Binderless compaxtion of AC / MOF composite for carbon capture and storage

• Main Author: Ooi Jen Wai
• Published: 2023
• Subjects: carbon capture; MOF; Activated Carbon; zeolite; binderless compression

Global warming and climate change have been a major issue since the past decades. This phenomenon can be related to the increasing combustion of fossil fuels where greenhouse gasses such as carbon dioxide are constantly released into the atmosphere. One of the most cost-effective method to tackle this problem is by utilizing carbon capture and storage method with the use of solid adsorbents by adsorption method. The aim of this project is to fabricate activated carbon/MOF composite hybrid adsorbents for carbon capture and storage using binderless compression method. This project also aims to study the structural and adsorption properties of zeolite 13X, MOF-199, activated carbon and activated carbon/MOF composite. The solid adsorbents were compacted binderlessly through manual hydraulic pellet press at pressure range from 73.9 to 221.6 MPa. The crystalline structure and adsorption properties of the adsorbents were successfully characterized by X-Ray diffraction, field emission scanning electron microscopy, Fourier-transform infrared spectroscopy, nanohardness and N2 adsorption-desorption test. From the XRD results, 13X, AC and AC/MOF-199 crystallite structure were retained while MOF-199 phase formation shifted to the right after compressed. The characterization for FESEM shows that MOF-199 crystallite structure was deformed due to the compression, while 13X, AC and AC/MOF-199 composite only show slight deformation. The results of FTIR show no bonding properties for 13X, MOF-199 and AC. Nanohardness was characterized with loading range of 100-3000mN for 13X and MOF-199, while a constant load of 100mN and 300mN was used for AC and AC/MOF-199 composite. MOF-199 have the highest average reduced modulus and hardness of 2.8177 and 0.1275 GPa. N2 adsorption-desorption was done for 13X and AC. BET surface area was obtained for both 13X and AC with a surface area of 349.9 and 116.6 m2/g, while only 13X have Langmuir surface area of 373.1 m2/g.