Open AccessPreparation of magnesium oxide confined in activated carbon synthesized from palm kernel shell and its application for hydrogen sulfide removal
Author(s) -
Devi Abriyani,
Teguh Ariyanto,
Imam Prasetyo
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/963/1/012031
Subject(s) - magnesium , materials science , scanning electron microscope , oxide , hydrogen sulfide , calcination , carbon fibers , porosity , chemical engineering , hydrogen , hydrogen storage , sulfide , activated carbon , inorganic chemistry , nuclear chemistry , sulfur , metallurgy , adsorption , composite material , chemistry , composite number , catalysis , biochemistry , organic chemistry , alloy , engineering
In this study, magnesium oxide (MgO) confined in porous carbon was synthesized and the efficacy of this material was analyzed for hydrogen sulfide removal. The palm kernel shell was carbonated to obtain the porous carbon material (labelled as AC-TKS). The confinement of magnesium oxide was carried out by the incipient wetness impregnation process of a metal oxide precursor followed by calcination. The MgO content in porous carbon was optimized to maintain a 5 wt. % total content of oxide (MgO-5%/AC-TKS). Materials were characterized using N 2 -sorption analysis, X-ray diffraction (XRD) and scanning electron microscopy-EDX (SEM-EDX). AC-TKS has a high specific surface area (SSA) of 708 m 2 /g. Meanwhile, the specific surface area decreased by up to 50% (ca. 248 m 2 /g) for MgO-5%/AC-TKS caused by the blocking of the MgO content. The successful confinement process was proven by X-ray diffraction analysis which revealed that MgO was formed by the appearance of MgO peaks. This is supported by the results of SEM-EDX mapping, which showed the presence of Mg and O elements on the carbon surface. The higher H 2 S removal was shown by MgO-5%/AC-TKS which could reduce H 2 S up to 98.6% and showed a better performance compared to only porous carbon.