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All Journal Department of Naval Architecture Journal of Engineering and Technological Sciences Teknologi Indonesia Makara Journal of Science Makara Journal of Technology
Mohammad Nasikin
Department of Chemical Engineering, Faculty of Engineering, University of Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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The Influence of Pt Atomic Ratio in the Activity PtNi/C Nanocatalysts for the PEMFC Rusnaeni, Nenen; Purwanto W., Widodo; Nasikin, Mohammad; Hendrajaya, Lilik
Journal of Engineering and Technological Sciences Vol 43, No 1 (2011)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.344 KB) | DOI: 10.5614/itbj.eng.sci.2011.43.1.1

Abstract

Pt-Ni/C alloy nanocatalysts synthesized by polyol method with different atomic ratio are investigated to enhance activity of the oxygen reduction reaction (ORR) for fuel cell applications. Prepared catalysts are characterized by various techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), and cyclic voltammetry (CV). XRD analysis shows that all prepared catalysts with different atomic ratio exhibit face centered cubic and have smaller lattice parameters than pure Pt catalyst. The mean particle size of the catalysts are between 4.3 to 6.3 nm. Cyclic voltammograms with scan rate 5 mV s-1 at 25oC obtain range the electrochemical active surface (EAS) between 40 to 164 cm2/mgPt, mass activity (MA) and specific activity (SA) of nanocatalysts PtNi/C in the potential range 900 mV versus RHE between 3.61 to 8.42 mA/mgPt, and 0.05 to 0.09.
SYNTHESIS OF CUMENE (ISOPROPYL BENZENE) FROM ROSIN OIL THROUGH CRACKING AND DEHYDROGENATION Savitri, -; Nasikin, Mohammad; Rinaldi, Nino; Ramdani, Dadi
Teknologi Indonesia Vol 36, No 3 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i3.212

Abstract

Cumene has been synthesized from rosin oil through cracking and dehydrogenation reactions using modified HZSM-5 catalyst. The research has successfully modifi ed the zeolite-based solid acid catalyst by adding Cu-Niand Ni-Mo metal as promoter. Modifi ed HZSM-5 catalysts were characterized using gravimetry and FTIR-pyridine method, and the result showed that the acidity of the catalyst was decreased. Catalyst activity test for cracking anddehydrogenation reactions were carried out to obtain condition of cumene production. The fi nal products were analyzed using GC-MS. Cu-Ni/HZSM-5 catalyst was suitable for the cracking-dehydrogenation reactions of rosinoil to produce cumene with process conditions of 30 bar and 450oC.
KAJIAN TEKNIS FROUDE NUMBER (Fn) UNTUK PENENTUAN KECEPATAN DINAS KAPAL EKONOMIS PADA KAPAL IKAN TRADISIONAL TIPE BATANG Nasikin, Mohammad; Hadi, Eko Sasmito; Budiarto, Untung
Jurnal Teknik Perkapalan Vol 1, No 2 (2013): April
Publisher : Diponegoro University

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Abstract

Kapal yang digunakan oleh nelayan untuk melaut masih menggunakan kapal ikan tradisional yang belum memiliki perhitungan dan masih dibuat secara turun temurun berdasarkan pengalaman membangun kapal ikan. Penelitian ini bertujuan untuk menghitung tahanan total (Rt), menghitung nilai Froude number (Fn) dan pengaruhnya terhadap nilai konsumsi bahan bakar dengan variasi kecepatan kapal ikan tradisional. Penyelesaian penelitian ini menggunakan software pendukung perkapalan seperti Delftship. Penelitian ini pada analisanya membuat pemodelan yang mewakili kapal sebenarnya. Setelah permodelan langkah selanjutnya adalah menganalisa tahanan, menghitung nilai Froude number (Fn) dan konsumsi bahan bakar. Hasil perhitungan didapat nilai tahanan total (Rt) terkecil pada lunas 11 meter sebesar 3.20 KN dan nilai (Rt) terbesar pada lunas 16 meter sebesar 5.37 KN, nilai tahanan terjadi pada kecepatan 7.50 knot. Pengaruh perubahan nilai Froude number (Fn) terhadap konsumsi bahan bakar paling irit pada kapal lunas 11 meter dengan kenaikan nilai (Fn) 0.30 – 0.40 perubahan kenaikan nilai konsumsi bahan bakar sebesar 6,21 liter/jam. Nilai terbesar ditunjukan pada kapal lunas 15 meter dengan kenaikan nilai (Fn) 0.30 – 0.40 kenaikan konsumsi bahan bakar sebesar 23,53 liter/jam.
Effect of Surfactant Addition on the Dispersion and Antioxidant Performance of Pyrogallol in Biodiesel Yusri, Silvya; Nasikin, Mohammad; Sutanto, Hery
Makara Journal of Science Vol. 24, No. 4
Publisher : UI Scholars Hub

