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IR Spectrometers01:25

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Process Analytical Technology-Integrated FT-IR and Raman Spectroscopies for Efficient Reactive Liquid-Liquid

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Summary
This summary is machine-generated.

This study introduces smart control using process analytical technologies (PATs) for efficient lithium recycling. Integrating spectroscopy with chemometric models reduces chemical costs by 15% and global warming potential by 20%.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Lithium is a strategic metal crucial for electrification and battery technology.
  • European Union mandates 25% of lithium consumption from recycling by a specific year.
  • Current lithium recycling processes require enhanced efficiency for economic and ecological viability.

Purpose of the Study:

  • To develop and exemplify a framework for integrating in-line spectroscopy systems with chemometric models as a process analytical technology (PAT) approach.
  • To enable smart control for reactive liquid-liquid extraction in lithium purification.
  • To improve the economic and environmental performance of lithium recycling.

Main Methods:

  • Utilized a synergistic solvent with a β-diketone for reactive liquid-liquid extraction.
  • Employed FT-IR and Raman spectroscopies for in-line monitoring.
  • Developed partial least-squares regression (PLSR) models with R² ≥ 0.95 for continuous process application.

Main Results:

  • Successfully measured concentrations of extractants, saponification degree, and metal-ion complexes in the organic phase.
  • Achieved high accuracy in spectroscopic measurements with PLSR models.
  • Estimated a 15% reduction in chemical costs and a 20% decrease in global warming potential (GWP).

Conclusions:

  • The integrated PAT framework offers a viable method for smart control in lithium recycling.
  • The proposed approach leads to significant economic benefits and reduced environmental impact.
  • A return on investment of less than 0.4 years is projected for a typical lithium purification plant.