Peningkatan Kapasitas Adsorpsi CO2 pada Karbon Aktif dari Tandan Kosong Kelapa Sawit dengan Modifikasi Nitrogen

Fajryati, Yuliyana (2019) Peningkatan Kapasitas Adsorpsi CO2 pada Karbon Aktif dari Tandan Kosong Kelapa Sawit dengan Modifikasi Nitrogen. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan adsorpsi CO₂ berhasil dicapai dengan kapasitas sebesar 14,9233–20,123% berat pada suhu 30°C dan tekanan 1 bar. Peningkatan kapasitas adsorpsi CO₂ dipengaruhi oleh bertambahnya luas permukaan dan karakteristik pori material. Luas permukaan dan volume pori meningkat dari 699,143 menjadi 1309,468 m²/g dan dari 0,5209 menjadi 0,8381 cm³/g. Kinetika adsorpsi CO₂ mengikuti model reaksi orde dua semu dengan korelasi R² yang tinggi. Kapasitas adsorpsi berbanding lurus dengan jumlah sisi aktif, sehingga karbon aktif termodifikasi nitrogen memberikan kontribusi yang baik terhadap adsorpsi CO₂. Karbon aktif termodifikasi nitrogen disintesis menggunakan *tube furnace* pada suhu 800°C selama 2 jam dengan laju pemanasan 10°C/menit. Material hasil sintesis dikarakterisasi menggunakan XRD, FTIR, SEM, dan analisis adsorpsi-desorpsi N₂. Hasil XRD menunjukkan bahwa material memiliki puncak amorf. Citra SEM memperlihatkan bahwa karbon aktif termodifikasi nitrogen memiliki struktur pori yang teratur. Spektra FTIR menunjukkan adanya perubahan yang signifikan pada gugus fungsi material karbon berpori. Hasil analisis adsorpsi-desorpsi N₂ menunjukkan bahwa karbon aktif termodifikasi nitrogen memiliki kapasitas adsorpsi tertinggi sebesar 20,123% berat.
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Enhanced CO₂ adsorption was successfully achieved with an adsorption capacity ranging from 14.9233 to 20.123 wt.% at 30°C and a pressure of 1 bar. The improvement in CO₂ adsorption capacity was attributed to the increased specific surface area and favorable pore characteristics of the material. The specific surface area and pore volume increased from 699.143 to 1309.468 m²/g and from 0.5209 to 0.8381 cm³/g, respectively. The CO₂ adsorption kinetics followed a pseudo-second-order model with a high correlation coefficient (R²). The adsorption capacity was proportional to the number of active sites, indicating that nitrogen-modified activated carbon contributed significantly to CO₂ adsorption. Nitrogen-modified activated carbon was synthesized using a tube furnace at 800°C for 2 hours with a heating rate of 10°C/min. The synthesized material was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and N₂ adsorption-desorption analysis. XRD results indicated that the synthesized material exhibited an amorphous structure. SEM observations revealed a well-developed and regular pore structure in the nitrogen-modified activated carbon. FTIR spectra showed significant changes in the functional groups of the porous carbon material. N₂ adsorption-desorption analysis demonstrated that the nitrogen-modified activated carbon achieved the highest adsorption capacity of 20.123 wt.%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Karbon dioksida, Modifikasi Nitrogen, Karbon Aktif
Subjects:	Q Science > QD Chemistry > QD502 Chemical kinetics Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Divisions:	Faculty of Natural Science > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Fajryati Yuliyana
Date Deposited:	20 Jul 2026 04:48
Last Modified:	20 Jul 2026 04:48
URI:	http://repository.its.ac.id/id/eprint/67181

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