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Preparasi dan Karakterisasi Katalis CoMo/H-Zeolit Y Musta, Rustam
Jurnal Fisika FLUX Vol 7, No 2 (2010): Jurnal Fisika Flux Edisi Agustus 2010
Publisher : Lambung Mangkurat University Press

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Abstract

Preparation and characterization of catalyst CoMo/H-zeolite Y hasbeen done. Catalyst was prepared from NH4Y-zeolite then heated 115oC for 1 hto eliminate water then calcined at 550oC for 2 h to evaporate ammonia,produced HY-zeolite (HYZ) sample. Impregnation of CoMo metals on the HYZsample was done by co-impregnation method, where the HYZ (10 g) was mixedwith (NH4)6MO7O24.4H2O in 24 mL aquabidest and 3 mL of ammonia thenstirred of 60oC for 2 h. This mixture was then mixed with Co(NO3)2.6H2O in 24mL aquabidest and 3 mL of ammonia then stirred of 60oC for 2 h. The resultingsample was filtered and dried. The dried sample was then calcined under N2stream at temperature of 550oC for 2 h, followed by oxidized with O2 thenreduced with H2 stream at temperature 400oC for 2 h, respectively producedCoMo/HY catalyst. Characterization of the catalyst included analysis of NH3groups was done with by infra red spectrofotometry (IR), the crystallinity with Xraydiffraction (XRD) and the acidity was calculated with NH3 absorption bygravimetry method, metal content on the catalyst was determined by atomicabsorption spectroscopy (AAS). FTIR result of CoMo/HY catalyst showed thatdisappeared ammonia was after heating. The XRD date indicated the increase ofcatalyst crystallinity as the following: NH4Y< died NH4Y < HY< CoMo/HY.CoMo/HY catalyst has average acidity = 6,87 mmol/g where as the HY hasaverage acidity = 7,66 mmol/g. The metal content in the HY was 8023 and 7681ppm, for Co and Mo respectively.
HIDRODESULFURISASI TIOFEN MENGGUNAKAN KATALIS CoMo/H-ZEOLIT Y Musta, Rustam
Jurnal Fisika FLUX Vol 8, No 1 (2011): Jurnal Fisika Flux Edisi Februari 2011
Publisher : Lambung Mangkurat University Press

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Telah dilakukan penelitian terhadap reaksi hidrodesulfurisasi (HDS) tiofenmenggunakan katalis CoMo/H-zeolit Y. Proses hidrodesulfurisasi (HDS) tiofendilakukan dalam reaktor sistem batch dengan variasi temperatur 200, 250, 300, 350,400 oC dan variasi laju alir gas pembawa (H2) 40, 55, 70, 85, 100 mL/menit. Produkcair dianalisis dengan gas chromatography mass spectrometry (GC-MS). Konversiproduk gas dihitung berdasarkan persentase berat produk gas terhadap umpan. Hasilanalisis GCMS produk hasil reaksi hidrosulfurisasi tiofen menunjukkan adanya 1puncak utama tiofen pada waktu retensi 3,764 menit. Konversi gas maksimumtercapai pada suhu 350oC sebesar 82,07% (b/b) dengan konstanta laju reaksi (k)sebesar 49,56 menit-1.
Minyak Biji Nyamplung (Calophyllum inophyllum) Dengan Etanol Rezki, Rezki; Musta, Rustam; Haetami, Aceng
Indo. J. Chem. Res. Vol 4 No 2 (2017): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

