siemens.com/energy 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 2 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 3 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 4 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 5 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:[email protected] Power Generation Division Order No. E50001-D100-A192-X-7600 | Printed in Germany | Dispo 05400 | TH 214-131227 | 433740 | WS | 05142.0 Find out more about PostCap™ Printed on elementary chlorine-free bleached paper. All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. Subject to change without prior notice. 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.