The US Department of Energy (DOE) has announced $50 million (£38.8m) of funding to improve coal-fired energy systems.
The DOE has previously supported innovations in the area and some are now ready to proceed to the large scale pilot stage of development.
It says applicants to the new funding should have already demonstrated technical success at a small scale pilot stage and a 20% financial input is required.
The process will involve three phases – the first stage will assess feasibility, secure team commitments and funds, estimate cost and draw up a schedule.
The second design phase will complete an engineering design study and the third phase will support construction and operation of two final facilities.
Earlier this year President Donald Trump overturned a law preventing coal waste from being dumped in streams and rivers.