Related Experiment Video
Updated: Jun 12, 2026
11:38
In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
Optoelectronic technique for the characterization of high concentration gas-solid suspension
Applied Optics
|June 22, 2010
Summary
This study presents a straightforward laser light scattering method for accurately measuring high solids concentrations in two-phase flows. This technique is valuable for analyzing particle flow in fluidized beds.
Area of Science:
- Fluid dynamics
- Optical measurement techniques
- Particle characterization
Background:
- Accurate measurement of solids concentration in two-phase flows is crucial for process control and understanding.
- Existing methods may have limitations in handling high concentrations or specific flow regimes.
- Fluidized beds, both bubbling and circulating, present unique challenges for flow diagnostics.
Purpose of the Study:
- To introduce a simple and effective technique for measuring high time-averaged solids volumetric concentration (up to 0.16) in two-phase flows.
- To demonstrate the applicability of the technique in practical configurations, specifically for fluidized bed applications.
- To determine the extinction coefficient of the solid materials used.
Main Methods:
- Utilizing a modified forward scattering of laser light technique.
- Applying the method to measure solids concentration in various practical setups.
- Conducting measurements in the freeboard of bubbling fluidized beds and in circulating fluidized beds.
Main Results:
- Successfully measured high solids volumetric concentrations up to 0.16.
- Validated the technique's utility in complex flow environments like fluidized beds.
- Obtained measurements of the extinction coefficient for the tested solid materials.
Conclusions:
- The described laser light scattering technique offers a simple and robust solution for high solids concentration measurement in two-phase flows.
- The method is particularly well-suited for the diagnostics of particle flow in bubbling and circulating fluidized beds.
- The technique also provides a means to determine the extinction coefficient of particulate matter.
More Related Videos
Related Concept Videos
01:15High-Performance Liquid Chromatography: Types of Detectors
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
01:13Gas Chromatography: Introduction
Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
01:19Gas Chromatography: Types of Detectors-II
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
01:14Gas Chromatography–Mass Spectrometry (GC–MS)
Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...
01:20Capillary Electrophoresis: Instrumentation
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
01:28Adsorption of Gases on Solids
Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...