Real-time Monitoring of CO2 Capture and Syngas Production Using Integrated Sensing Systems and Waste Platinum Catalyst

For carbon capture and utilization, real-time monitoring technologies are employed in syngas production through efficient CO 2 capture and conversion, achieving a synergistic relationship between chemical process control and sensor performance.An alkaline absorption system was developed to capture CO 2 (14500-14800 ppm), which was subsequently converted into syngas using waste platinum (Pt) catalysts via microwave induction.Integrated sensing systems, including nondispersive infrared sensors and electrochemical probes, were employed to quantify CO 2 capture kinetics and evaluate process stability.Increasing the NaOH concentration from 1 to 7% extended the CO 2 breakthrough time from 138 to 1782 s.High-resolution sensors enabled the identification of ionic conductivity signatures, where the 3.6-fold difference in equivalent conductivity between OH -and CO 3 2-facilitated the predictive monitoring of solvent exhaustion.Microwave-assisted dry reforming (450 W) using 6 g of waste Pt catalyst and 0.8 g of micronsized iron powder achieved average H 2 and CO yields of 18.8 and 25.1%, respectively.The results demonstrate that integrated sensor networks are essential for managing the inherent variability of CO 2 absorption, thereby enabling an automated, sensor-driven circular economy.