SIntesis katalis NiMCM-41 dan Ni/NiMCM-41 serta uji aplikasi untuk perengkahan minyak kelapa

IMACULADA C HENRIQUES BAPTISTA, Prof.Iip izul Falah: Dr.Suyanta M.Si

2015 | Skripsi | S1 KIMIA

Telah dilakukan sintesis material NiMCM-41 dan Ni/NiMCM-41 serta uji pemakaiannya untuk konversi minyak kelapa menjadi biofuel. Sintesis material NiMCM-41 menggunakan cetiltrimetilammonium bromida (CTAB) dan tetrametilamonium hidroksida (TMAOH) sebagai template, natrium silikat dan natrium alumina berturut-turut sebagai sumber silika dan alumina. Campuran diproses secara hidrothermal pada suhu 100 oC selama 12 jam, dicuci sampai netral kemudian dikeringkan. Template dihilangkan dengan kalsinasi pada 540 oC. Selanjutnya NiMCM-4 dibuat menjadi Ni/NiMCM-41 dengan metode impregnasi basah. Hasil sintesis dianalisis dengan Forier Transform Infrared (FTIR), X-ray Difraction (XRD), Atomic Absorption Spectrophotometer (AAS), Transmision Electron Microscope (TEM) dan adsorpsi gas nitrogen dengan metode Brunauer-Emmet-Tailor (BET), sedangkan karakterisasi terhadap produk perengkahan dilakukan dengan menggunakan Gas Liquid Chromatography � Mass Spectrometer (GC-MS). Hasil analisis menggunakan XRD dan TEM menunjukkan bahwa dalam NiMCM-41, Ni berada dalam kerangka dan membentuk pori heksagonal. Ukuran pori, diameter dan luas area material NiMCM-41>Ni/NiMCM-41. Keasaman NiMCM-41>Ni/NiMCM-41. Perengkahan minyak kelapa menggunakan katalis NiMCM-41 menghasilkan nilai konversi total 63,833% dan selektivitas terhadap fraksi bensin 43,816%, sedangkan perengkahan menggunakan katalis Ni/NiMCM-41 menghasilkan nilai konversi total dan selektivitas terhadap bensin berturut-turut 60,862% dan 30,405%.

The syntheses of material of NiMCM-41 and Ni/NiMCM-41, and their application testing for conversion of coconut oil into biofuel have been performed. The synthesis of material NiMCM-41 used cetyltrimethylammonium bromide (CTAB) and tetramethyl-ammonium hydroxide (TMAOH) as a template, sodium silicate and sodium alumina as the sources of silica and aluminium, respectively. The mixture was processed by hydrothermal methode at 100 oC for 12 hours, washed until neutral, and it was then dried. The template was eliminated from the material by calcination at 540 oC. NiMCM-41 was then modified as Ni/NiMCM-41 by impregnation method. The products were then characterized by Forier Transform Infrared (FTIR), X-ray Difraction (XRD), Atomic Absorption Spectrophotometer (AAS), Transmision Electron Microscope (TEM) and nitrogen gas adsorpition by methode of Brunauer-Emmet-Tailor (BET), while product of cracking was characterized by using Gas Liquid Chromatography � Mass Spectrometer (GC-MS). The TEM and XRD analyses results showed that in NiMCM-41, Ni was incorporated in the porous heksagonal framework. The diameter, pore size, surface area and acidity of NiMCM-41 were higher than that of Ni/NiMCM-41. Yield of the cracking of coconut oil using NiMCM-41 catalyst showed that total conversion was 63,833%, and selectivy to biogasoline was 43,816%, while using Ni/NiMCM-41, total conversion and selectivity were 60,862% and 30,405%, respectively.

Kata Kunci : NiMCM-41, Ni/NiMCM-41, cracking, biofuel, coconut oil