Applications of tomography in the oil-gas industry – Part 2

Xie, Chenggang; Wilt, Michael

doi:10.1016/b978-1-78242-118-4.00023-x

Cited by 1 publication

(1 citation statement)

References 79 publications

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“…Understanding the dynamics of these bubbles is critical when designing fluidized beds. However, owing to their opacity, MRI is one of the few techniques that can be used to study the internal dynamics of a bed [5]. Bubbles rise at approximately 0.1 to 0.3 m s -1 , making it necessary to image on a timescale of approximately 25 ms in order to capture rising bubbles [6].…”

Section: Introductionmentioning

confidence: 99%

Study of bubble dynamics in gas-solid fluidized beds using ultrashort echo time (UTE) magnetic resonance imaging (MRI)

Fabich

Sederman

Holland

2017

Chemical Engineering Science

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Ultrashort echo time (UTE) imaging is commonly used in medical MRI to image 'solid' types of tissue; to date it has not been widely used in engineering or materials science, in part due to the relatively long imaging times required. Here we show how the acquisition time for UTE can be reduced to enable a preliminary study of a fluidized bed, a type of reactor commonly used throughout industry containing short T2 * material and requiring fast imaging. We demonstrate UTE imaging of particles with a T2 * of only 185 μs, and an image acquisition time of only 25 ms. The images are obtained using compressed sensing (CS) and by exploiting the Hermitian symmetry of k-space, to increase the resolution beyond that predicted by the Nyquist theorem. The technique is demonstrated by obtaining one-and twodimensional images of bubbles rising in a model fluidized bed reactor.

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Section: Introductionmentioning

confidence: 99%