EVALUATION OF COCONUT HUSK BASED MAGNETIC SORBENT FOR DEFOAMING APPLICATION

FELICIA TERRY ANAK LO, - (2022) EVALUATION OF COCONUT HUSK BASED MAGNETIC SORBENT FOR DEFOAMING APPLICATION. [Final Year Project Report] (Unpublished)

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Abstract

The removal of undesired contaminants in activated Methyldiethanolamine (MDEA) solvent was conducted by utilizing magnetic activated carbon (MAC). In this work, MAC was synthesized from coconut husk through chemical activation and co�precipitation methods. The performance of this material as an adsorbent was evaluated based on the foaming behaviour of activated MDEA solvent after being contacted with MAC at different duration and varying amounts. Nitrogen gas was introduced into the amine solvent through a gas diffuser to create foam. Based on the results, the foam volume generated by activated MDEA solvent was identified to decrease with the increase in both MAC exposure time and amount. However, the removal efficiency of MAC decreases at 4 to 8 hours of contact time which results in greater foam volume as compared to other contact duration. The highest removal efficiency by MAC was identified to be at 1 hour contact time between MAC and activated MDEA solvent where the foam breaking time was reduced to 10-30 minutes. Meanwhile, the addition of 50% MAC into the solvent was able to further decrease the foam breaking time to 5-10 minutes. The characteristics of prepared MAC were also evaluated through Thermogravimetric Analyzer with Derivative Thermogravimetric Analyzer (TGA/DTG), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM/EDX), Fourier-Transform Infrared Spectroscopy with Potassium Bromide (FTIR-KBr) and Brunauer-Emmett-Teller (BET) Surface Area Analyzer. This study shows that the MAC synthesized from coconut husk has a good potential as an adsorbent in removing the contaminants in activated MDEA solvent to reduce the foam formation.

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