Hybrid Absorption–Adsorption Mechanism for CO ₂ Capture Using Mist and Coconut Fiber

ABSTRACT Greenhouse gas emissions significantly contribute to global warming, highlighting the need for effective and sustainable carbon dioxide (CO 2 ) capture technologies. This study introduces a hybrid carbon capture and storage (CCS) prototype that integrates mist‐assisted absorption with coconut fiber adsorption as a low‐cost and renewable approach. The system was evaluated in terms of CO 2 capture efficiency and energy consumption. The prototype consists of four chambers: mist generation units to enhance gas–liquid contact and coconut fiber packing to adsorb residual CO 2 . Six experimental modes were tested at two gas flow velocities (0.9 and 1.4 m/s). Real‐time CO 2 monitoring was performed using NDIR MH‐Z16 sensors validated against a reference probe meter, with data acquisition through the NI MyRIO platform. Results showed that capture efficiency increased from 14% to 19% in the baseline condition to a maximum of 65.9% in the hybrid configuration combining six mist modules and coconut fiber. Energy consumption analysis revealed that the energy consumption index (ECI) ranged from 72.95 to 79.85 kWh/kg CO 2 , with the lowest ECI obtained in the hybrid setup, although mist generation contributed significantly to power demand. Despite higher energy use compared with advanced chemical or vacuum swing adsorption systems, the prototype offers advantages in terms of simplicity, operational practicality, and use of renewable local resources. These findings demonstrate the potential of coconut fiber–based hybrid CCS systems as complementary solutions for decentralized and small‐scale applications.