Decarbonisation Technology August 2022 issue

MTPA of CO₂, Sorbead was found to be significantly cheaper than an activated alumina-based system over a 30- year lifetime (see Table 2 ). This study considered estimated turnaround (TAR), Capex and Opex costs, each of which was lower for the aluminosilicate. The stability and longer material lifetime of Sorbead results in fewer TAR days and lower associated costs. Additionally, smaller bed sizes drastically reduce the Capex and Opex costs. Overall, for CO₂ dehydration, smaller bed sizes and

Activated alumina


Number of days down for TAR


25 Days over 30 years

Capex cost Opex energy

14.9 94.2


$ MM $ MM $ MM $ MM


Opex maintenance Total cost over lifetime





Table 2 Cost comparison of activated alumina and Sorbead over a 30-year lifetime for a plant producing 2.5 MTPA CO₂. Opex costs estimated using average energy cost in the US (0.14 $/KWH)

costs are typically 50% lower than activated alumina for the same application. Sorbead is a cost-effective solution that also delivers a low carbon footprint. A lower heat of regeneration, 170°C, allows for elimination of the regeneration heater requirement and utilisation of waste heat for regeneration. This, along with smaller bed sizes, drastically decreases the energy duty of the process. Further, longer bed lifetimes and the adsorbent nature of an advanced aluminosilicate reduces the amount of waste generated. For the CCS market, whose goal is to reduce carbon emissions, the solution with the lowest carbon footprint is the best fit. With many years of experience, BASF is well positioned to design effective dehydration solutions and has demonstrated the proficiency of these designs firsthand. This experience extends into all phases of CCS. This experience, together with the process benefits of a specialty aluminosilicate, make Sorbead a compelling choice for CO₂ dehydration.

increased stability when using an aluminosilicate for CO₂ dehydration result in a 50% reduction in cost when compared to activated alumina. BASF offerings – CO₂ capture, purification, and dehydration In addition to its CO₂ dehydration technology, BASF offers a range of CO₂ capture, purification, and utilisation solutions (see Figure 3 ). One such product, OASE blue, is used in the capture of CO₂ from industrial flue gas streams. This product not only provides a highly stable, low-maintenance solvent solution but also provides a customised technology package. Additionally, BASF has a wide array of purification technologies for the removal of many different impurities, including oxygen, sulphur, halogens, carbon monoxide, and more. Together these technologies cover every stage of CCS projects. Conclusion Sorbead, a specialised aluminosilicate adsorbent, is stable to the acidic conditions found in CCS. This stability allows for the longest adsorbent bed lifetimes, smallest bed sizes, and the lowest Capex and Opex costs when compared to other adsorbent materials. Over a 30-year lifetime,

Peg Greene


CO dehydration

CO storage or transportation

CO capture

Flue gas

Producing plant


O gas

Figure 3 BASF knowledge and technologies are available at every phase of CCS including CO₂ capture, purification, and dehydration. Purification can be implemented in various stages of the process depending on the specific project needs


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