A study has been conducted on the transesterification of Calophyllum innophyllum seed oil with ethanol. The purpose of this research is to determine the comparison of concentration of phosphoric acid used to remove the gum on the oil, ester content is produced in the process of transesterification with ethanol, the ester yield obtained after the final stage of the transesterification process, the viscosity of the biodiesel produced, moisture content of biodiesel is produced, and density of biodiesel was produced. This research is taken based on consideration production biodiesel by direct transesterification process. Based on research result of good phosphoric acid concentration used to remove oil gum is 85%, volume of biodiesel produced at transesterification equal to 150 mL with yield 80,89%, biodiesel quality parameter measured that viscosity = 0,05 mm2 / s not fulfill Indonesian National Standart (INS), moisture content = 0.045 meets the INS and the density = 0.881 g / cm3 meets the INS
Biodiesel Hasil Transesterifikasi Minyak Biji Nyamplung (Calophyllum inophyllum) Dengan Metanol Musta, Rustam; Haetami, Aceng; Salmawati, Mimi
Indo. J. Chem. Res. Vol 4 No 2 (2017): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Study of the transesterification of Calophyllum innophyllum seed oil from Kendari with methanol has been conducted. The purpose of the research to determine of the yield of ester produced in transesterification process with methanol, the viscosity of biodiesel produced, moisture content of biodiesel produced, density of biodiesel produced. The methods used in this study are sample preparation, transesterification process, biodiesel quality parameter test consisting of viscosity, moisture content and density. The results showed that good concentration of phosphoric acid was used to remove the gum is 85%, the yield of ester produced in the process of transesterification with methanol is 111,647%, parameter of biodiesel quality measured that viscosity = 0,315 mm2/ s not fulfill Indonesian National Standart (INS), water content is 0.02 meets the INS and the density = 0.8725 g / cm3 meets the INS standard
Studi Kinetika Efektifitas Minyak Daun Cengkeh (Syzigium aromaticum) Sebagai Antifungi Candida albicans Musta, Rustam; Nurliana, Laily
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Kinetic studies effectiveness clove leaf (Syzigium aromaticum) oil as antifungal Candida albicans have been done. The study have purpose to determine the reaction order, reaction constants (k) and relationship the concentration of clove leaf (Syzigium aromaticum) oil every time (At) with the initial concentration of of clove (Syzigium aromaticum) oil (Ao) and time (t) and equipped determination of the minimum concentration of clove leaf (Syzigium aromaticum)oil effective anti-fungus Candida albicans. The results shows the anti-fungal activity clove leaf (Syzigium aromaticum) oil on Candida albicans for each variation of the concentration 100%, 75%, 50% and 25% are 14.2 mm, 12.2 mm, 10.8 mm and 10.4 mm respectively. Reaction order as antifungal of the clove leaf (Syzigium aromaticum) oil on Candida albicans is 0.2112 with k = 5.0594. The minimum concentration of clove leaf (Syzigium aromaticum) oil as anti-fungal Candida albicans is 17.86%.
Studi Kinetika Antibakteri dari Hasil Pirolisis Cangkang Biji Jambu Mete terhadap Staphylococcus aureus Nurliana, Laily; Musta, Rustam
Indo. J. Chem. Res. Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

Research on kinetics antibacterial from pyrolysis product of cashew nut shell againts Staphylococcus aureus have been carried out. Cashew nuts are prepared by separating the shell and seeds for pyrolysis. The results of S. aureus antibacterial activity test results pyrolysis pyrolysis products shell cashew nut showed inhibition is different for each variation of the concentration of 12.5%, 25%, 50%, 75% and 100% with inhibition of successive 0.87; 0.97; 1.38; 1.47 and 1.61 (cm). Based on these results it can be said that the result of the pyrolysis of cashew nut shells provide a response inhibition that were at concentrations of 12.5 and 25%. While the concentration of 50%, 75%, and 100% response inhibitory power is included in the strong category on the growth of S. aureus. Order the reaction of the antibacterial activity of S. aureus from the pyrolysis products obtained cashew nut shell 0,3 with activity rate constant of 0.38. The concentration of pyrolysis products of pyrolysis results cashew nut shell the minimum recommended for use as an antibacterial S.aureus.
Waktu Optimum Hidrolisis Pati Limbah Hasil Olahan Ubi Kayu (Manihot esculenta Crantz var. Lahumbu) Menjadi Gula Cair Menggunakan Enzim α-Amilase Dan Glukoamilase Ardiansyah, Ardiansyah; Nurlansi, Nurlansi; Musta, Rustam
Indo. J. Chem. Res. Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

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Abstract

This study aims to determine optimum time of action of the enzyme α-amylase and glucoamylase needed in hydrolyze of starch from waste processed cassava (Manihot esculenta Crantz var. Lahumbu). This research was conducted through three main stages, namely the gelatinization, liquefaction and saccharification. The method was used method are liquefaction and&nbsp; saccharification. The variation time of the stage liquefaction: 12; 24; 36; 48; 60; and 72 minutes and the saccharification stage are: 9; 18; 27; 36; 45; 54; and 63 hours. The results showed that the optimum time required for stage liquefaction using α-amylase enzyme is 48 minutes on the condition of a temperature of 80 oC with a value of 0.09% amylose levels were measured using UV-Vis spectrophotometer. The optimum time required for saccharification step using a glucoamylase which is 54 hours on the conditions of a temperature of 50oC with the amount of reducing sugar concentration of 9.186 g/L as measured using a UV-Vis spectrophotometer.