Lignite Molecular Structure Model for Wetting Mechanism
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Solution Overview
Problem
Current research on lignite's molecular structure lacks comprehensive analysis of wetting dynamics from a microscopic perspective, failing to effectively explain the wetting mechanism of coal, and resulting in similar research conclusions due to similar structure models.
Innovation Solution
A method for constructing and optimizing a molecular structure model of lignite by analyzing elemental composition, aromatic and aliphatic hydrocarbons, oxygen-containing functional groups, and carbon structural parameters, using infrared spectroscopy and nuclear magnetic resonance techniques to determine the composition and structural features, and then designing a molecular structure model that accurately represents the lignite's real structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional structure models are used for lignite research, then research process is simple, but research conclusions are similar and cannot explain wetting mechanism
Solution Approach 1:
The lignite molecular structure is segmented into distinct functional components including aromatic clusters, aliphatic chains, and oxygen-containing functional groups. Each component is characterized separately through specific analytical methods (13C-NMR, FTIR, elemental analysis) and then integrated to form a comprehensive molecular structure model, enabling precise characterization of wetting-active sites
Solution Approach 2:
The invention transforms qualitative structural descriptions into quantitative parameters including aromatic cluster sizes (5-10 rings), aliphatic chain lengths (C1-C20), and functional group densities (0.5-2.0 groups per aromatic ring). These quantified parameters enable accurate prediction of wetting behavior and differentiation from traditional qualitative models
2Loss of information
If comprehensive molecular structure analysis is performed, then wetting mechanism can be explained, but analysis time and cost increase
Solution Approach 1:
The invention performs preliminary characterization of lignite molecular structure through standardized analytical procedures (elemental analysis, 13C-NMR, FTIR) to establish baseline structural parameters including aromaticity (0.6-0.8), oxygen content (15-30%), and functional group distribution. These pre-established parameters serve as input for wetting mechanism analysis, avoiding repeated comprehensive analysis
Solution Approach 2:
The invention creates a representative molecular structure model that copies the essential features of lignite's complex macromolecular structure. The model includes replicated aromatic clusters with attached aliphatic chains and functional groups, capturing wetting-relevant structural characteristics without requiring analysis of the entire macromolecular network
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method provides a detailed molecular structure model that elucidates the wetting mechanism of coal, supporting the development of wet dust suppression agents and improving coal mine dust control technology by simulating post-molecular dynamics behaviors.
Implementation Method 1
Conducting infrared spectroscopic analysis to the lignite experimental sample to obtain the contents of aromatic hydrocarbon, aliphatic hydrocarbon and various oxygen-containing functional groups
Implementation Method 2
Testing the lignite experimental sample by a nuclear magnetic resonance spectrometer through Cross Polarization Magic Angle Spinning (CPMAS) and Total Suppression of Sidebands (TOSS) to obtain the structural parameters
Data Source
AI summary
The present invention discloses a method for constructing and optimizing a molecular structure model of lignite, comprising: collecting and processing a lignite sample, analyzing a lignite experimental sample, calculating the number of carbon atoms in lignite and the number of carbon atoms in other parameters, obtaining the sizes of aromatic clusters, and determining the composition features and number of aromatic structural units in lignite; calculating the total number of carbon atoms and the number of aliphatic carbon atoms in lignite; obtaining the categories and number of oxygen-containing functional groups in lignite based on the contents of aromatic hydrocarbon, aliphatic hydrocarbon and various oxygen-containing functional groups, and designing the structural forms of nitrogen and sulfur; constructing a molecular structure model of lignite.