C N G (Compressed Natural

Gas)

Dr. Slamet

Pengolahan Gas Pengolahan Gas Bhn Bhn BakarBakar

SeparasiSeparasi

Gas Gas SweeteningSweetening

Gas DryingGas Drying

Hg-removalHg-removal

FraksinasiFraksinasi

PendinginanPendinginan& Pencairan& Pencairan

KompresiKompresi

Gas BumiGas BumiLNGLNG

CNGCNG

Gas PipingGas Piping

C1C1

C2+C2+LPGLPGRefrigerantRefrigerantKondensatKondensat

SynGasSynGas GTLGTLFischer TropsFischer Trops

Volume ReductionVolume Reduction

• LNG volume reduction: 600 times (all liquids at atmospheric pressure and –256 F)

• CNG volumes reduction: function of pressure and temperatures

• Higher pressure and lower temperature lead to higher volume reduction

• CNG volume reduction examples:P = 2850 psig 206 times at 100 F & 280 times

at 32 FP = 1400 psig 103 times at 100 F & 133 times

at 32 F

100

150

200

250

300

350

400

450

-60 -50 -40 -30 -20 -10 0 10 20 30 40

Temperatur, C

R-C

NG

= V

ol.G

as/V

ol.C

NG

P = 2000 psia P = 2500 psiaP = 3250 psia P = 3650 psia

CNG Volume ReductionCNG Volume Reduction

Pengaruh C3+ dan H2O

0.6

0.7

0.8

0.9

1

1.1

0 5 10 15 20 25 30 35Konsentrasi C3+ atau H2O, %

Fra

ksi u

ap

Pengaruh C3+

Pengaruh H2O

Pengaruh impurities pada CNG

Terrestrial CNG Technology: Terrestrial CNG Technology: TransCanadaTransCanada

Marine CNG Technology: Marine CNG Technology: VOTRANS (EnerSea)VOTRANS (EnerSea)

Using bundles of steel pipes containing the gas under optimized Pressure & Temperature

Incorporating spools

of coiled tubing

Marine CNG Technology: Marine CNG Technology: CoselleCoselle (Williams) (Williams)

CNG gas quality standard CaliforniaCNG gas quality standard California

C1 88.0 % minC2 6.0 % maxC3 and higher HC 3.0 % maxC6 and higher HC 0.2 % maxHydrogen 0.1 % maxCO 0.1 % maxOxygen 1.0 % maxCO2+N2 1.5 – 4.5 %Sulphur 16 ppmv (max)

Gas Sweetening

Compression

Gas Dehydration

Fractionation Feed Gas

Tube truck CNG

BFD utk CNG Terrestrial

BFD utk CNG Marine

1. Jatinegara

2. Tambun

3. Cikarang

4. Rengasdenklok -O 5. Rengasdenklok -N

6. Cilamaya Selatan

7. Bojong Raong

8. Pagaden

9. Pasir Jadi Naik

10. Tunggul Maung

11. Melandong

12. Kandanghaur Timur

13. Cemara Selatan

14. Sindang

15. Gantar

16. Tugu

17. Jatibarang

18. Randegan

5

Flare Gas

Stranded Gas

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