  
Experimental Determination ◽  
Pilot Plant ◽  
Plant Performance ◽  
Chemical Looping

Experimental Determination Of Relaxation Of Interphase Interfaces In Oxide Eutectics

1991 ◽  
Vol 238 ◽  
Author(s):  
Vinayak P. Dravid ◽  
V. Ravikumar ◽  
G. Dhalenne ◽  
A. Revcolevschi
Keyword(s):  
Experimental Determination ◽  
Interface Structure ◽  
Low Energy ◽  
Three Dimensions ◽  
Directionally Solidified ◽  
Lamellar Morphology ◽  
Analytical Tem ◽  
Directionally Solidified Eutectics

ABSTRACTInterphase interfaces in the directionally solidified eutectics.(DSEs) of NiO-ZrO2(CaO), NiO-Y2O3 and MnO-ZrO2 have been investigated using a variety of TEM techniques. The unique lamellar morphology of the DSEs allows characterization of interfaces and identification of relaxations along multiple directions, aiding visualization of interface structure in three dimensions. Possible low energy interface orientations were identified through examination of facets. The low energy interface planes almost invariably correspond to polar surfaces of adjacent crystals. An attempt has been made to experimentally identify the variety of interfacial relaxation mechanisms using a variety of analytical TEM techniques and only HRTEM results are summarized in this paper. It was found that most of the DSE systems exhibit very little relaxation and possess tight interface cores.

scholarly journals Some problems of characterization of a solid surface via the surface free energy changes

2017 ◽  
Vol 35 (7-8) ◽  
pp. 647-659 ◽  
Author(s):  
Emil Chibowski
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Experimental Determination ◽  
Surface Free Energy ◽  
Solid Surface ◽  
Contact Angles ◽  
Absolute Value ◽  
Receding Contact

During the processes occurring at a solid surface, the changes in the surface free energy take place. The knowledge about surface free energy is very helpful for understanding the processes taking place on the surface. However, experimental determination of solid surface free energy is still not a fully solved problem. In this paper, some problems dealing with calculation of solid surface free energy from contact angle are discussed based on literature values of advancing and receding contact angles measured on four different fluoropolymers surface. The four approaches most often used for the calculation are described and especial focus on the approach in which both the advancing and receding contact angles is paid. It is concluded that using probing liquids the absolute value of solid surface free energy cannot be determined. However, the determined apparent values of the energy are very helpful to understand the conditions necessary for a given process to occur.

Experimental Determination of the Permeability of Non-Porous Planar Structures during Operation of Equipment in Own Industrial Unit

2012 ◽  
Vol 727-728 ◽  
pp. 1836-1841 ◽  
Author(s):  
Sandra Mara Santana Rocha ◽  
Luiz Gustavo Martins Vieira
Keyword(s):  
Experimental Determination ◽  
Physical Property ◽  
Manufacturing Plant ◽  
Porous Structures ◽  
Filter Media ◽  
Planar Structures ◽  
Operation Costs ◽  
Industrial Unit

The permeability is a physical property related to porous structures. It is a physical quantity that quantifies the resistance that a permeable matrix has to the flow of a particular fluid. Knowledge of the permeability of a filter media is important for the design, optimization and operation of various equipment, such as fabric filters, sedimentary, filtering hydrocyclones and others. There is the routine that the experimental determination of permeability of a filter medium is not made during the operation of industrial equipment, because they require a specific instrumentation or because it not presents a flat filtration. Therefore the experimental determination of permeability occurs out the industrial, in testing of laboratory by flat filtration. The two different times (industrial and laboratory) increase operation costs for the user by requiring uninstalling or fragmentation of the equipment to take it the laboratory. This work aimed to present a methodology (experiments combined with CFD techniques) in which it is possible to determine the permeability of a filter media (non-flat geometry) in their own manufacturing plant. According to the main results achieved, the proposed methodology was satisfactory, eliminating the need for characterization of filter media in the laboratory.

Experimental Characterization of Contact Hysteresis at High Temperatures

2006 ◽  
Author(s):  
Sergio Filippi ◽  
Esequiel B. Rodrigues ◽  
Muzio M. Gola
Keyword(s):  
Friction Coefficient ◽  
Experimental Determination ◽  
Measurement System ◽  
Experimental Characterization ◽  
Test Rig ◽  
Tangential Load ◽  
Wide Range ◽  
Induction System

The current paper presents a measurement system for the experimental determination of contact hysteresis cycles at temperatures up to 800° C. A test rig was designed to conduct experiments in a wide range of temperatures, with different combinations of normal and tangential load, frequencies and contacting materials. An induction system supplies the heat for measurements of hysteresis cycles at the required temperatures. Measurements show the dependence of the friction coefficient on temperature.

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