Recent advances in in-process characterization of suspensions and slurries

Scott, D. M.

doi:10.1016/j.powtec.2022.117159

Cited by 18 publications

(8 citation statements)

References 157 publications

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“…More generally, ultrasonics are increasingly a critical technique for the in-process evaluation of multiphase mixing and transfer systems in a variety of industries. 10,11 Acoustic devices for measuring particle size and concentration are generally used in either a forward transmission or a backscatter setup. In transmission, an ultrasonic signal is generated by one transmitter, and the signal is "caught" by a separate receiver.…”

Section: Introductionmentioning

confidence: 99%

“…Acoustic devices represent a promising technique, as they are used extensively to measure sediment transport in estuarine environments and, by appropriate adjustment of frequency range, size, and concentration, can also be utilized nondestructively and nonintrusively. , In nuclear applications, ultrasonics have been used for in situ bed profiling , and nondestructive testing but have not been applied for concentration measurements. More generally, ultrasonics are increasingly a critical technique for the in-process evaluation of multiphase mixing and transfer systems in a variety of industries. , …”

Section: Introductionmentioning

confidence: 99%

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Characterizing Flocculated Mineral Sediments with Acoustic Backscatter, Using Solid and Hybrid Scattering Models

Tonge,

Peakall,

Lockwood

et al. 2023

Ind. Eng. Chem. Res.

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This study investigated the performance of an acoustic backscatter system (ABS) for the in situ particle characterization of complex wastes. Two sediments were used: a fine, milled calcite that was flocculated with anionic polyacrylamide and naturally flocculated pond sludge. Particles were initially measured independently by light-based techniques to gain size, the coefficient of variation (COV), and fractal dimensions. For acoustic experiments, a bespoke, high-fidelity ABS was employed with 1, 2.25, and 5 MHz probes and a recirculating mixing tank. Initially, the concentration independent attenuation and backscatter coefficients were measured for each system using a robust calibration procedure at multiple concentrations. Comparisons of the total scattering cross-section (χ) and form function (f) were made between the experimental data and two semiempirical models: a Solid Scattering model and a Hybrid model (where the effects of bound fluid are incorporated). Experimental data compared more closely to the Solid Scattering model, as it was assumed scattering was dominated by small, bound “flocculi” rather than the macroscopic structure. However, if the COV was used as a fit parameter, the hybrid model could give equally accurate fits for a range of input aggregate sizes, highlighting that important size and structure information can be gained from the acoustic models if there is some a priori system data. Additionally, dual-frequency inversions were undertaken to measure concentration profiles for various frequency pairs. Here, the lowest frequency pair gave the best performance (with accurate measurements in the range of 2–35 g·L–1) as interparticle scattering was lowest.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterizing Flocculated Mineral Sediments with Acoustic Backscatter, Using Solid and Hybrid Scattering Models

Tonge,

Peakall,

Lockwood

et al. 2023

Ind. Eng. Chem. Res.

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“…Due to the underlying physical and chemical differences and challenges, various instrumentation has been employed to monitor the course of the crystallization processes [3,4]. Collectively, crystallization monitoring and particle characterization techniques are called as process analytical technology (PAT) [5,6].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Visualization of Crystallization Processes Using Electrical Resistance Tomography: CaCO3 and Sucrose Crystallization Case Studies

Rao¹,

Aghajanian²,

Zhang³

et al. 2022

Preprint

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In the current research work, electrical resistance tomography (ERT) was employed for crystallization process monitoring and visualization. A first-of-its-kind MATLAB-based interactive GUI application “ERT-Vis” is presented. Two case studies involving varied crystallization methods were undertaken. The experiments involving calcium carbonate reactive (precipitative) crystallization for the high conductivity solution-solute media and the cooling crystallization for sucrose crystallization representing the lower conductivity solution-solute combination were designed and performed. The software successfully provided key insights regarding the process progress in both crystallization systems. It could detect and separate the crystal agglomerations in the low as well as high conductivity solutions using visual analytics tools provided. The performance and utility of the software were studied using a software evaluation case study involving domain experts. Participant feedback indicated that ERT-Vis software helps in reconstructing images instantaneously, interactively visualizing, and evaluating the output of the crystallization process monitoring data.

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“…Due to the underlying physical and chemical differences, and certain operational challenges, various instrumentation has been employed to monitor the course of crystallization processes [5,6]. Collectively, crystallization monitoring and particle characterization techniques are known as process analytical technology (PAT) [7,8].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Visualization of Crystallization Processes Using Electrical Resistance Tomography: CaCO3 and Sucrose Crystallization Case Studies

Rao

Aghajanian

Zhang

et al. 2022

Sensors

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In the current research work, electrical resistance tomography (ERT) was employed for monitoring and visualization of crystallization processes. A first-of-its-kind MATLAB-based interactive GUI application “ERT-Vis” is presented. Two case studies involving varied crystallization methods were undertaken. The experiments were designed and performed involving calcium carbonate reactive (precipitative) crystallization for the high conductivity solution-solute media, and the cooling crystallization of sucrose representing the lower conductivity solution–solute combination. The software successfully provided key insights regarding the process in both crystallization systems. It could detect and separate the solid concentration distributions in the low as well as high conductivity solutions using the visual analytics tools provided. The performance and utility of the software were studied using a software evaluation case study involving domain experts. Participant feedback indicated that ERT-Vis software helps by reconstructing images instantaneously, interactively visualizing, and evaluating the output of the crystallization process monitoring data.

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Recent advances in in-process characterization of suspensions and slurries

Cited by 18 publications

References 157 publications

Characterizing Flocculated Mineral Sediments with Acoustic Backscatter, Using Solid and Hybrid Scattering Models

Characterizing Flocculated Mineral Sediments with Acoustic Backscatter, Using Solid and Hybrid Scattering Models

Monitoring and Visualization of Crystallization Processes Using Electrical Resistance Tomography: CaCO3 and Sucrose Crystallization Case Studies

Monitoring and Visualization of Crystallization Processes Using Electrical Resistance Tomography: CaCO3 and Sucrose Crystallization Case Studies

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