PEMBUATAN DAN KARAKTERISASI NANOKATALIS Ni(1-x)CuxFe2O4 SERTA UJI AKTIVITAS PADA KONVERSI (CO2+ H2)

Rodhiansyah Djayasinga, 1327011015 (2015) PEMBUATAN DAN KARAKTERISASI NANOKATALIS Ni(1-x)CuxFe2O4 SERTA UJI AKTIVITAS PADA KONVERSI (CO2+ H2). Masters thesis, Universitas Lampung.

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Abstrak

Air pollution is a mingling of harmful elements into the atmosphere which can cause the environmental damage, the disturbances in human health, and the climate change. The climate change due to the global warming has been increasingly concerned to our life on earth, it is caused by the increase in the concentrations of greenhouse gases (GHG) that were formed in the layers of the earth's atmosphere. One of the efforts to tackle the greenhouse gases is through the conversion, particularly the conversion of CO2 gas which has the largest composition in the greenhouse gases. One of the conversion method that has been developed was the catalytic hydrogenation to produce a variety of products that are more useful among them is alcohol. This conversion method performed with the aid of a catalyst. In this research, preparation of Ni(1-x)CuxFe2O4 (where x = 0.1 to 0.3) nanocatalysts with a freezedry sol-gel method was performed, aand was followed by the catalytic activity test of the catalyst in the conversion reaction of (CO2 + H2) into alcohol, and other organic compounds at temperature of 200°C - 400°C. The result of characterization of the catalyst indicated that the formation of crystalline phases Ni(1-x)CuxFe2O4 (where x = 0.1 to 0.3) was 80- 98%. The results of size analysis using Debye-Scherrer method and measurement using TEM showed that the size of the catalyst was in the range of 10.61 to 24.84 nm. The analysis results of particle size distributions using the PSA indicated that the nanometer-scale catalyst was obtained in the range of 12.5 to 19.3%. The result of activity of the Ni(1-x) CuxFe2O4 catalyst in the conversion of CO2/H2 showed that the Ni(1-x) CuxFe2O4 catalyst was active, however it was not selective for the formation of ethanol. The analysis by chromatography gas showed that the Ni0,8Cu0,2Fe2O4 catalyst with the calcination temperature of 600°C and reaction temperature of 200°C was the most active in the conversion of CO2 / H2 to produce ethanol, i.e. 1.62%. Keywords:Debye-Scherrer method, freezedry sol-gel method, nanocatalyst, pectin Pencemaran udara adalah tercampurnya unsur-unsur berbahaya kedalam atmosfir yang dapat mengakibatkan terjadinya kerusakan lingkungan, gangguan pada kesehatan manusia,dan perubahan iklim.Perubahan iklim sebagai akibat pemanasan global semakin mengkhawatirkan kehidupan makhluk hidup di bumi, hal ini disebabkan oleh meningkatnya konsentrasi gas rumah kaca (GRK) yang terbentuk di lapisan atmosfer bumi. Salah satu upaya untuk menanggulangi gas rumah kaca adalah melalui konversi, khususnya konversi gas CO2 yang memiliki komposisi terbesar dalam gas rumah kaca. Salah satu metode konversi tersebut yang telah banyak dikembangkan adalah hidrogenasi katalitik untuk menghasilkan berbagai produk yang lebih bermanfaat diantaranya alkohol. Metode konversi ini dilakukan dengan bantuan katalis. Dalam penelitian ini dilakukan preparasi nanokatalis Ni(1-x)CuxFe2O4 (dimana x = 0,1 – 0,3) dengan metode sol-gel Freezedry, serta uji aktivitas katalitiknya terhadap reaksi konversi (CO2 + H2) menjadi senyawa alkohol, dan senyawa-senyawa organik lainnya pada suhu 200°C - 400°C. Hasil karakterisasi katalis menunjukan terbentuknya fasa kristalin Ni(1-x)CuxFe2O4 (dimana x = 0,1 - 0,3) sebesar 80- 98 %.Hasil analisis ukuran mengunakan metode Debye-Scherrer dan pengukuran menggunakan TEM menunjukan ukuran katalis pada rentang 10,61 – 24,84 nm.Hasil analisis ukuran distribusi partikel menggunakan PSA mengasilkan katalis berskala nanometer pada rentang 12,5-19,3 %. Hasil uji aktivitas katalis Ni(1-x)CuxFe2O4 terhadap konversi CO2/H2 menunjukkan bahwa katalis Ni(1-x)CuxFe2O4 aktif namun tidak selektif terhadap pembentukan etanol. Analisis menggunakan Kromatografi Gas menunjukkan bahwa katalisNi0,8Cu0,2Fe2O4 pada suhu kalsinasi 600°C dengan suhu reaksi 200°Cpaling aktif terhadap konversi CO2/H2 menghasilkan etanol yaitu 1,62 %. Kata kunci : Metode Sol Gel-freezedry, Metode Debye-Scherrer, Nanokatalis, Pektin

Tipe Karya Ilmiah: Tesis (Masters)
Subyek: Q Science (General) > QD Chemistry
Program Studi: Fakultas MIPA > Prodi Magister Ilmu Kimia
Depositing User: 669796 . Digilib
Date Deposited: 14 Jul 2015 04:40
Last Modified: 09 Sep 2015 04:33
URI: http://digilib.unila.ac.id/id/eprint/11174

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