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All Journal Scientific Contribution Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
Lisna Rosmayati
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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A Rapid Gas Chromatography Method For Simultaneous Determination Of Lpg Compounds Nofrizal; Lisna Rosmayati; Yayun Andriani
Scientific Contributions Oil and Gas Vol. 36 No. 3 (2013): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.36.3.18

Abstract

A rapid gas chromatography method using a HP Plot/Al2O3 column for the determination of thirteen compounds of LPG (Liquefied Petroleum Gas) standard (ethane, propane, propylene, iso-butane, n-butane, trans-2-butene, 1-butene, isobutylene, neo-pentane, cis-2-butene, iso-pentane, n-pentane, 1,3 butadiene) was developed. The LPG components were separated in about 8 min by gradient elution program and helium was used as a carrier gas at a flow rate of 5 mL min-1, The relative standard deviation (RSD) for the LPG standard concentration were found to range between 0.27-1.91 % . The method had been applied to the determination of the 10 LPG samples. The composition of analyzed samples have comply with the Indonesian LPG specification for each parameter (C2<0.8 % mol, C3+C4>97 % mol and C5+.<2.0 % mol).
The Improvement Of Mercury Removal In Natural Gas By Activated Carbon Impregnated With Zinc Chloride Lisna Rosmayati
Scientific Contributions Oil and Gas Vol. 35 No. 1 (2012): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.35.1.22

Abstract

Natural gas being produced from gas fi elds around Indonesia areas, along with a large number of other harmful substances (CO2,H2S, RSH,COS etc) often contains mercury. Even in small amounts, mercury and its compounds have an extremely harmful effect on human health. Mercury content in the natural gas should be removed to avoid equipment damage in the gas processing plant or the pipeline transmission system from mercury amalgamation and embrittlement of aluminium. Mercury can be removed by using adsorption processes such as activated carbon that is impregnated with chlor, iodine or sulfur. This research is dealing with the process of mercury removal from gas based on principle of adsorption and of chemisorption of mercury by means of activated carbon impregnated with ZnCl2. Time of impregnation is a signifi cant variable that can effect adsorption capacity. The experiment results showed that ZnCl2 impregnation time of 12 hours signifi cantly enhanced the adsorptive capacity for mercury vapour.
EFFECT OF ACTIVATION TEMPERATURE AND ZnCl2 CONCENTRATION FOR MERCURY ADSORPTION IN NATURAL GAS BY ACTIVATED COCONUT CARBONS Lisna Rosmayati
Scientific Contributions Oil and Gas Vol. 38 No. 1 (2015): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.38.1.237

Abstract

Elemental mercury from natural gas has increasingly become an environmental concern due to its high volatility and toxicity. Activated carbon adsorption is an effective mercury control method. Mercury content in natural gas should be removed to avoid equipment damage in the gas processing plant or the pipeline transmission system. This research describes the process of mercury removal from natural gas by coconut active carbon impregnated with ZnCl2. Activation temperature and ZnCl2 solution concentration are significant affect the mercury adsorption capacity. Charcoal was prepared from coconut shell and activated at 500, 700 and 900oC in constant fl ow of nitrogen. The effect of activation temperature and ZnCl2 concentration for mercury adsorption on adsorbent show that the adsorption ability of adsorbent is affected by increasing activation temperature up to an optimum temperature of 700oC. Ability of adsorption increases with increasing ZnCl2 concentration and mercury adsorption was optimum at 7% concentration of ZnCl2. The results indicated that the adsorption capacity of mercury in natural gas by activated carbon-impregnated chlor is very signifi cant. The conclusion of this paper is that optimum activation temperature 700oC and 7% ZnCl2 impregnated on adsorbent can improve the mercury adsorption in natural gas.
A New Approach for East Natuna Gas Utilization Fiqi Giffari; Paramita Widiastuti; Lisna Rosmayati; Nofrizal Nofrizal; Dadan Kusdiana
Scientific Contributions Oil and Gas Vol. 44 No. 3 (2021): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

