Observations of fluidized bed coalescence using capacitance imaging

Applications of capacitance tomography in gas–solid fluidized bed systems

“…The first investigations on capacitance measuring techniques can be traced back to the 1980s in the Morgantown Energy Technology Center (METC) of the US Department of Energy (Halow & Nicoletti, 1992). Starting from the early 1990s, ECT systems have been used to investigate multiphase flow phenomena (Halow, Fasching, Nicoletti, & Spenik, 1993;Huang, Plaskowski, Xie, & Beck, 1989).…”

Measurement of mass transfer between the bubble and dense phases in a fluidized bed combustor

“…Also values for ⌬z min between 2D and 4D can be estimated [33]. Halow and Nicoletti [34] also found that bubbles rise faster when separated by less than 1 to 2.5 bubble diameters. Values of the ratio of ⌬z 0 …”

Sensor design and image accuracy for application of capacitance CT to the petroleum refinery process

“…Based on the permittivity distribution in the cross-section, the powder concentration distribution is obtained via a reconstruction technique [7]. This system has been applied in industry for fluidized bed coalescence [8], bubble formation [9], and pneumatic conveyance [10], for example. Tortora et al compared the FCC catalyst powder concentration obtained by electrical CT and Gamma Densitometry Tomography in the petroleum refinery process, and reported that they agreed well [11].…”