Aktivitas Katalitik Oksida Perovskit La0,7Sr0,3Co1−yFeyO3−δ (y = 0,7-0,9) Dalam Reaksi Oksidasi Parsial Metana

Sholichah, Nikmatin (2016) Aktivitas Katalitik Oksida Perovskit La0,7Sr0,3Co1−yFeyO3−δ (y = 0,7-0,9) Dalam Reaksi Oksidasi Parsial Metana. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Oksida perovskit merupakan jenis katalis yang mempunyai sifat mobilitas oksigen, yaitu oksigen kisi dapat meninggalkan struktur tanpa terjadi perubahan struktur. Sifat kelebihan tersebut dimanfaatkan sebagai katalis dalam reaksi oksidasi parsial metana yang menghasilkan syngas. Sintesis katalis oksida perovskit La0,7Sr0,3Co1−yFeyO3−δ dengan nilai y = 0,7; 0,8 dan 0,9 telah berhasil dilakukan melalui metode solid state. Difraktogram sinar-X menunjukkan telah terbentuk fasa perovskit. Substitusi logam Fe menyebabkan pergeseran nilai 2θ yang lebih rendah. Uji aktivitas katalitik dilakukan dengan fixed-bed reactor. Hasil reaksi reduksi menunjukkan waktu optimum terjadi pada menit ke 30-60. Pada uji aktivitas katalitik diperoleh suhu optimum pada suhu 900 °C. Selain produk syngas, produk lain yang terbentuk adalah CO2 dan C. ====================================================================================== Perovskite oxide is a type of catalyst that has the oxygen mobility property, which means that the oxygen can leave the structure without deforming structure. This advantage is used in the partial oxidation of methane to produce syngas. Catalytic partial oxidation of methane to syngas using La0.7Sr0.3Co1−yFeyO3−δ with a value of y = 0.7, 0.8 and 0.9 was studied. The perovskite oxides were synthesized using solid-state method. X-ray diffraction (XRD) patterns of all LSCF samples showed perovskite phase has been formed. The 2θ gradually decreased as Fe increased, which means that the volume crystal of the sample increased. The catalytic activity was evaluated in a fixed-bed quartz reactor. The result showed a reduction reaction occurs at the optimum time 30-60 minutes. On the influence of temperature syngas obtained optimum results occur at 900 °C. Additionally, other products formed are CO2 and C.

Item Type: Thesis (Masters)
Uncontrolled Keywords: oksida perovskit; La0,7Sr0,3Co1−yFeyO3−δ; aktivitas katalis; reaksi oksidasi parsial metana
Subjects: Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions: Faculty of Mathematics and Science > Chemistry > 47101-(S2) Master Thesis
Depositing User: - Nikmatin Sholichah
Date Deposited: 04 May 2017 03:00
Last Modified: 27 Dec 2018 07:44
URI: http://repository.its.ac.id/id/eprint/3905

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