The Natuna Gas Field has a potential gas reserve of 222 TCF, but this gas field has a very high CO, content of up to 71%. The high composition of CO, content and its location, which is too far from the market, causes the best option to use the Natuna's gas by converting it to liquid. Dimethyl Ether (DME) is a choice of liquid products that have a good potential as alternative energy for household LPG. A more in-depth study of the options for using the Natuna's gas into DME product via direct process was carried out in this study. The methodology used is initiated by determining the type of facilities needed and then conducting a process simulation to determine the mass balance, energy balance, and design of the equipment used. Process simulation and economic simulation show that the Natuna Gas Field is technically feasible to be developed into a DME product with a capacity of 1,800 MMSCFD, resulting in 21,245 MT/day DME. Upstream and downstream integration economic scheme produces a better economic result (ROI: 6.34%) compared to an upstream economic scheme (ROI: 0.63%). Apart from that, tax incentives on the downstream scheme can increase the project economy, and the scenario of tax holiday is the most beneficial for developers and the government.
Optimalisasi Metode Aktivasi Adsorben Karbon Aktif dengan Sulfur, Tembaga, Sulfida, dan Seng Klorida Serta Uji Kapasitas Adsorpsi dengan Variasi Kondisi Saturasi Gas Alam Eko Handoyo; Yayun Andriani; Lisna Rosmayati; Annisa Chairuna; Endi Suhendi
Lembaran Publikasi Minyak dan Gas Bumi Vol. 54 No. 3 (2020): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Hidrokarbon berat diketahui dapat terkondensasi dalam pori karbon aktif sehingga menurunkan kapasitas adsorpsi adsorben merkuri yang terbuat dari karbon aktif. Untuk itu, perlu dilakukan modifikasi karbon aktif agar memiliki kapasitas adsorbsi merkuri yang optimum untuk digunakan pada lapangan migas. Penelitian ini diawali dengan tahap rancang bangun alat uji kinerja skala lab dan dilanjutkan dengan optimalisasi metode pembuatan adsorben merkuri AC-S, AC-CuS, dan AC-ZnCl2. Adsorben yang dihasilkan dari metode pembuatan yang telah dioptimalisasi kemudian diuji adsorpsi pada temperatur embun hidrokarbon berat/temperatur uji adsorpsi 15oC/40oC, 25oC/40oC, 30oC/30oC, dan 40oC/40oC serta dikarakterisasi luas permukaannya. Dari hasil penelitian ini didapatkan bahwa kapasitas adsorpsi adsorben yang dibuat tidak mengalami penurunan kapasitas adsorpsi Hg saat melewatkan gas dengan titik embun air dan hidrokarbon sama dengan suhu proses adsorpsi. Dari penelitian ini juga dihasilkan dua metode pembuatan adsorben terbaik yang diuji pada skala laboratorium yaitu impregnasi Sulfur 33% pada temperatur 525oC selama 1 jam dengan kapasitas rata-rata 50.g mg Hg/g dan impregnasi tembaga (Cu) 34 g/l dan Sulfur 20% dengan kapasitas adsorpsi rata-rata 30.4 mg/g.
PEMANFAATAAN GAS SUAR BAKAR MENJADI DIMETHYL ETHER (DME) Paramitha Widiastuti; Lisna Rosmayati; Fiqi Ghifari
Lembaran Publikasi Minyak dan Gas Bumi Vol. 52 No. 3 (2018): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Gas suar bakar merupakan gas yang dihasilkan oleh kegiatan eksplorasi dan produksi atau pengolahan minyak dangas bumi yang dibakar karena tidak dapat ditangani oleh fasilitas produksi atau pengolahan yang tersedia sehinggabelum termanfaatkan. Data menunjukkan bahwa jumlah gas suar bakar di Indonesia tahun 2017 masih cukup besaryaitu 148 MMSCFD.
KAJIAN PENDUKUNG REVISI KADAR AIR DAN PARTIKULAT DALAM SPESIFIKASI COMPRESSED NATURAL GAS (CNG) UNTUK KENDARAAN BERMOTOR Lisna Rosmayati; Yayun Andriani; Nata Pringgasta
