Infrared Structural Parameter Method for Coal Quality Analysis

Abstract

The present invention relates to an infrared structural parameter method for coal quality analysis, which mainly solves the problem that the current conventional coal quality analysis method cannot effectively characterize the macromolecular bonding structure of coal, so it cannot effectively predict and evaluate the reactivity of coal in the thermochemical conversion process It is a convenient, stable, reasonable, comprehensive and universal coal quality analysis method to characterize the bonding structure of real coal macromolecules; ‑1 The original infrared spectrum in the wavenumber range is divided into six bands, and then the baseline of each band is defined, and the original spectral line of each band is processed by curve fitting, and several fitting sub-peaks are decomposed, and then each fitting sub-peak is calculated. Finally, construct and calculate a series of scientifically reasonable and clear-cut infrared structural parameters. By comparing the relative values ​​of the above-mentioned infrared structural parameters of different coal samples, we can analyze each coal from the level of molecular structure. Comprehensive analysis and evaluation of coal quality characteristics of samples.

Description

technical field [0001] The invention belongs to the technical field of energy and environment, and relates to the supplement and innovation of the currently widely used coal quality analysis method, in particular to an infrared structural parameter method for coal quality analysis. Background technique [0002] The relationship between the structure and reactivity of coal is the core issue in the field of coal chemistry research. It is not only an important expansion of basic research related to chemical science, but also the basis for the development and progress of many coal processing and conversion technologies, such as gasification, coking, and liquefaction technologies. theoretical basis. To explore the relationship between coal structure and reactivity, the fundamental premise is to realize the effective characterization of the two. However, due to the complexity of coal components and the diversity of coal types, there is no method that can effectively analyze the r...

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Problems solved by technology

Therefore, all current infrared spectroscopic analysis cannot achieve a complete characterization of coal quality characteristics

[0007] 2. There are defects in the characterization method of coal quality characteristics

However, in the actual KBr tablet preparation process, due to errors in the weighing process, insufficient mixing in the grinding process, and non-absolute flatness in the tableting process, the above prerequisites for the application of the Beer-Lambert principle become almost impossible to achieve

Therefore, the significance of directly comparing the absorption peak intensities of different coal samples is very limited

[0008] 3. Insufficient universality and convenience of method application

However, there are no clear guidelines for the selection of suitable reference materials, and many times reference materials and their spectra are difficult to obtain

In addition, the infrared quantitative analysis process is also affected by the errors of each link in the preparation of KBr tablets, and additional chemical analysis methods are required as an auxiliary method.

The above factors have weakened the universality and convenience of these infrared analysis methods in the field of coal quality analysis.

[0009] 4. The infrared structural parameters used are not rich enough and need to be supplemented urgently

[0010] 5. The construction of some infrared structural parameters is not very reasonable

[0011] In summary, so far, there has not been a reasonable, effective, comprehensive and universal method for characterizing the bonding structure of real coal macromolecules worldwide.

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