North Atlantic Refining, Ltd

Criterion Catalysts & Technologies L.P. and Zeolyst International

Shell Global Solutions International BVSession

A Hydrocracking Success Story

2007 Annual Meeting

Story Outline:• Issues and Challenges faced by North

Atlantic Opportunities Profitability

Tailored catalyst systemMitigation of excessive reactor pressure dropInstallation of state-of-art reactor internals

• Solutions from Collaboration

• Results and Benefits• Conclusions

2007 Annual Meeting

North Atlantic Refining, Ltd.

• Location: Newfoundland, Canada• Refinery first start up: 1973• Refinery throughput: 115,000 barrel per day • Proximity to sour crude supplies• Main conversion unit: 37,000 barrel per day

hydrocracker

2007 Annual Meeting

ProductSeparation

System

Recycle Oil Bottoms Product(Bleed)

LPG

Light Naphtha

HeavyNaphtha

JET

DIESEL

ProductSeparation

System

Recycle Oil Bottoms Product(Bleed)

LPG

Light Naphtha

HeavyNaphtha

JET

DIESEL

Feed

Hydrocracker Configuration

2007 Annual Meeting

2007 Annual Meeting

North Atlantic

Criterion/Zeolyst Shell Global Solutions

2007 Annual Meeting

Essential Teamwork

2007 Annual Meeting

Catalyst Challenges:

• Process more difficult and sour feedstocks

• More stringent distillate product specs

• Sub-optimal product yield slate and cycle life limitation due to LPG make

2007 Annual Meeting

2007 Annual Meeting

DN-3300

RM-5030

Z-673

Z-623

Our Solution:Tailored Catalyst System

• RM-5030: high HDM

• DN-3300: Centinel Gold HDN

• Z-673: high hydrogenation

• Z-623: high hydrogenation

2007 Annual Meeting

DN-3300

RM-5030

Z-673

Z-623

Our Solution:Tailored Catalyst System

Balanced activity and selectivityOptimal product slateSignificantly reduced LPG makeExcellent ULSD product qualities

• RM-5030: high HDM

• DN-3300: Centinel Gold HDN

• Z-673: high hydrogenation

• Z-623: high hydrogenation

2007 Annual Meeting

Catalyst Utilization Challenge:

• Poor Radial Temperature profile, flow maldistribution and high radial delta T’s

2007 Annual Meeting

2007 Annual Meeting

Reactor Radial Temperature Profile

0

10

20

30

40

50

60

08/01/02 02/17/03 09/05/03 03/23/04Date

Rad

ial d

elta

Tem

pera

ture

°F

B 1 Outlet

B 2 Outlet

B 3 Outlet

2007 Annual Meeting

Reactor Radial Temperature Profile

0

10

20

30

40

50

60

08/01/02 02/17/03 09/05/03 03/23/04 10/09/04 04/27/05 11/13/05Date

Rad

ial d

elta

Tem

pera

ture

°F

B 1 Outlet

B 2 Outlet

B 3 Outlet

Previous CycleTop Bed Changed to Competitor Catalyst

2007 Annual Meeting

Shell High Dispersion Tray – HD Tray

2007 Annual Meeting

• Tray to homogenize vapors and liquids

• Eliminates thermal maldistribution for lower beds

Shell’s Proprietary Interbed Mixing Technology

Ultra Flat Quench (UFQ) Interbed Internals

2007 Annual Meeting

Reactor Radial Temperature Profile

0

10

20

30

40

50

60

08/01/02 05/28/03 03/23/04 01/17/05 11/13/05 09/09/06 07/06/07Date

Rad

ial d

elta

Tem

pera

ture

°F

B 1 Outlet

B 2 Outlet

B 3 Outlet

Previous Cycle Current Top Bed Changed

2007 Annual Meeting

Reliability Challenge:

• High pressure drops across top bed and entire reactor circuit

2007 Annual Meeting

2007 Annual Meeting

Previous Cycle Top Bed Changed

PSIPressure Drop

(Incrementsof 5 PSI)

Reactor Pressure Drop

08/01/02 02/17/03 09/05/03 03/23/04 10/09/04 04/27/05 11/13/05

2007 Annual Meeting

Filter Tray – Removal ofcontaminants brought in by feed

• Traps particulate materials, easy to clean and reuse

• Located in the top head – does not occupy reactor catalyst volume

2007 Annual Meeting

• Lower density• Lower pressure drop• Shorter diffusion path

length

TL and TX Catalyst Shape

TL

TX

2007 Annual Meeting

08/01/02 05/28/03 03/23/04 01/17/05 11/13/05 09/09/06 07/06/07

Previous Cycle

Current Cycle

Top Bed Changed

Reactor Pressure Drop

PSIPressure Drop

(Incrementsof 5 PSI)

