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CHARACTERIZATION OF FTIR IN GRAPHITE FROM PALM OIL
WASTE WITH FERRIC CHLORIDE CATALYST
Rinette Visca
*
, Mubarokah Nuriaini Dewi, Alvira Liviani, Bima Dwi Satriawan
Faculty of Industrial Technology, Jayabaya University, East Jakarta, DKI Jakarta, Indonesia
*
viscairsyad96@gmail.com
PAPER INFO ABSTRACT
Received: August
2022
Revised: August
2022
Approved: August
2022
Background: Indonesia has various sources of graphite in large quantities.
One of them is palm oil waste. Palm oil is a horticultural crop that acts as the
largest non-oil and gas foreign exchange contributor in Indonesia.
Aim: This study aims to synthesize graphite from oil palm trunks with a
catalyst through the pyrolysis method.
Method: This is an experimental research which eventually generated
qualitative data to be analyzed. Oil palm trunks are dried in the sun, then
crushed into powder with a grinder and sieved to 200 mesh. Graphite was
synthesized using a carbonization step at 500°C. Impregnation using 3M
ferric chloride (FeCl
3
), with a concentration variation of 10% and 30%.
Further activation at a temperature of 900°C for 3 hours.
Findings: The results synthesis of graphite powder were washed with
hydrochloric acid (HCl) and distilled water repeatedly to obtain relatively
pure graphite. Graphite characterization includes Fourier Transform Infrared
Spectroscopy (FTIR). The results of FTIR analysis showed that graphite
contains functional groups OH, CH, C–O, C≡C, and C=C.
KEYWORDS
carbonization, ferric chloride, FTIR, oil palm trunks, pyrolysis
INTRODUCTION
Indonesia has a variety of sources of graphite in large quantities. One of them is palm oil
waste. Palm oil is a horticultural plant that acts as the largest contributor to non-oil and gas
foreign exchange in Indonesia (Darmawan et al., 2021). Graphite can be categorized into two
types, namely natural graphite and synthetic graphite (Chung, 2002). Natural graphite is usually
a result of the processing of carbon compounds during metamorphosis and occurs in
sedimentary metamorphic rocks. Synthetic graphite can be processed from high processing
temperatures of amorphous carbon (Dovbeshko et al., 2002).
Palm trunks contain organic compounds such as cellulose, lignin, and hemicellulose
(Saputri & Sukmawan, 2020). Organic compounds can be used as a source of graphite with
further processing processes (Kusumattaqiin et al., 2020). Palm oil can be used as a raw
material in the manufacture of graphite because it has a carbon content (Thebora et al., 2020).
Because of the valence numbers possessed by carbon atoms, graphite can form many allotropes
(Ningrum et al., 2020). Carbon allotropes that have been known to date are graphite, diamond,
fullerite, carbon nanotubes, fullerenes, and graphene (Honorisal et al., 2020). Graphite is
difficult to dissolve in water, is not easy to burn, and has good thermal, mechanical and
electrical properties (Mahmudah & Kusumawati, 2020)
Previous studies have reported that synthetic graphite requires high-temperature
processing parameters almost in graphite synthesis. This suggests an extremely high
temperature is necessary to increase the mobility required by the carbon atom into a graphite
crystal lattice. In short, synthetic graphite is produced from the high-temperature processing of
Characterization of FTIR in Graphite from Palm Oil Waste with Ferric Chloride Catalyst
1356 Interdisciplinary Social Studies, 1(11), Aug 2022
amorphous carbon materials. There are many types of materials used as precursors to produce
synthetic graphite including coal, petroleum, and natural and synthetic organic matter
(Taufantri et al., 2016).
Wulandari et al. (2017) edict is synthesized by heating graphite powder at a temperature
of 1000ºC. Wachid et al. (2014) reported that the sample was placed on a crucible and dried at
a temperature of 110 °C then continued with an activation phase with temperatures of 400°C,
800°C, and 1000°C and a residence time of 3 -5 hours. Perdani et al. (2021) mention graphite
obtained using a time variation of 1-3 hours at a temperature of 600°C. Graphite was
characterized using FTIR indicating the presence of functional groups C≡C, C=C, OH, CH,
and CO. Therefore, this study aims to synthesize graphite from palm trunks by catalyst
through the pyrolysis method.
METHOD
Research Method
This research was experimental and ultimately produced qualitative data that could be
examined.
Tools and Materials
The main material used in this study was palm oil stem waste obtained from one of the
palm oil mills. The chemicals used include FeCl
3
, HCl, and aqueous. The tools used are
furnaces, analytical balance sheets, litmus paper, desiccators, Petri dishes, and Buchner
vacuums. The instrument used in this study was the Infrared Spectrophotometer (FT-IR
Shimadzu).
Procedure
The trunk of the palm is dried in the sun, after drying it is smoothed with a grinder and
sifted to the size of 200 mesh. Graphite synthesis uses the carbonization activation stage at a
temperature of 500°C. Carbon is neutralized with NaOH 1M and rinsed with aqueous to pH 7.
Activated carbon is dried in a 110°C oven for 24 hours and then sifted using a sieve.
Impregnation using ferrous chloride (FeCl
3
) 3M, with concentration variations at 10% and 30%
(v/v). Furthermore, graphitization at a temperature of 900 °C for 3 hours in the furnace. The
synthesis results in the form of graphite powder washed with hydrochloric acid (HCl) and
aqueous repeatedly to neutralize the pH in obtaining relatively pure graphite. Litmus paper is
used to determine the pH of graphite. Characterization of graphite using an FTIR
spectrophotometer at a wave number of 4000-400 cm
-1
.
RESULTS AND DISCUSSION
The FTIR spectrophotometer is used to analyze the functional group of graphite. The
results of the characterization of FTIR on graphite samples are shown in figures 1 and 2. From
the two samples, it was detected that all graphite samples had a C=C bond. Absorption peaks
in figure 1 were found in wave number 1514.19 cm
-1
while figure 2 was in the wave number
1512.26 cm
-1
which showed the C=C bond as a characteristic of the graphite vibration band.
From the graph, it can be seen that the smaller the size fraction, the higher the wavelength
absorbed will be. This is following the research carried out by Nandiyanto et al. (2019) and
Characterization of FTIR in Graphite from Palm Oil Waste with Ferric Chloride Catalyst
1357 Interdisciplinary Social Studies, 1(11), Aug 2022
Allaberdiev (2002) mentioned that there is an absorption of the C=C bond at the wave number
1510 -1620 cm
-1
.
Some carbon functional group absorption bands were detected at wave number 3730.40
cm
-1
indicating the absorption of the OH group; at wave number 2875.02 cm
-1
indicating the
presence of a methylene vibration group CH, and at wave number 2310.82 cm
-1
indicating the
presence of an acetylene group C≡C; at wave number 1291.40 cm
-1
indicating the presence of
a CH group, and at wave number 1144.80 cm
-1
there is a CO group.
Figure 1. Graphite FTIR spectrum with FeCl
3
10% (v/v)
Figure 2. Graphite FTIR spectrum with FeCl
3
30% (v/v)
CONCLUSION
The synthesis of graphite from palm stem waste is carried out through the carbonization
stage and the pyrolysis stage. Graphite characterization includes Fourier Transform Infrared
Spectroscopy (FTIR). The results of the FTIR analysis showed that graphite contains functional
groups OH, CH, C–O, C≡C, and C=C. However, it is expected that more researchers take
interest in analyzing this topic since the application can stretch to many other objects as well.
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