The Technology Collaboration Program (TCP) on Sustainable Combustion held its 46^th Task Leaders Meeting (TLM) in Chicago, Illinois, USA on August 4-8, 2024. TLM provides a unique opportunity for the leaders of the Combustion TCP collaborative tasks to bring all the task participants together for detailed technical exchanges, as well as programmatic coordination.  Ten separate TCP tasks reported at the meeting: Systems Analysis, Policy Briefs for Hydrogen and Its Vector Fuels, net-Zero Carbon Engine Technologies, Gas Engines, Gas Turbines, Fuel Injection Processes, Soot, Solid Fuel Combustion, Combustion Chemistry, and Exhaust Aftertreatment Treatment Systems. More than 45 researchers, program managers, and industry representatives attended from all 12 countries participating in the TLM, plus other countries. 

     Brief overview presentations were given by each Task Leader.  These were followed by detailed technical presentations from task participants. The technical content of the meeting was on the new focus of the TCP on internal combustion engines for hard-to-electrify sectors of transportation and power generation and on utilization of sustainable, non-fossil fuels in these sectors.  An invited presentation by Micheal Wang of Argonne National Laboratory provided a summary of the status of the widely used GREET systems analysis modeling tool and results.   Overall, the meeting provided significant interaction and discussion among the TLM participants and others attending.

     The TLM was organized by Gurpreet Singh (the TCP Chair and US delegate) of the US DOE and Paul Miles (a US delegate) of Sandia National Laboratories. The 47^th TLM will be held in June 22-26, 2025, in Ischia, Italy.