Calorific Value Measurement of Large-Particle Coal Using NIRS–XRF Fusion Spectroscopy and Nonlinear Residual Correction: A PLS–AE–RR Model Framework

Key Points

• The central aim is to accurately measure the calorific value of large-particle coal samples on-site, overcoming challenges of milling and matrix effects.
• Used a fusion of NIRS and XRF spectroscopy to analyze large-particle coal samples.
• Developed a PLS-AE-RR model framework to enhance measurement accuracy.
• Implemented nonlinear residual correction to address matrix effects and nonlinearities.
• Achieved improved accuracy in calorific value measurement compared to traditional methods.
• Demonstrated the successful application of the PLS-AE-RR model for large-particle coal samples.
• Validated the method's effectiveness with reduced measurement errors.