对ATR和扩散反射率中红外光谱学进行煤炭特性分析的比较和探索性研究
Yu Liu1, Jing-Yan Li1, Yu-Peng Xu1
1Sinopec Research Institute of Petroleum Processing Co., LTD., Beijing 100083, China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|January 17, 2026
概括
本研究比较了中红外采样方法,减弱总反射率 (ATR) 和分散反射率FTIR (DRF),用于快速煤炭分析. 高级数据融合改善了大多数属性的预测,为煤炭质量评估提供了指导.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 地质科学是地球科学.
背景情况:
- 精确和快速的煤炭质量评估对能源行业至关重要.
- 中红外光谱 (MIR) 提供了快速,非破坏性分析的潜力.
- 不同的采样几何形状,如减弱总反射率 (ATR) 和分散反射率FTIR (DRF),可能会影响分析性能.
研究的目的:
- 在煤炭分析中系统地比较ATR和DRF采样几何学中红外里叶变换红外光谱 (FTIR).
- 评估多式联运数据融合在不同级别 (低,中,高) 的好处,以提高预测准确性.
- 建立一个统一的框架,用于在煤炭质量评估中对采样几何和聚变策略进行基准测试.
主要方法:
- 使用ATR和DRFFTIR光谱学分析了200个煤样.
- 预处理包括扩展的乘法散射校正 (EMSC),波长选择和部分最小平方 (PLS) 回归.
- 采样几何学的系统基准测试和三个级别的数据融合 (低,中,高).
主要成果:
- 分散反射率FTIR (DRF) 提供了优越的灰预测,而减弱总反射率 (ATR) 在挥发物质和水分预测方面表现出色.
- 热值和固定碳预测在ATR和DRF之间是可比的.
- 对于这两种方法来说,硫的预测仍然具有挑战性.
- 高级数据融合在六个属性中的五个中始终提高了预测准确度,而低级和中级数据融合没有显著的好处.
结论:
- 在ATR和DRF之间做出选择取决于正在分析的特定煤炭属性.
- 高级数据融合ATR和DRF频谱可以增强FTIR光谱学用于煤炭质量评估的预测能力.
- 本研究为选择最佳的FTIR模式和用于常规煤炭分析的聚变策略提供了实际指导.
相关概念视频
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
1.2K
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
1.2K
Applications of IR Spectroscopy: Overview
2.1K
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
2.1K
Infrared (IR) Spectroscopy: Overview
4.7K
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...
4.7K
IR Spectrometers
2.4K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.4K
Atomic Absorption Spectroscopy: Overview
3.3K
Atomic absorption spectroscopy (AAS) is a technique used to analyze elements by measuring electromagnetic radiation (EMR) absorbed by atoms, which causes them to transition to a higher-energy orbit. The most crucial step in AAS is atomization, where the analyte is converted into gas-phase atoms, typically through a flame or furnace. Some of these atoms become thermally excited in the flame, while most remain in the ground state.
When irradiated by EMR of a particular wavelength, these...
When irradiated by EMR of a particular wavelength, these...
3.3K
Atomic Absorption Spectroscopy: Lab
1.0K
For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
1.0K