Lembaran Publikasi Minyak dan Gas Bumi Vol. 49 No. 3 (2015): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Persyaratan rendahnya kadar air di dalam bahan bakar gas (CNG) yang ada di RSNI CNG secarateknis tidak praktis dan tidak ekonomis. Hasil analisis data menunjukkan kadar air sebesar 7,19 Lb/MMSCF cukup memadai untuk kondisi dan iklim di Indonesia
ADSORBEN PENGERING GAS BUMI UNTUK MEMINIMALKAN KADAR AIR DALAM BAHAN BAKAR GAS (BBG) Yayun Andriani; Lisna Rosmayati
Lembaran Publikasi Minyak dan Gas Bumi Vol. 51 No. 1 (2017): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Batasan kadar air dalam bahan bakar gas bumi di Indonesia seringkali tidak dapat dipenuhi karena keterbatasan fasilitas yang dimiliki SPBG. Rancang bangun pengering gas bumi saat ini telah memiliki pangsa pasar di dalam negeri. Alat ini mampu menurunkan kadar air dalam gas bumi yang dimanfaatkan Stasiun Pengisian Bahan Bakar Gas (SPBG) dan industri. Penelitian ini memodi¿ kasi karbon aktif sebagai adsorben dengan cara pembuatan pellet karbon aktif dengan menggunakan bentonit sebagai penyangga yang divariasikan dan dicampur dengan KOH lalu direndam pada suhu kamar. Adsorben dipanaskan lalu dibentuk pellet kemudian dipanaskan kembali pada suhu tinggi sebelum dikalsinasi. Setelah itu dilakukan karakterisasi untuk mengetahui sifat dan karakter pellet adsorben. Hasil uji menunjukkan bahwa pellet adsorben masih menyerap air hingga akhir pengujian mencapai 50% berat karbon aktif. Hasil penelitian diketahui bahwa adsorben ini dapat menurunkan kadar air dalam gas bumi dari 35 lb/MMScf menjadi minimum sekitar 5-6 lb/MMScf.
Optimalisasi Kinerja Pilot Plant Adsorber Merkuri Untuk Gas Bumi Lisna Rosmayati; Yayun Andriani; Nofrizal; Nata P
Lembaran Publikasi Minyak dan Gas Bumi Vol. 48 No. 1 (2014): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Pengujian optimalisasi kinerja adsorber mercury removal bertujuan untuk menghitung seberapa besar penurunan tekanan dalam sistem (pressure drop), menghitung besarnya e¿ siensi penyerapan dari adsorben dan menghitung masa pakai (life time) adsorben. E¿ siensi penyerapan tergantung pada jenis adsorben (karbon aktif) dan akan mempengaruhi waktu tinggal merkuri serta besarnya penurunan tekanan sistem (pressure drop). Impregnant (ZnCl2 ) berpengaruh pada masa pakai (life time) dan waktu tinggal. Kapasitas penyerapan adsorben karbon aktif tempurung kelapa adalah 0,124 Kg-Hg/Kg-Carbon. Jadi untuk 1 kg adsorben karbon aktif tempurung kelapa yang telah diaktifasi, mampu menyerap merkuri dalam gas bumi sebesar 0,124 kg Hg. Untuk e¿ siensi penyerapan, diperoleh rata-rata e¿ siensi penyerapan karbon aktif tempurung kelapa terhadap merkuri dalam gas bumi di titik inlet dan outlet adsorber adalah 95,74 %. Hasil kegiatan penelitian optimalisasi kinerja adsorber pilot plant merkuri removal gas bumi diperoleh karakteristik adsorben merkuri yang meliputi bilangan iodin rata-rata 889 mg/gram, luas permukaan adsorben setelah aktifasi ¿ sika 1052 m2 /g, setelah aktifasi kimia 724 m2 /g, impregnasi klor 4,39 % dan parameter uji yang mewakili spesi¿ kasi adsorber meliputi pressure drop 1,7526 psig/ft, kapasitas penyerapan 0,124 kg-Hg/kg-carbon, adsorben dan masa pakai (lifetime) adsorbennya adalah 28 tahun.
Co-Authors Annisa Chairuna Dadan Kusdiana Eko Handoyo Endi Suhendi Fiqi Ghifari Fiqi Giffari Nata P Nata Pringgasta Nofrizal Nofrizal Nofrizal Nofrizal Paramita Widiastuti Paramitha Widiastuti Yayun Andriani