On On - - Line Analyses of Crude Feeds and Distillation Products: Line Analyses of Crude Feeds and Distillation Products: Utilization of On Utilization of On - - Line NMR on a Refinery Line NMR on a Refinery ’ ’ s Crude Distillation Unit s Crude Distillation Unit Paul J. Giammatteo Paul J. Giammatteo * * and John C. Edwards and John C. Edwards Process NMR Associates, LLC Process NMR Associates, LLC Danbury, Connecticut Danbury, Connecticut www.process www.process - - nmr nmr .com .com Process NMR Associates
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OnOn--Line Analyses of Crude Feeds and Distillation Products:Line Analyses of Crude Feeds and Distillation Products:Utilization of OnUtilization of On--Line NMR on a RefineryLine NMR on a Refinery’’s Crude Distillation Units Crude Distillation Unit
Paul J. GiammatteoPaul J. Giammatteo** and John C. Edwardsand John C. EdwardsProcess NMR Associates, LLCProcess NMR Associates, LLC
3 Day On3 Day On--line Crude Feed Analyses showing real time results for API Graviline Crude Feed Analyses showing real time results for API Gravity, ty, two TBP cut points (wt%, deg C), and sulfur. Crude 1 and Crude two TBP cut points (wt%, deg C), and sulfur. Crude 1 and Crude 2 are actually 2 are actually
crude blends of 3crude blends of 3--4 individual 4 individual crudes crudes plus refinery slops (2plus refinery slops (2--5% of blend).5% of blend).
Crude Adjustment
0
10
20
30
40
50
60
70
80
90
100
-150 50 250 450 650 850 1050CutPoint Deg C
WT%
Yie
ld
BeforeAfterNMR
Crude Reconcilation
•Crude Assay Data may be old. Crude Composition has changed over time.
•Every Crude Tank has a heel of mixed Crudes received earlier. Crude in a Tank will settle.
•A Crude Switch (normally 7 to 8 hours) leaves you with an unknown Blend of the old and new Crude
Actual Concentration ( C1 )Actual Concentration ( C1 )
Pred
icte
d C
once
ntra
tion
( F7
C1
)Pr
edic
ted
Con
cent
ratio
n ( F
7 C
1 )
0
15
30
45
0 15 30 45
0
15
30
45
0 15 30 45
1
2345
6
78
9 10
11
12
13
14
15
1617
18
19
20
21
22
23242526
27
28
2930
31
323334
35
36 3738
39
40
41
42
43
44
45464748
49
50
52
53
54
55
575859
606162
63
64
6667
68
70
7172 737475
7677
78
7980 8182
83
85
87
8889 9091
93
94
0
15
30
45
0 15 30 45
Actual 13C NMR Result (At% C)
1 H N
MR
Pre
dict
ed R
esul
t (A
t% C
) R2=0.997SECV=0.6 atomic % Carbon
Base Oil and VGO Carbon Aromaticity by 1H NMR and PLS in One Model
Process NMR Associates
Process NMR Associates
Process NMR Associates
SummarySummaryHigh Resolution NMR is now possible in a wide variety of onHigh Resolution NMR is now possible in a wide variety of on--line, line,
process environments.process environments.Simultaneous, multiSimultaneous, multi--parameter analyses can be performed using parameter analyses can be performed using
either direct measurements or either direct measurements or chemometric chemometric based correlations.based correlations.The hardware has been proven stable, robust, and available.The hardware has been proven stable, robust, and available.Economic paybacks, especially when linked to advanced process Economic paybacks, especially when linked to advanced process
control applications are substantial.control applications are substantial.
Process NMR Associates
AcknowledgementsAcknowledgements
J. Cijntje and S. Ranganathan, Isla Refinery, CuracaoT. Cohen, Foxboro NMR Ltd, Israel
