Open AccessSurface modification of rubber seed shell activated carbon with malic acid for high CO2 adsorption
Author(s) -
Azry Borhan,
Suzana Yusup,
Yong Mun
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/460/1/012044
Subject(s) - malic acid , adsorption , activated carbon , natural rubber , fourier transform infrared spectroscopy , porosity , carbon fibers , thermal stability , materials science , chemical engineering , carbon dioxide , chemistry , specific surface area , volume (thermodynamics) , nuclear chemistry , surface modification , organic chemistry , citric acid , composite material , catalysis , physics , quantum mechanics , composite number , engineering
Carbon dioxide (CO 2 ) has been stated as one of major contributor to climate change and affects marine ecosystems. Among other CO 2 capturing technology, adsorption is widely used due to its numerous advantages. Rubber seed shell (RSS), an agriculture waste from rubber plantation was used as precursor for preparing activated carbon (AC) by chemical activation using Malic acid as activating agent for CO 2 adsorption. In this research, the AC was characterized and analysed by SEM, Micrometric ASAP 2020, TGA and FTIR instruments. The optimum condition was found at activation temperature of 600 °C, sample A. Results from specific surface and porosity analyzer shows the AC total pore volume, specific surface area and diameter were 0.2635 cm 3 /g, 480.5692 m 2 /g and 2.1937 nm, respectively. The CO 2 adsorption studies showed the CO 2 uptake for the AC was 2.26 mmol/gwhich is better most agricultural wastes’ and commercial AC. It was found that malic acid helps to prolong the thermal stability of AC. The presence of a new FTIR peak in samples indicated N-H stretching and C=N stretching might due to remaining malic acid on the surface which increased the CO 2 affinity and was an attractive source for CO 2 adsorption applications.