2007 Annual Meeting

Benefits for North Atlantic

2007 Annual Meeting

Reactor Weighted AverageBed Temperature (WABT)

5 YearsWABT °F(Increments

of 20)

0 200 400 600 800 1000 1200Days on Stream

Previous

Current

2007 Annual Meeting

Cracking Conversion

PercentConversion (Increments

of 1 %)

0 200 400 600 800 1000 1200

Days on Stream

Previous

Current

2007 Annual Meeting

LPG Production Comparison

BarrelsPer Day

(Increments of 200)

0 200 400 600 800 1000 1200Days on Stream

Previous

Current

2007 Annual Meeting

0 200 400 600 800 1000 1200

Days on Stream

Distillate Yield

Percent ofFresh Feed (Increments

of 5%)

Previous

Current

2007 Annual Meeting

Previous

Current

Bottoms API Gain

API Gain (Increments

of 1)

0 200 400 600 800 1000 1200

Days on Stream

2007 Annual Meeting

Hydrogen Consumption

0 200 400 600 800 1000 1200

Days on Stream

Previous

Current

H2Consumption(Increments

of 50 scf/bbl)

2007 Annual Meeting

ULSD Sulfur Monitoring

0

20

40

60

80

100

120

08/01/02 05/28/03 03/23/04 01/17/05 11/13/05 09/09/06 07/06/07Date

Bot

tom

s S

(ppm

)

Previous Cycle Current Cycle

Top Bed Changed

Operating Limit

2007 Annual Meeting

0

20

40

60

80

100

120

08/01/02 05/28/03 03/23/04 01/17/05 11/13/05 09/09/06 07/06/07Date

Bot

tom

s S

(ppm

)

Previous Cycle Current Cycle

Top Bed Changed

ULSD Sulfur Monitoring

Operating Limit

2007 Annual Meeting

0

20

40

60

80

100

120

08/01/02 05/28/03 03/23/04 01/17/05 11/13/05 09/09/06 07/06/07Date

Bot

tom

s S

(ppm

)

Previous Cycle Current Cycle

Top Bed Changed

ULSD Sulfur Monitoring

Operating Limit

2007 Annual Meeting

Conclusions

2007 Annual Meeting

North Atlantic

Criterion/Zeolyst Shell Global Solutions

Essential Teamwork

$3.5 MillionAnnual Benefit

ULSDOptimal yieldsLonger cycle life

2007 Annual Meeting

Conclusions (continued)

• The hydrocracker now serves as a profitability engine, enabling North Atlantic to produce ULSD from lower-cost sour crudes.

2007 Annual Meeting

• Jointly developed solutions and implemented projects include:

Tailored stacked bed catalyst systemNew TX shaped Trilobe catalystInstallation of a filter tray, UFQ interbed internals, and high dispersion HD trays in each reactor

2007 Annual Meeting

Q&A

Russell Anderson Russell Anderson, tiene grado de Doctor en Ing. Química por la Universidad de Drexel, actualmente es uno de los Directivos de Criterion y del grupo Zeolyst Hydrocracking Technical Service. Mr. Anderson tiene más de 8 años de experiencia en las áreas de hidrodesintegración e hidrotratamiento y mas de 16 años de experiencia en procesos de refinación, incluyendo reformación catalítica y FCC. Desde 1990, ha pertenecido a compañias del grupo Shell radicando en Westhollow, Deer Park, y Norco. En 1996, se unió al equipo de trabajo de los servicios técnicos de hidrodesintegración de Criterion and Zeolyst por un periodo de cuatro años previo a su incorporación en la refinería de Deer Park. Russell Anderson currently is one of the Senior Engineers for Criterion and Zeolyst Hydrocracking Technical Service Team. He has over 8 years experience in the areas of hydrocracking and hydrotreating, with over 16 years of experience with refinery processes including catalytic reforming and fluid catalytic cracking. Since 1990, he was employed by a number of Shell Group companies and worked at various Shell locations (Westhollow, Deer Park, and Norco). In 1996, he joined the hydrocracking technical services team working for Criterion and Zeolyst for a period of 4 years prior to an assignment at the Deer Park refinery. He returned to the hydrocracking technical services team in 2004. Russell holds a PhD Degree in Chemical Engineering from Drexel University.