Ghaffari et al. (2023): Sodium Hydroxide-Based CO2 Direct Air Capture for Soda Ash Production – Fundamentals for Process Engineering

Somayyeh Ghaffari, Maria F. Gutierrez, Andreas Seidel-Morgenstern, Heike Lorenz, Peter Schulze IN: Ind. Eng. Chem. Res. 2023, 62, 19, 7566–7579

This work introduces the principles and supplies the first key parameters for replacing the conventional ammonia-soda (Solvay) process with a new environmentally friendly and sustainable process. For this, the absorption of diluted CO₂ (0.0153–1.2 vol %) in carbonated NaOH solutions was experimentally studied in a temperature range relevant for direct air capture (DAC) in the middle Europe (5–20 °C). A dynamic process model was formulated and solved based on the literature parameters.

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