LARTC, Miami 27-28 February 2012 - Global Technology Forum

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LARTC, Miami 27-28 February 2012 - Global Technology Forum

LARTC, Miami 27-28 February 2012

New catalyst technology to improve diesel yields in

hydrocracking configuration

Olivier Cabezudo, YPF SA

Arturo Betatti, Haldor Topsoe


Introduction

• Diesel demand higher in the winter

season

• Euro IV specifications

• Hydrocracker significant

contributor to the diesel production


Unit overview and history

• Commissioned in 1971

• 2 parallel reactors

• No unconverted oil from

fractionator

Gases

Nafta

JP1

Gasoil

H2


Objectives and challenges

• Maximise

– Gasoil production

– Cycle length

– Feed end point

• Production of low cloud point diesel

– High end point

– No UCO outlet

• Limited conversion

– High LE yields

• Lower end point by recycling

– Lower capacity


Possible solutions

• Hardware options

– Fractionator revamp (has been considered)

• Lube production?

• Cost, yield loss

– Post-treatment (dewaxing)

• Yield loss

• Capex

– Catalyst system replacement

• Enough?


Catalyst evaluation process

+1 year cycle

Good

performance

System ”B”

System ”A”

2001 2004 2007 2010

Feed

samples

Testing

Topsoe

Testing

YPF

Catalyst

selection

Catalyst

installation

2012


Catalyst evaluation (objectives to meet)

• Cycle length -> Add activity, lower deactivation

– Add pretreatment

– N tolerant catalyst

• Diesel yield

– Increase selectivity (without losing activity)

– Prevent ”overcracking” (no need to recycle)

• Diesel cold flow properties

– Increase isomerisation → Higher end point diesel

• Ability to process heavier feeds

– Stability, activity… All of the above


Yield, wt%

Cloud point, °C

Catalyst evaluation

• Catalyst system A

– Simulate the current system

• Catalyst system B

– The optimal system

15

10

5

0

-5

-10

-15

-20

Catalyst A

Catalyst B

90

80

70

60

50

40

30

20

10

0

Catalyst A

Catalyst B

y

C5-130°C C130-180°C >180°C

Catalyst system B

Increased activity

Better diesel yield

Better cold flow properties

Ability to process heavier feed


Implementation

• Catalyst installed in Dec. 2010

– Operating for more than 12 months

– Stable performance

• Comparison

Previous cycle

Current cycle


Diesel cloud point, °C

Gasoil product

20

Cloud point vs. end point

10

0

Actual

Test

-10

-20

Chromatogram of diesel product

High content of iso-paraffins

-30

340 390 440

Final boiling point, °C

Historical data

Current cycle

Cloud point, °C 5 to 12 -5 to -20 (0 to -30)

Yield, m 3 /day Base Base + 550


Future perspective

Cold flow properties

”Like!”

End point?

Increase capacity

”Like!”

High O

Co-processing of renewable

feeds

High n-paraffin

High H 2 consumption


Conclusion

Excellent performance

Good stability

No increase in H 2 consumption

Objectives

achieved!

Pilot plant test results proven in

industrial unit

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