Amine Functionalized Carbon-based Soybean Curd Residues (SCR) as Potential Adsorbent for Carbon Dioxide Adsorption

Currently, carbon dioxide (CO 2 ) capture can preserve environmental quality by using carbon-based adsorbent. In this research, Polyethylenehexamine (PEHA) functionalized carbon-based soybean curd residues (carbonized SCR-PEHA) was prepared for CO 2 adsorption. Analysis of functional groups of the prepared adsorbent using Fourier Transform Infrared Spectroscopy (FTIR), confirmed the functionalization of PEHA on the carbonized SCR. CO 2 uptake of the carbonized SCR-PEHA was compared with the bare SCR using Thermogravimetric Analyzer (TGA) analysis. TGA results revealed that the adsorption capacity of CO 2 for carbonized SCR-PEHA and bare SCR are 8.816 mg/g and 3.027 mg/g respectively. It was observed that functionalization of the PEHA on the surface of carbonized SCR had improved the adsorption capacity of CO 2 by 2.92 times as compared to bare SCR. The phenomenon can be explained from the interaction of the CO 2 with the available amine sites provided for the carbonized SCR-PEHA which significantly improved the CO 2 adsorption. Hence, the carbonized SCR-PEHA demonstrate potential adsorbent for CO 2 .