CHEMICAL MODIFICATION ON KATI FORMATION SHALES IN ENHANCING CO2 ADSORPTION FOR CARBON SEQUESTRATION WITH NEURAL NETWORK APPROACH

This study aims to investigate the adsorption properties of low-TOC Permian shales of Malaysia (Kati Formation, Seri Iskandar, Perak, Malaysia) and the effects of chemical modification to increase the selectivity and capacity of adsorption at reservoir temperature and pressure. The physicochemical characteristic of the rock is determined using FTIR, TOC, FESEM, SAP-BET, TPD, XRD and XRF on four samples from same shale formation. From the data, the total organic carbon is in between 1.0 – 2.1 wt%, where the x-ray diffraction shows the sample consists of 35 - 85% clay minerals and 15 - 65% silica. The FTIR spectra proves addition and removal several functional groups, mostly in OH- groups, C=C groups and C-H groups. The treatment is effective in addition in mostly unsaturated bonds and removal of aromatic bonds which facilitates potential sorption sites. FESEM morphology analysis shown the pores and kaolinite surfaces to be porous and able to accommodate adsorption of CO2. With BET characterization, the average surface area on the samples that were tested ranges from 8.87 – 16.90 m2/g and their average pore size range from 17.71 – 26.41 nm, and N2 adsorption shows that a type-III isotherm, and type H3 hysteresis loop.