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Abstract

Biodiesel is one of the most feasible energy sources that can be used as a replacement for fossil fuel. Biodiesel has several advantages over conventional fuels because of its availability, renewability, and high combustion efficiency. However, biodiesel that contains unsaturated fatty acid methyl esters is prone to oxidation during the blending process and storage period. The complete oxidation reaction of biodiesel produces insoluble gums that could potentially plug the fuel engines. This reaction has become the main barrier for biodiesel to compete with other biofuels. Among several methods, the addition of antioxidants is the most cost-effective method to prevent the oxidation reaction in biodiesel. Pyrogallol (PY), which is one of the best antioxidant additives for biodiesel, was used in this research to evaluate its performance. However, the fact that PY is partially soluble in biodiesel is considered a problem in the application of PY as an antioxidant additive in biodiesel. In this research, three different surfactants were added to increase the dispersion and performance of PY in biodiesel. Dispersion test, acid number analysis, and iodine value analysis were performed to evaluate the effect of surfactant addition on the dispersion and antioxidant performance of PY in biodiesel. The surfactant glycerol monostearate showed the best result in increasing the dispersion of PY in biodiesel compared with sorbitan monooleate and polyglyceryl-4-isostearate (PG4IS). By contrast, the best performance of PY in preventing the oxidation of biodiesel was achieved with the addition of PG4IS.
The Effect of Ca Content on CaO-Zeolite on Nitrogen Adsorption Capacity Nasikin, Mohammad; Utami, Tania Surya; Siahaan, Agustina TP
Makara Journal of Technology Vol. 6, No. 2
Publisher : UI Scholars Hub

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Abstract

In industry, Ca zeolite is used as nitrogen selective adsorbent with the use of PSA (Pressure Swing Adsorption)/VSA (Vacuum Swing Adsorption) methods. Natural zeolite modified to be Cao-zeolite by ion exchange process using Ca(OH)2. Adsorption test was done on CaO-zeolite with different Ca concentration to understand how it’s adsorption phenomena on oxygen and nitrogen. Adsorption test has been done for CaO-zeolite with Ca concentration = 0,682%, 0,849% and 1,244% to oxygen and nitrogen with equal concentration seperately. Pressure variation has being done three times (5 minutes long each time) adsorption time to analyze the connection between adsorption time and how many moles of nitrogen and oxygen being adsorbed. Adsorption test showed that there is a limit of Ca concentration to make CaO-zeolite more selective to adsorb nitrogen. CaO-zeolite with Ca concentration . 1,125% adsorb nitrogen more selective than oxygen. Because the nitrogen content in air is four times the oxygen so we can conclude that the air adsorption rate by zeolite will be four times the adsorption rate by oxygen. This differences in adsorption rate will make the use for CaO-zeolite as a oxygen enrichment equipment possible.
Cetane Number Booster Additive for Diesel Fuel Synthesized from Coconut Oil Nasikin, Mohammad; Arbianti, Rita; Azis, Abdul
Makara Journal of Technology Vol. 6, No. 2
Publisher : UI Scholars Hub

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Abstract

To reduce NOx, SOx, HC, and particulates that produce because of using diesel fuel, can be done by increasing cetane number. One of methods is adding an additive to diesel fuel. 2-Ethyl Hexyl Nitrate (2-EHN) is a commercial additive that an organic nitrate. Making an additive in this research is used palm oil by nitration reaction that used HNO3 and H2SO4. Result of this reaction is methyl ester nitrate that has a structure looks like 2-EHN. IR spectra from research show that methyl ester nitrate is indicated by spectrum NO2 at 1635 cm-1. This result show that methyl ester nitrate can be synthesized by nitration reaction and yield is 74,84% volume. Loading 1% methyl ester nitrate to diesel fuel can increase cetane number from 44,68 to 47,49.
Role of K3-xHxPW12O40 as a Catalyst in Selective Catalysis of Methylamine Synthesis from Ammonia and Methanol Nasikin, Mohammad
Makara Journal of Technology Vol. 7, No. 3
Publisher : UI Scholars Hub

