CD Skripsi

Studi Komparatif Aktivasi-Karbonisasi Dan Karbonisasi-Aktivasi Limbah Agroindustri Batang Teh (Camellia Sinensis) Sebagai Sumber Karbon Aktif Untuk Adsorpsi Gas Karbon Dioksida

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The agro-industrial waste from tea stems can be utilized as a source of activated carbon, as it contains 43.45% carbon bound in organic compounds such as cellulose, hemicellulose, and lignin. This approach can help reduce waste and mitigate negative environmental impacts. The cellulose in tea stems is converted through carbonization and activation into a porous carbon structure, which is effective in adsorbing carbon dioxide (CO₂). This study compares two activated carbon synthesis methods: activation-carbonization and carbonization-activation. Carbonization was carried out in a fixed-bed pyrolysis reactor at temperatures of 250°C, 350°C, and 450°C, maintained for 5 hours. Chemical activation was applied using a 60% w/v KOH activator, with varying ratios of activator volume (Va) to precursor weight (Wp) of tea stems at 0.5:1, 1:1, and 2:1 (v/w) for 3 hours at 80°C. The highest CO₂ adsorption capacity of 1.9500 mmol g⁻¹ was observed in the activated carbon A1-450 0.5 (activation-carbonization at 450°C with a 0.5 v/w ratio), and 0.6451 mmol g⁻¹ in K1-250 0.5 (carbonization-activation at 250°C with a 0.5 v/w ratio). Both activated carbons were tested to determine their surface characteristics through several analyses, including SEM-EDX, FTIR, XRD, and BET methods. BET measurements showed a specific surface area and pore diameter of 679.4 m² g⁻¹ and 10.76 nm for A1-450 0.5, 86.6 m² g⁻¹ and 2.61 nm for K1-250 0.5. XRD analysis detected a graphite-like carbon structure with broad peaks at 2θ 22° (002) and 44° (100) for A1-450 0.5, while the peaks were narrower for K1-250 0.5. The crystal sizes were 22.06 nm for A1-450 0.5 and 31.89 nm for K1-250 0.5. FTIR analysis detected O-H stretching, C=C stretching, and C-O stretching groups in both activated carbons, while C-H stretching groups were absent in A1-450 0.5. SEM-EDX revealed a heterogeneous and irregular surface morphology for both activated carbons. The carbon (C), oxygen (O), and potassium (K) contents in the activated carbon samples were 78.23%, 10.11%, and 9.93% for A1-450 0.5, and 63.50%, 25.19%, and 10.25% for K1-250 0.5, respectively. Proximate analysis, conducted according to ASTM D5832 methods, including moisture, ash, volatile matter, and fixed carbon content, showed results that met the SNI 06-3730-1995 standard.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003134853

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003134853

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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