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All Journal Scientific Contributions Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI (LPMGB)
E Jasjfi
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Chemical Engineering, Chemistry & Bioengineering Energy

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1982 3rd Ascope Laboratories Test Correlation Programme On C.F.R. Engine Bustani Mustafa; E Jasjfi
Scientific Contributions Oil and Gas Vol 6 No 1 (1983)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.6.1.904

Abstract

During the 2nd Workshup on the ASCOPE Laboratory Test Correlation Programme which was, held in Kuala Lumpur 17 - 18 August 1981, the following consensus was reached among participating laboratories : • The frequency of the correlation test programme should be increased to twice a year. • Testing should be carried out at the same day and time specified by the Programme coordinator. • Testing should be carried out according to the same procedure (bracketing Method). Member countries taking part in this correlation programme are Indonesia as coordinator with seven laboratories participating, Malaysia with one laboratory, Thailand and the Philip- pines with two laboratories each. The coordinator in this correlation programme is respon- sible in preparing the correlation samples and sending them by air to each participating laboratory. The first part of this programme (3rd Correlation Programme) was started by sending samples in January 1982 and the second part (4th Correlation Programme) was starting by sending samples in March 1982. It will appear in the next publication. After being tested by the participating laboratories, the test result are to be sent to the coordinator for the determination of the standard deviation and other statistical data. Based on these results, conclusions can be drawn about the deviation of laboratory test results and about outliers to be rejected. For better analysis of the results, for each of the samples for correlation it is also required to report physical and chemical tests such as specific gravity, R.V.P., distillation and lead (TEL) content in the receiving laboratories. This is necessary in order to take into account any possible changes in the sample properties which might have occured during transporta- tion and storage. Also to be observed are ambient and engine operating conditions during the correlation tests. The results of this analysis can then be used as a base for deviations the occurence of outliers and recommendation of remedial steps to be taken. d The method used for testing the samples is the bracketing method, while for rounding the value of the member found during the tests the ASA rules for rounding are used. SADIM The Grubb's rejection criteria with the use of "T" factors is used in evaluating the possible outliers. • Presented by the Indonesian Technical Committee to the Workshop on ASCOPE Laboratory held in Bangkok, Thailand, 9- 11 October 1982.
Hydroconversion Of Heavy Distillate Into Lube Base Stock Using Bi-Functional Catalysts A.S. Nasution; E Jasjfi
Scientific Contributions Oil and Gas Vol 21 No 2 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.2.956

Abstract

Hydroconversion process replaces the furfural stage and dewaxing part of conventional processs of lube base stock production. To study the ability of this hydroconversion process to weed low viscosity index component out of heavy distillate fraction to produce high viscosity index lube base stock,  an experiment has been carried out on the hydroconversion of three feedstock types, I,e,: non-paraffinic vacuum distillate (NPVD), paraffinic vacuum distillate (PVD) and paraffin-wax (WAX), using three bifunctional catalysts having low, medium abd high acidities. The experiment was done at the following operating conditions: temperature from 380° to 420°C, pressure: 100 kg/cm² and H₂/HC ratio: 1000 L/L using a Catatest Unit operated in continuous system.The experimental data shows that at 50% by wt. feedstock conversion, the yields and viscosity index of lube base stock product are 20.7% by wt. and 118; 25.5% by wt. and 136; and 29.5% by wt. and 164 for NPVD, PVD and high acidity bifunctional catalysts, respectively. By conventional process, PVD feedstock produces 10-15% by wt. lube base stock with viscosity index lube 90 to 100.The high viscosity index of lube base stock product, obtained by hydroconversion process, suggest that a part of condensed aromatics is converted into naphthenes, which are then selectivity hydrocracked into single alkyl aromatics by both the metal site and acid site of the bifunctional catalysts. With medium and high acidity bifunctional catalysts, isomerization and cyclization of wax feedstock into isoparaffins and single ring alkyl-naphthene ring of vacuum distillate feedstock into single ring alkyl-aromatic is quite dominant with medium acidity catalyst.
Pengaruh Racun Butilamina pada Dehidrogenasi Sikloheksana dan Hidroisomerisasi N.heptana dengan Katalis Bifungsional A.S Nasution; E Jasjfi; Evita H Legowo
Lembaran publikasi minyak dan gas bumi Vol 38 No 3 (2004)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.38.3.756

Abstract

Merosotnya mutu minyak bumi, dan meningkatnya program langit biru yang menuntut spesifikasi bahan bakar bensin ramah lingkungan yang sangat ketat, menghasilkan penyempurnaan komposisi bensin dengan meningkatkan komponen bensin isomerat dan pembatasan proporsi reformat, bensin rengkahan katalitik, dan bensin polimer. Pencampuran komponen bensin isomerat tersebut dengan komponen bensin reformat akan meningkatkan distribusi angka oktana dengan sekaligus penurunan kadar benzena dan total aromat yang kadarnya dalam bensin dibatasi. Proses hidroisomerisasi umpan nafta dengan katalis hidroisomerisasi bi functional menghasilkan produk komponen bensin isomerat. Katalis bi functional tersebut mengandung inti aktif logam (Pt) dan inti aktif asam (A12 03 -C1,A12 O3 -SIO2 dan zeolit). Untuk meneliti mekanisme reaksi hidroisomerisasi parafin rendah, suatu penelitian dilakukan tentang pengaruh racun katalis normal butilamina pada reaksi hidroisomerisasi normal heptana dengan katalis bifungsional. Reaksi dehidrogenasi sikloheksana dilakukan untuk penelitian pengaruh racun katalis tersebut pada inti aktif logam katalis bifungsional. Penelitian dilakukan pada kondisi operasi : suhu dari 370o sampai 4000 C, takanan 20 kg/cm2 dan H2 /HC: 6 mol/mol pada alat Catatest Unit yang dioperasikan secara kontinu. Peranan inti-inti aktif katalis bifungsional pada mekanisme reaksi hidroisomerisasi parafin dan deaktivasi kedua jenis inti aktif dari katalis bifungsional oleh racun normal butil amina disajikan dalam makalah ini.
Deaktivasi Katalis oleh Kotoron Umpan Nafta Proses Reformasi A.S Nasution; E Jasjfi; Evita Legowo
Lembaran publikasi minyak dan gas bumi Vol 38 No 3 (2004)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.38.3.758

Abstract

Meningkatkan kebutuhan akan bahan bakar bensin ramah lingkungan dan hidrokarbon aromatik untuk bahan baku industri untuk meningkatkan jumlah kedua jenis produk tersebut. Proses reformasi nafta dengan katalis bifungsional dapat menghasilkan komponen bensin bermutu tinggi dan hidrokarbon aromatik rendah (benzene, toulena,dan silena). Umpan nafta mengandung kotoran-kotoran molekul non-hidrokarbon senyawa organik sulfur, nitrogen, oksigen dan juga organik logam, sehingga umpan nafta tersebut perlu dimurnikan lebih dulu pada proses hidromurnian. Katalis reformer bifungsional mempunyai inti aktif logam (mono dan bi-metal) dan inti aktif asam (Al2 O3 C1). Kotoran non-hidrokarbon umpan nafta dapat menurunkan aktivitas katalis reformer bi-fungsional. Untuk meneliti masalah keracunan inti aktif logam katalis reformer bifungsional, telah dilakukan sutu penelitian tentang pengaruh senyawa tiofen, normal butyl amine, etanol dan tetra etil plumbum pada katalis reformer mono dan bi-metal dengan memakai Catatest Unit.
Co-Authors A.S Nasution A.S. Nasution Bustani Mustafa Evita H Legowo Evita Legowo Hono Witono