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Infrared Structural Parameter Method for Coal Quality Analysis

A technology of structural parameters and coal quality analysis, applied in the field of energy and environment, can solve the problems of lack of universality and convenience, the difficulty of obtaining standard substances and their spectra, and the impossibility of realization, so as to ensure universality and convenience , to ensure stability and scientific, repeatable results

Active Publication Date: 2021-06-29
SHENYANG ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Infrared Structural Parameter Method for Coal Quality Analysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The dry base industrial analysis and elemental analysis data of a lignite sample are shown in Table 1.

[0091] The drying base industrial analysis and elemental analysis data of table 1 embodiment 1 coal sample

[0092]

[0093] a Calculated by subtraction

[0094] According to the specific operation steps (1)~(7) described before the present invention, in conjunction with the specific situation of this coal sample, complete the infrared structure parameter analysis of this coal sample according to the following methods:

[0095] (1) KBr pellet method was used to prepare coal samples for infrared spectroscopy test. The sample and KBr were first mixed thoroughly at a mass ratio of 1:200, then 200 mg of the mixture was made into an infrared tablet under a pressure of 10-12 MPa, and finally the tablet was dried in a thermostat at 50°C for at least 48 hours to ready for testing. The test wavenumber range of Fourier transform infrared spectrometer is 4000~400cm -1 ,...

Embodiment 2

[0137] The dry base industrial analysis and elemental analysis data of a bituminous coal sample are shown in Table 4.

[0138] Dry base industrial analysis and elemental analysis data of table 4 embodiment 2 coal sample

[0139]

[0140] a Calculated by subtraction

[0141] According to the specific operation steps (1)~(7) described before the present invention, in conjunction with the specific situation of this coal sample, complete the infrared structure parameter analysis of this coal sample according to the following methods:

[0142] (1) KBr pellet method was used to prepare coal samples for infrared spectroscopy test. The sample and KBr were first mixed thoroughly at a mass ratio of 1:200, then 200 mg of the mixture was made into an infrared tablet under a pressure of 10-12 MPa, and finally the tablet was dried in a thermostat at 50°C for at least 48 hours to ready for testing. The test wavenumber range of Fourier transform infrared spectrometer is 4000~400cm -1 ...

Embodiment 3

[0183] The dry base industrial analysis and elemental analysis data of a low-rank bituminous coal sample are shown in Table 7.

[0184] Dry base industrial analysis and elemental analysis data of table 7 embodiment 3 coal sample

[0185]

[0186] a Calculated by subtraction

[0187] According to the specific operation steps (1)~(7) described before the present invention, in conjunction with the specific situation of this coal sample, complete the infrared structure parameter analysis of this coal sample according to the following methods:

[0188] (1) KBr pellet method was used to prepare coal samples for infrared spectroscopy test. The sample and KBr were first mixed thoroughly at a mass ratio of 1:200, then 200 mg of the mixture was made into an infrared tablet under a pressure of 10-12 MPa, and finally the tablet was dried in a thermostat at 50°C for at least 48 hours to ready for testing. The test wavenumber range of Fourier transform infrared spectrometer is 4000~4...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563
CPCG01N21/3563
Inventor 赵岩邵春岩侯海盟宋民航陈刚曾乐刘舒孔德勇李宝磊祁国恕张广鑫裴江涛蒋帅
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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