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TEKNOLOGI MIGAS –CRUDE ASSAY ANALYSIS

Crude Assay Analysis

Diesel Cut with TBP Cut Points 2500-3000C

on Kuwait Crude

T1 = 250oC

T2 = 300oC

Penentuan % Volume Distillate on Crude

Figure A 2.1Didapatkan % volumedistillate on crude

sbb :T1 =2500C = 35 %

T2 =3000C = 44%

Sehingga cut range : = 44% - 35 % = 9 %

Penentuan 90 % TBP cut

90 % TBP cut = (0.9 x %cut range) + % vol ditillate on crude untuk T1 90 % TBP cut = (0.9 x 9%) + 35% = 43,1 %

Penentuan TBP untuk 43.1% volume distillate on crude

Figure A 2.1didapatkan T3 = 294.915oC

Penentuan TBP ASTM EP dan 90%

Konversi suhu : T3 = 294.915o C

= (294.915*9/5) +32 = 562.847oFT2 = 300oC

= (300*9/5) + 32 = 572oF

Penentuan TBP ASTM EP dan 90%

T2 = 572oF ( >500 oF ) maka menggunakan kurva D : Didapatkan add oF = 16.418oFASTM EP = 572oF – 16.418oF= 555.582oF

T3 90% maka menggunakan kurva G : Didapatkan add oF = 36,512 oF, ASTM 90% = 562.85oF – 36.512oF= 526.338oF

Kurva pseudo-component breakdown by mid-boiling points

Figure A.14 Probability graph

for ASTM distillations

Kurva pseudo-component breakdown by mid-boiling points

Diperoleh data sbb:

% Over

T

0 470

5 488

10 490

15 497

20 500

25 500.5

30 502

35 504

40 506

45 507.5

50 510

% over T

55 512

60 513

65 515

70 517

75 519

80 520

85 522

90 526.34

95 539

100 555.58

0 20 40 60 80 100 120420

440

460

480

500

520

540

560

580

Pseudocomponent Breakdownby Mid Boiling Points

Komponen % VolumeMid -

BPT (0F)Mid -

BPT (0C)1 3,6 478,3 247,92 20,5 496,3 257,93 19,8 503,9 262,24 12,1 509,2 265,15 12,0 514 267,86 12,0 518 270,07 12,0 523,4 273,08 8,0 542 283,3  100,0