Carbon storage versus carbon utilisation

While covering all aspects and technologies of the CCUS value chain, a new report by IDTechEx titled 'Carbon Capture, Utilisation, and Storage (CCUS) Markets 2025-2045: Technologies, Market Forecasts, and Players' has interestingly noted how policymakers and key industrial players are focusing more on carbon dioxide storage, increasingly dropping the 'U' (utilisation) from discussions at conferences and expos

The report has found that by 2045, the world will be sequestering 1.6 gigatonnes per annum of CO2 underground, as dedicated geological storage of carbon dioxide will outpace enhanced oil recovery as the end result for CO2 capture. Major oil and gas players such as Shell, Equinor, and Chevron are leveraging decades of subsurface expertise to open-up storage in saline aquifers.

Permanently storing carbon dioxide generally has better sustainability credentials than utilising CO2. This is because permanently sequestering CO2 captured from an industrial process in dedicated underground storage is a net-zero process (or even net-negative for some CO2 sources). In contrast, captured CO2 returns to the atmosphere on short time scales for several CO2 utilisation applications, such as when a fuel synthesised from CO2 is combusted. Storing CO2 is therefore better suited to meeting emission reduction targets.

For industry stakeholders from the African energy market, CCS will be vital in attracting energy investments and eradicating energy poverty from the continent.

Decarbonising oil & gas assets

Fossil fuel infrastructure won’t disappear overnight, but existing assets can be decarbonised. New CCUS enhanced oil recovery projects are still expected in the future because the oil produced by this method has a much lower carbon footprint than typical oil extraction. Alternatively, drop-in replacements to fossil fuels can be made by utilising CO2, such as CO2-derived e-fuels. Such low-carbon fuels are seeing demand from the aviation and maritime sectors, where full electrification remains unfeasible for decarbonisation.

In the Middle East and North Africa (MENA) region, the Habshan Carbon Capture, Utilisation and Storage project is one of the largest carbon capture projects that will have the capacity to capture and permanently store 1.5 mn tonnes per annum (mtpa) of carbon dioxide (CO₂) within geological formations deep underground.