Case study Advanced Plant Control. The production of syngas and ammonia (NH3) in the same plant offers operators certain synergy effects. Polygeneration creates not only economies of scale but also increases operational flexibility. Klemens Wawrzinek, Fernando Rivera Nitrogen + Syngas 2018 February 28, 2018, Gothenburg, Sweden Short version

1. Linde Jubail – Polygeneration of Ammonia & Industrial Gases.
Case study Advanced Plant Control.
Klemens Wawrzinek, Fernando Rivera
Nitrogen + Syngas 2018
February 28, 2018, Gothenburg, Sweden
Short version

2. 2
Natural
Gas
H2, CO, and Ammonia polygeneration technology & product balancing.
H2
Pressure
Swing
Adsorption
CO2 removal
CO
CO coldbox
Steam
reforming
Fuel gas network
NH3
Ammonia
synthesis
CO2
CO2 recycle
NH3 tank
CO2 recycle balances the H2 to CO product ratio Product firing balances short term H2, CO demand dips
NH3 tank balances mid term H2 demand changesSteam reformer load balances long term product demand
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version
Polygeneration of CO, H2, and ammonia is a perfect match for the inert free Linde Ammonia Concept
N2

3. 3
Max. reformer load
CO firing
H2 firing
Max. coldbox
load
Min. reformer load
0%
20%
40%
60%
80%
100%
0% 20% 40% 60% 80% 100% 120%
High product flexibility of a polygeneration plant.
The “Pavellogramme.
CO2 recycle balances
the H2 to CO product
ratio
Product firing
balances short term
H2, CO demand dips
NH3 tank balances
mid term H2 demand
changes
Steam reformer load
balances long term
product demand
H2productload
CO product load
Efficient operating point should be reached as fast as possible
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

4. 4
Intensive data collection during start-up period
0%
20%
40%
60%
80%
100%
0% 20% 40% 60% 80% 100% 120%
Limits of process envelope
Grid points of process
Firing Limits
H2productload
CO product load
– First product on spec
– Major points are manually
adjusted by commissioning
team & operators
Collected data span grid over “Pavellogramme” as input for Advanced Process Control
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

5. 5
The Sadara polygeneration plant product flexibility.
Visualization in Control System
Product flow rate targets are
simply entered in the Distributed
Control System (DCS)
Linde Advanced Process Control
ramps automatically two HyCO
trains + NH3 plant through the
operational field
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

6. 6
Visualization of ramping through “Pavellogramme” in DCS
Ramp start:
Lowest load ~ 40%, no CO2 recycle
Ramp Finish:
~85 % load full CO2 recycle
Ramping period:
Plant follows ramp target
Final target
Ramp target
Actual products
Linde Advanced Process Control ramps automatically through the operational field
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

7. 7
Advanced Process Control for Polygeneration.
Summary
• Polygeneration of ammonia and industrial gases is perfect fit for the Linde Ammonia Concept
• Process is efficient, reliable and increases flexibility, operated by Linde Gas
• Polygeneration plants require tailor made process design and sophisticated control system
• With Linde´s Advanced Process Control tuned during commissioning fast ramp rates are possible
leading to more efficient plant operation
• Automatic ramping with experienced supervision is optimum operational set-up
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

8. 8
The Sadara polygeneration plant.
Real view of 2 Train HyCo + NH3-plant
K. Wawrzinek, Linde Engineering, Nitrogen + Syngas 2018, Gothenburg, Sweden; short version

9. Thanks for your attention.
Collaborate. Innovate. Deliver.
Linde Engineering Division
Klemens Wawrzinek
Tel +49 89 7445 4203
klemens.wawrzinek@linde.com