Despite the rapid growth in alternative energy sources utilization, combustion technologies will still play a major role in the years to come. Indeed the energy mix of the next decades will see a coexistence of wind and solar sources and of combustion of e-fuels produced from electricity excess, or bio-fuels produced from non-edible biomass conversion. Combustion processes are almost ubiquitous in modern society through power generation systems, transportation engines, industrial and domestic heating applications. Nevertheless, combustion also represents the major source of atmospheric pollution, and new or improved low-emission/low-carbon technologies are continuously sought by scientists and industry players. To achieve this goal, considerable multidisciplinary experimental, theoretical and modelling efforts are necessary to improve the understanding of the physics and chemistry of flames, paving the way for sustainable solutions in terms of greenhouse gases and pollutant emissions reduction, aiming for a net-zero carbon balance.

The purpose of this Research Topic is to present new results, findings and developments in the various disciplines associated with combustion science and pollutants formation and destruction. The Editors invite original contributions dealing with experimental investigations of flames, novel experimental diagnostics, chemical kinetics, 0-D and 1-D reacting flows simulations, thermochemistry, pollutants formation measurements and mechanisms (NOx, SOx, non-regulated pollutants, particulate matter), novel fuels, hydrogen and natural gas combustion, data-driven methods for chemical kinetics development and investigations. Authors, who virtually attended the European Combustion Meeting 2021 to be held in Naples (Italy), are encouraged to contribute through the submission of a full-paper research article.

Original research articles including, but not limited to, the following areas of interest are welcome:
• Development and validation of reaction kinetic mechanisms;
• Advances in combustion diagnostics;
• Laminar and turbulent flame measurements and simulations;
• Formation and control of pollutants and greenhouse gases;
• Soot, nanoparticles, PAH and other large molecules;
• Novel concepts, fuels, technologies and systems;
• Machine Learning and Artificial Neural Network applications to combustion kinetic models development.

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