Some potential sites for carbon capture are constrained by access, being located away from ports or other deep-water access. The one-piece absorber column design in Bechtel’s standard 1 million ton per year carbon capture plant design is over 65m high and 16.7m in diameter; to fabricate and test the one-piece absorber column in a low-cost location and then transport to an inland site would be challenging or impossible.
Bechtel has developed an alternative concept for an absorber column that can be assembled or fabricated on site to mitigate such logistics issues.
A range of construction methods were evaluated against criteria such as material cost, fabrication cost, ease of transport and ease of construction. Both circular and rectangular column geometries were evaluated, along with metallic and concrete materials with liners. A best technology selection report was produced with a range of disciplines, covering the various engineering, procurement and construction factors.
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