Sintesis Komposit Silika-Karbon Sebagai Katalis Asam Padat

Pareira, Valentino Pratama Reko and Lumadi, Prasetiyo (2017) Sintesis Komposit Silika-Karbon Sebagai Katalis Asam Padat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mempelajari pengaruh konsentrasi PEG terhadap karakteristik komposit silika-karbon sebagai katalis asam serta pengaruh lama sulfonasi terhadap katalis asam yang dihasilkan. Prosedur sintesis meliputi tahapan – tahapan berikut : (a) pembuatan silika gel, (b) impregnasi pori silika dengan karbon, (c) karbonisasi, (d) sulfonasi, dan (e) karakterisasi produk yang dihasilkan. Pembuatan silika gel dengan menggunakan PEG sebagai sumber karbon dibuat dengan menambahkan larutan PEG kedalam HCl 1 M yang kemudian dicampurkan kedalam waterglass. Template dihilangkan dengan kalsinasi pada suhu 550ºC selama 5 jam. Sulfonasi dilakukan dengan mencampurkan komposit silika-karbon dengan larutan H2SO4 pekat 98% dan dipanaskan pada suhu 1500C dengan variabel waktu. Sampel dikarakterisasi dengan Adsorbsi/Desorbsi Nitrogen, Scanning Elektron Microscophy (SEM) dan Energy Dispersive X-Ray Analysis (EDAX), Spektrofotometri FTIR (Fourier Transform Infra Red), uji kapasitas ion, serta uji reaksi esterifikasi. Berdasarkan hasil penelitian, didapatkan surface area terbaik tercapai pada template PEG 3 gram yaitu sebesar 287,109 m2/g sedangkan. Nilai surface area berbanding lurus dengan nilai kapasitas ion dimana nilai kapasitas ion terbesar untuk variabel PEG 3 gram adalah 6,31 meq/gr. Yield hasil reaksi terbesar didapat pada variabel PEG 2 gram waktu sulfonasi 10 jam sebesar 31,01%. ========================================================= This study was purposed to study the effect of PEG concentration, and sulfonation process of the characteristics of carbon-silica composite produced for acid catalyst. The synthesis procedure involved the following steps : (a) synthesis of silica gel, (b) impregnation of the silica pores with a carbon precursor, (c) carbonization, (d) sulfonation, and (e) characterization of the carbon-silica composite. Silica gel using PEG as the carbon source was prepared by adding PEG solution into HCl 1 M which is mixed with waterglass solution. Template was removed by calcination at 550ºC for 5 hours. Sulfonation by mixing silica - carbon composite with 98% H2SO4 and heated at temperature 1500 C with variable of time. Samples were characterized by N2 adsorption/desorption, Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDAX), Spectra FTIR (Fourier Transform Infra-Red), Ionic Capacity Experiment, and Esterification Reaction Experiment. Based on the results, the greatest surface area reached at PEG 3 grams which was 287,109 m2/gram. The value of surface area was linier with the value of ion capacity where the greatest ion capacity reached at PEG 3 grams which was 6,31 meq/gram. The greatest yield product of methyl acetate reaction reached at PEG 2 g with sulfonation time 10 hours produced yield 31.01%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: komposit silika-karbon, katalis asam,silica-carbon composite, acid catalyst, PEG
Subjects: Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions: Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis
Depositing User: Prasetiyo Lumadi
Date Deposited: 28 Sep 2017 08:14
Last Modified: 06 Mar 2019 03:49
URI: http://repository.its.ac.id/id/eprint/44297

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