ClearFlame Engine Technologies has raised $30 million in Series B funding to bring to market innovative solutions that power heavy-duty engines with clean, renewable fuels and create a viable business solution to reduce carbon and soot.

The latest investments were led by Mercuria Energy Group, one of the world's largest privately held energy and commodities companies, with Mercuria and Breakthrough Energy Ventures both making second investments. New investors, including mining corporation Rio Tinto, and WIND Ventures, the strategic venture arm of Copec, one of Latin America's leading mobility and energy companies, see ClearFlame as part of a holistic suite of strategies to advance environmental, social and governance (ESG) goals.

The ClearFlame technology enables heavy-duty engine manufacturers to produce engines at lower cost, while simultaneously providing their customers with higher performance and fuel cost savings.