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Cost Reduction for Carbon Capture

Thursday, May 15, 2014

On the 2nd Guangdong International CCUS Conference held on May 15, 2014, the experts shared their thoughts on how to reduce the cost for carbon capture.

Jian Wang and Richard Smith from Howden introduced their cost reduction strategies for carbon capture. Howden’s main products are high integrity fans, heat exchangers and compressors which demand the highest levels of efficiency, reliability and availability. They operate in a wide range of industries that are all carbon dioxide emitters. 49% of Howden’s business is in the power industry, so Howden provides life term solutions with long term value to its customers.

Howden has been active for transitional CCUS, and provided equipment for worldwide CCUS demonstration projects including the Kemper County and Dongguan IGCC projects.

Howden is developing the next generation carbon capture equipment including the swing solid adsorption technology and mechanical recompression technology, aiming at reducing long time energy consumption and cost. Howden will focus on the development of reliable, high efficiency, easy installation and modularized equipment in the future.

Michael Mei from Alstom introduced the White Rose Project. White Rose Project is the largest oxy-combustion CCS commercialization project in the world (426MWe) which located at the Drax Power Plant, Selby, North Yorkshire. This project will realize 90% CO2 capture, equivalent to 2 million tonnes of CO2/year, and the captured CO2 will be permanently stored in a deep saline formation beneath the North Sea.

It is expected that the project will complete FEED/Risk reduction phase by 2015; start commissioning by 2019; and commence full commercial operations in 2012-2023. Alstom is responsible for the development, delivery and integration of the oxy-power plant.

CCS brings investment, jobs and decarbonise UK’s power industry. It is essential to form CCS cluster and realize CCS commercialization.

John Zhang from Shell Cansolv introduced Shell Cansolv regenerable CO2 capture technologies and their application. Shell licenses a patented commercial technology to reduce the SO2 & CO2 emissions from large scale emitters.

Shell Consolv technologies allow reaching very stringent environmental emission standards. They are similar to H2S amine treaters, the process is easy to operate, and their capital and operating costs are lower than non-regenerable technologies.

The projects Shell is operating include 1.2 GW Coal Power Plant, China, Cansolv CO2 Capture Unit at LANXESS CISA and SaskPower BD3 150MW SO2/CO2 Capture.

Lianbo Liu from Huaneng Group Clean Energy Research Institute shared his opinion on potential cost reduction for carbon capture. he said that the cost for carbon capture is expensive because of the steam and energy consumption in the regeneration tower.

The capital cost of carbon capture can be lowered with long-term development, while the operation cost can hardly be reduced under current technical conditions. Therefore, Guangdong should focus more on the development of regeneration technologies. The MBR system can reduce the operation cost significantly by cutting the energy consumption of the system by 15%-20%. Besides, membrane separation technology can avoid steam loss by recycling the steam in the bottom of the regeneration tower.

In the end, Hyungwoong Ahn from University of Edinburgh, School of Engineering introduced improved industrial hydrogen plant with CO2 capture. The independent IGCC simulation has been developed by the university to evaluate the NGCT technology. It confirmed the quantative performance gains of new processes over the existing Selexol unit (+1.8% in net power efficiency at 95% capture). The H2 recovery of the H2 PSA in the H2 plant with carbon capture is 4% higher than those at conventional SMR H2 plants without carbon capture. And the power consumptions at the carbon capture unit and the CO2 compression unit are also reduced.

H2 CCS is the most promising option for CO2 capture at refineries; H2 CCS involves energy penalty but can improve the H2 PSA performance; efficient use of the H2 PSA tail gas can reduce the energy consumption and improve H2 yield simultaneously. And additional cost for implementing it will be marginal (only piping); the proposed process can be applied to gas-fed H2 plants (e.g. SMR H2 plant) as well as coal-fed H2 plants. (Linkschina)

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