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Technology Innovation to Accelerate Energy Transitions

Annex B

CCUS in power

Innovation, in combination with targeted policy measures for deployment, is crucially needed to stimulate CCUS development and bring it into line with the SDS.

Innovation for CCUS in power generation needs to target cost reductions, improve the efficiency of CO2 capture, and expand the portfolio of available CCUS technologies. Approaches like supercritical CO2power cycles have gained public attention recently for their potential of lowering cost and high capture rates.

Reduce the energy penalty and cost of CCUS capture

Reducing the energy penalty of capture plants will reduce the cost of capture technology, one of the main barriers to widespread CCUS deployment today.

As the theoretical separation energy for capture is generally very low compared to the requirements of today's typical systems, in particular for post-combustion plants, opportunities for significant cost reductions exist.

Demonstrating supercritical CO2 power cycles at scale

Supercritical CO2 power cycles (sCO2) in principle allow for, in addition to higher plant efficiencies compared with conventional pulverised coal plants, lower pollutant emissions, higher power density (which could reduce capex) and easier CO2 capture. In some cases they could also allow for reduced water consumption. Plant sizes, which can vary from 1 MWe to 600 MWe, could be adjusted to specific electricity demand requirements.

CCUS applied to gas-fired power generation at scale

Applying CCUS to gas-fired power plants can substantially reduce the emissions of the gas-fired fleet. While there are no large-scale CCUS projects at gas-fired plants in operation today, the SDS envisions 35 GW by 2030.

Natural gas-fired power

Improving flexibility and increasing fulland part-load efficiency will continue to be research priorities for gas-fired power generation.

Generator flexibility is particularly important to integrate growing shares of variable renewables into the grid. Boosting flexibility and encouraging its use requires that power plant technology be improved, as well as system operations, market design, the granularity of pricing and access to revenue streams for system services.

With ample, affordable gas becoming available in certain regions and countries (for instance the United States), full-load efficiency remains an important plant parameter.

RD&D should also be directed towards CCUS for gas-fired power generation. Like unabated coal, unabated gas is likely to be too carbon-intensive to reach ambitious climate targets beyond 2040.

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