在气体-固体流体化床中线上检测床流动性,使用近红外光谱学
Hao Fu1,2, Kaixuan Teng1,2, Jie Zhao1
1Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
Pharmaceutics
|September 28, 2023
概括
近红外 (NIR) 光谱学通过分析空隙和波动,有效地检测气体固体流化床流动性. 这种新的方法使用泡比例和斜率指标进行可靠的流化质量评估.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 频谱学是一种光谱学.
- 流体动力学 流体动力学
背景情况:
- 气固体流体化床在工业过程中至关重要.
- 监测流化质量对于工艺效率和安全至关重要.
- 评估床流动性的传统方法可能是复杂和侵入性的.
研究的目的:
- 开发一种新的,非侵入性的方法来检测气体固体流体化床中的床流动性.
- 为了利用分散反射近红外 (NIR) 光谱学进行水力动力学表征.
- 建立可靠的指标来量化流体化质量,并允许提前警告脱液化.
主要方法:
- 扩散反射近红外 (NIR) 光谱法用于测量床空隙.
- 分析了NIR光谱基线波动,以得出两个关键指标:泡比例和斜率.
- 在不同的静态床高度和颗粒大小下,研究了这些指标与床流动性的关系.
- 确定了一个通用值,以区分差的和良好的床流动性,最小的错误概率.
主要成果:
- 泡比例和斜度指标都显示出对床流动性变化的敏感性.
- 斜率指标在检测不同条件下的床流动性方面被证明是有效的,强大的值为1.20.
- 开发的NIR方法在实验室规模的流化床颗粒化过程中成功监测了床流动性.
- 该系统为脱液事件提供了早期预警.
结论:
- 扩散反射NIR光谱为监测气体-固体流化层中的床流动性提供了一种可行和敏感的方法.
- 由此产生的指标,特别是斜率,为评估流化质量和检测流化不良提供了可靠的手段.
- 这种非侵入性技术在工业过程中具有实际应用,包括颗粒化,用于实时监控和过程控制.
更多相关视频
11:38In 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
16.0K
10:31Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
Published on: May 8, 2015
13.8K
相关概念视频
Gas Chromatography: Types of Detectors-II
413
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...
413
Gas Chromatography: Types of Detectors-I
470
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
470
Flame Photometry: Lab
272
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
272
Flame Photometry: Overview
649
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
649
Infrared (IR) Spectroscopy: Overview
1.9K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Different compounds display unique properties due to their...
1.9K
