Pore full-scale distribution representation method based on RMSE weighted fusion and spline interpolation

By combining RMSE-weighted fusion of CO2 adsorption, N2 adsorption, and mercury intrusion porosimetry with cubic spline interpolation, the problems of incomplete pore size coverage and large data fusion errors in traditional pore detection methods are solved, and accurate full-scale pore structure characterization of porous materials is achieved.

CN122306653APending Publication Date: 2026-06-30XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2026-03-25
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional pore detection techniques cannot accurately measure micropores smaller than 2 nm, mercury intrusion porosimetry has low resolution for pores smaller than 50 nm, data fusion has significant errors, and existing techniques directly superimpose data linearly, resulting in large errors in the overlapping area.

Method used

The RMSE weighted fusion and spline interpolation method was adopted, combined with CO2 adsorption, N2 adsorption and mercury porosimetry, and the full-scale pore distribution curve of 0.3nm-400μm was generated by weighted average fusion calculation and cubic spline interpolation algorithm.

Benefits of technology

It achieves full-scale pore size coverage from 0.3nm micropores to 300μm macropores, reduces system bias, improves the consistency and accuracy of data in overlapping pore size segments, and ensures the continuity and reliability of pore distribution curves.

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Abstract

This invention discloses a method for characterizing the full-scale distribution of pores based on RMSE weighted fusion and spline interpolation, relating to the field of porous material pore structure technology, including the following steps: S1, sample degassing treatment: the sample to be tested is degassed in a vacuum environment, with a degassing temperature ≤150℃, a vacuum degree ≤0.1 Pa, and a degassing time ≥6 h; S2, ultra-micropore detection: the degassed sample is placed in a constant temperature environment of 273±5 K, CO2 gas is introduced, and the adsorption isotherm is tested in the pressure range of 0-0.1 MPa. The pore size distribution data of 0.3-2 nm is calculated according to GB / T21650.3. This invention proposes a combined approach using three testing methods—CO2 adsorption, N2 adsorption, and mercury intrusion porosimetry—to achieve full-scale pore size coverage from 0.3 nm micropores to 300 μm macropores. This overcomes the limitation of single testing methods in terms of pore size range and fully reflects the true pore structure of materials. In the 2-5 nm overlapping pore size range, a weighted fusion algorithm based on RMSE is used to dynamically allocate weights according to the model error, reducing the systematic bias caused by different testing models.
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