| Turbine technology Integrating CCUS with CCGT
The integration of carbon capture and storage with combined cycle technology is attracting increasing attention, not least in the UK and the USA
In the UK, the Net Zero Teesside Power (NZT Power) project – a joint venture between bp and Equinor, with bp leading as operator – has the potential to become one of the world’s first integrated CCGT+CCUS facilities. It is “expected to provide flexible, dispatchable low carbon electricity to complement the growing deployment of intermittent forms of renewable energy such as wind and solar.” In mid-December, the project’s developers awarded FEED (front end engineering design) contracts to two separate consortia of engineering companies, carbon capture technology providers, and EPC contractors, the idea being to instigate a competition between the two consortia. The two selected contractor groups are:
● Technip Energies and General Electric consortium: led by Technip Energies and including Shell as a subcontractor for the provision of its Cansolv CO2
capture
technology and Balfour Beatty as the nominated construction partner.
● Aker Solutions, Doosan Babcock and Siemens Energy consortium: led by Aker Solutions and including Aker Carbon Capture
as a subcontractor for the provision of its CO2 capture technology.
The idea is that the two consortia will now work on design and development plans for NZT Power’s proposed “up to 860 MW” combined cycle power station with carbon capture plant and each deliver a “comprehensive” FEED package, “led from their UK offices”, within 12 months. Following the completion of the FEED process, the two consortia will “then submit EPC (engineering, procurement and construction) proposals for the execution phase.” Then “as part of the final investment decision expected in 2023, a single consortium will be selected to take the project forward into construction.” The awards are said to “represent an important next step towards the proposed
development of the UK’s first full-scale integrated power and carbon capture project.” The contracts also include FEED for the planned facilities that will gather and compress CO2
from NZT Power and other regional sources and export it offshore for permanent sub-surface storage. These facilities will also take CO2
captured
from a range of projects in the Humber region. This common infrastructure for carbon dioxide transport and disposal in the Endurance aquifer in the southern North Sea is to be provided by an entity called the Northern Endurance Partnership (NEP), a joint venture between bp (leading as operator), Equinor, National Grid Ventures, Shell and TotalEnergies.
The proposed NZT Power facility is in the Teesside part of the NEP-led East Coast Cluster (which encompasses both the Teesside and Humber regions). In October 2021, the East Coast Cluster was named as one of the first two clusters to be taken forward as part of the UK government’s carbon capture and storage “cluster sequencing process” (the other being the HyNet Cluster in the north west of England). In January 2022, NZT Power submitted a bid into Phase-2 of the cluster sequencing process, with the UK government expected to announce a shortlist of successful projects around May 2022. If successful, NZT Power would be “eligible for government business model support and further investment will be unlocked.”
NZT Power has also entered into a partnership with Durham-based NOF, a UK “national energy sector business development organisation”, to support the project “on supply chain engagement.”
A DCO (Development Consent Order) application for the NZT Power project was submitted to the UK Planning Inspectorate in 2021. It was formerly the Clean Gas Project, initiated by the now defunct UK Energy Technologies Institute, and subsequently passed
to OGCI Climate Investments and then to the current development partnership.
US DoE awards
Carbon capture from natural gas fuelled combined cycle plants was a predominant theme of a recent group of awards announced by the US Department of Energy for 12 projects (totalling $45 million) to “advance point-source carbon capture and storage technologies that can capture at least 95% of carbon dioxide.” Eight of the 12 projects are addressing carbon capture at natural gas fuelled combined cycle plants. Among these eight is a GE-led FEED study focused on GE 7F.04 based combined cycle plants operating at Southern Company subsidiary Alabama Power’s James M. Barry power plant. The Barry site has two 2-on-1 combined cycle plants in operation, each equipped with two 7F.04 gas turbines plus a steam turbine. The GE-led Barry FEED study, “Retrofittable advanced combined cycle integration for flexible decarbonized generation”, will receive $5 771 670 in federal funding following successful completion of the award negotiation phase. The funding has a goal of supporting commercial deployment by 2030.
GE Gas Power will work with Southern Company, Linde, BASF, and Kiewit to develop a detailed plan for integrating carbon capture with natural gas fuelled combined cycle technology. GE will research advanced technology and control concepts to integrate combined cycle technology with Linde’s Gen 2 carbon capture solution, which is based on BASF OASE blue technology. The project will also include gas and steam turbine equipment enhancements to improve the carbon capture process, with a goal of reducing the impact of the carbon capture process on the power plant’s output, performance, and equipment cost. The retrofittable capture technology will be
Above: Visualisation of the NZT Power CCGT+CCUS plant
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