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Abstract

Role of K3-xHxPW12O40 as a Catalyst in Selective Catalysis of Methylamine Synthesis from Ammonia and Methanol. Synthesize of methylamine from methanol and ammonia was studied in this research work using a partially potassium heteropoly salt (K3-xHxPW12O40 abbreviated as KPW) as a catalyst. KPW was prepared from heteropoly salt and potassium carbonate by using ion exchange method. The reaction was conducted at 600 ~ 800K and at the atmospheric pressure. Reactor used was a continue flow reactor with W/F=0,1~0,9g-kat.mnt./cc.Concentration of reactants and products were analyzed by gas chromathography while catalyst structure was observed by XRD (X-ray diffraction). Isothermal adsorption method was used for determining catalyst pore size. The result showed that ion exchange between H ion in zeolit with K ion produced potassium heteropoly salt that caused the change of interstitial space. The change of interstitial space was observed by the change of the lattice constant of the catalyst crystal. Trimethylamine(TMA) has molecule size smaller than catalyst pore size but bigger than molecular size of Dimethylamine (DMA) and Monimethylamine (MMA). This phenomenon caused the suppression of TMA formation. KPW has a rigid crystal structure and stabil during reaction. On the other hand, crystal structure of a non selective catalyst (NH4)3PW12O40 was not rigid and its pore size is easy to change depending on the product molecule size.
Modelling and Simulation of Packed Bed Catalytic Converter for Oxidation of Soot in Diesel Powered Vehicles Flue Gas Nasikin, Mohammad; Wulan, Praswasti P.D.K.; Andrianty, Vita
Makara Journal of Technology Vol. 8, No. 3
Publisher : UI Scholars Hub

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Abstract

Modelling and Simulation of Packed Bed Catalytic Converter for Oxidation of Soot in Diesel Powered Vehicles Flue Gas. Diesel vehicle is used in Indonesia in very big number. This vehicle exhausts pollutants especially diesel soot that can be reduces by using a catalytic converter to convert the soot to CO2. To obtain the optimal dimension of catalytic converter it is needed a model that can represent the profile of soot weight, temperature and pressure along the catalytic converter. In this study, a model is developed for packed bed catalytic converter in an adiabatic condition based on a kinetic study that has been reported previously. Calculation of developed equations in this model uses Polymath 5.X solver with Range Kutta Method. The simulation result shows that temperature profile along catalytic converter increases with the decrease of soot weight, while pressure profile decreases. The increase of soot weight in entering gas increases the needed converter length. On the other hand, the increase of catalyst diameter does not affect to soot weight along converter and temperature profile, but results a less pressure drop. For 2.500 c diesel engine, packed bed catalytic converter with ellipse’s cross sectional of 14,5X7,5 cm diagonal and 0,8 cm catalyst particle diameter, needs 4,1 cm length.
Biogasoline Production from Palm Oil Via Catalytic Hydrocracking over Gamma-Alumina Catalyst Wijanarko, Anondho; Mawardi, Dadi Ahmad; Nasikin, Mohammad
Makara Journal of Technology Vol. 10, No. 2
Publisher : UI Scholars Hub

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Abstract

Biogasoline Production from Palm Oil Via Catalytic Hydrocracking over Gamma-Alumina Catalyst. Bio gasoline conversion from palm oil is an alternative energy resources method which can be substituted fossil fuel base energy utilization. Previous research resulted that palm oil can be converted into hydrocarbon by catalytic cracking reaction with γ-alumina catalyst. In this research, catalytic cracking reaction of palm oil by γ-alumina catalyst is done in a stirrer batch reactor with the oil/catalyst weight ratio variation of 100:1, 75:1, and 50:1; at suhue variation of 260 to 340oC and reaction time variation of 1 to 2 hour. Post cracking reaction, bio gasoline yield could be obtained after 2 steps batch distillation. Physical property test result such as density and viscosity of this cracking reaction product and commercial gasoline tended a closed similarity. According to result of the cracking product’s density, viscosity and FTIR, it can conclude that optimum yield of the palm oil catalytic cracking reaction could be occurred when oil/catalyst weight ratio 100:1 at 340 oC in 1.5 hour and base on this bio gasoline’s FTIR, GC and GC-MS identification results, its hydrocarbons content was resembled to the commercial gasoline. This palm oil catalytic cracking reaction shown 11.8% (v/v) in yield and 28.0% (v/v) in conversion concern to feed palm oil base and produced a 61.0 octane number’s bio gasoline.
Co-Authors Abdul Azis Agustina Siahaan, Agustina Anondho Wijanarko Bambang Prasetya Dadi Mawardi, Dadi Eko Sasmito Hadi Heri Hermansyah Hery Sutanto Lilik Hendrajaya M Baiquni M Samsuri, M Mawardi, Dadi Ahmad Misri Gozan Nenen Rusnaeni Nino Rinaldi Praswasti Wulan, Praswasti R Mardias, R Ramdani, Dadi Rita Arbianti Savitri, - Siahaan, Agustina TP Tania Surya Utami Untung Budiarto Vita Andrianty, Vita Widodo Purwanto W. Wulan, Praswasti P.D.K. Yusri, Silvya