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Siemens PostCap™ Technology
CO2 Post Combustion Capture
For combined cycle and steam power plant applications
Answers for energy.
Power Generation from fossil fuels
will still account for the major share
of the energy mix in the next decades.
Siemens developed the PostCap™
CO2 capture technology to reduce
the CO2 footprint of coal- and gasfired power plants.
PostCap™ has been successfully
validated in its pilot plant located
at E.ON’s coal-fired power station
Staudinger, Germany and it is now
ready for large-scale application.
Benefits
• Environmentally friendly amino acid
salt solvent
• Good solvent stability against
degradation (particularly oxygen)
• Minimal detectable solvent emissions
in cleaned flue gas
• Low energy consumption by enhanced
process configuration
• Smart two-step reclaiming system
with very limited solvent losses
• Ease of handling by power plant
operators and personnel
PostCap™ Pilot Plant
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Siemens in-house competencies
for power plants with CO2 Capture
Siemens provides technology along the whole process chain from power generation to CO2 scrubbing
as well as CO2 compression. Therefore, Siemens is an ideal partner for the implementation of
power plant solutions with CCS.
Power Plants
Siemens as a manufacturer of gas and steam turbines
has broad expertise in the design, construction and
delivery of power plant solutions up to the delivery
of turnkey plants. Its portfolio ranges from small to
large-scale applications in the industry and power sector.
Chemical Process Development
Siemens is experienced in the development and optimization of chemical processes. Comprehensive chemical
databases, forefront process simulation and design tools
are available. Own in-house laboratories and the PostCap™
pilot plant contributes to the development of CO2 Capture
technology.
Engineering Capabilities
For the development, commercialization and implementation of Siemens PostCap™ powerful in-house capacities
are available, such as:
••Project Management
••Chemical and Power Plant Engineering
••Project Site Execution
••HSE and Quality Management
Other CO2 Capture Related Equipment
Further products and solutions along the entire
CCS chain can be offered, e.g.:
••CO2 compressor solutions
••Drives and electrical equipment
••Automation equipment and solutions
for transport and injection
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The Siemens PostCap™ process
PostCap™ is based on absorption-desorption principle and uses an amino acid salt (AAS) solvent.
At least 90% of the CO2 from flue gas of power plants can be separated.
Absorption Process: Flue gas enters the
absorber and is counter-currently treated
with solvent to capture the CO2. On top of
the absorber cleaned flue gas is released.
Due to very low volatility of the AAS no
washing unit on top of the absorber is
required.
Cleaned flue gas with
near-zero solvent slip
Sellable sulfur
product
CO2-Treatment: The CO2 is dried and
compressed before it is transferred for
use or storage.
Siemens proprietary 2-step
reclaimer
Residue
Desorber
top condenser
Lean
solvent
CO2 stream
purity > 99%
Lean
solvent
cooler
Absorber for
CO2 scrubbing
Flue gas
blower
Flue gas
cooler
Siemens CO2
compression solutions
Desorber for solvent
regeneration
Reboiler
Heat exchanger
lean/rich solvent
Low pressure steam
from Power plant
Rich solvent
Flue gas
from power plant
Flue Gas System: The flue gas
to be cleaned is cooled and fed
by a blower into the absorber.
Desorption Process: CO2-rich solvent is taken from the absorber, heated and fed into
the desorber. There, CO2 is desorbed from solvent by heat introduction and released
on top of the desorber. CO2 lean solvent is cooled and redirected to the absorber.
PostCap™ Reclaiming
Technology
Flue gas trace compounds lead to solvent contamination. Reclaiming of solvent
is required to maintain process performance and minimize solvent losses.
Siemens applies a two-step
reclaiming process:
• Full recovery of SOx contaminated
solvent and generation of a marketable
sulfur product
• Highly selective separation of AAS
solvent from degradation products
• Independent operation of each
reclaiming step
• Continuous- or batch-operation possible
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PostCap™ References
Siemens executed several engineering studies based on the experience from
pilot plant operation and its knowledge in chemical and power plant engineering.
Below a selection of references is provided:
Project
Carbon Capture Mongstad
Location
Mongstad Refinery, Norway
Customer
Statoil + Gassnova
Size
1.2 Mio. tons of CO2 per year
Scope
Concept study within the framework of
the Technology Qualification Program
Project
Masdar FEED
Location
Abu Dhabi, UAE
Customer
Masdar
Size
1.8 Mio. tons of CO2 per year
Scope
Front End Engineering Design (FEED)
study
Project
Statkraft CCS Study
Location
Norway
Customer
Statkraft
Size
1.2 Mio. tons of CO2 per year
Scope
Front End Engineering Design (FEED)
study
Project
ROAD Project
Location
Netherlands
Customer
E.ON, GDF Suez
Size
1.1 Mio. tons of CO2 per year
Scope
Feasibility study
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Published by and copyright © 2014:
Siemens AG
Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens Energy Inc.
4400 Alafaya Trail
Orlando, FL 32826-2399,
USA
For more information, contact our
Customer Support Center.
Phone:+49 180/524 70 00
Fax: +49 180/524 24 71
(Charges depending on provider)
E-mail:support.energy@siemens.com
Power Generation Division
Order No. E50001-D100-A192-X-7600 | Printed in Germany |
Dispo 05400 |
TH 214-131227 | 433740 | WS | 05142.0
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The information in this document contains general
descriptions of the technical options available, which
may not apply in all cases. The required technical
options should therefore be specified in the contract.