A new way to make steel could cut 5% of CO2 emissions at a stroke

Typography

A lumpy disc of dark-gray steel covers a bench in the lab space of Boston Metal, an MIT spinout located a half-hour north of its namesake city.

A lumpy disc of dark-gray steel covers a bench in the lab space of Boston Metal, an MIT spinout located a half-hour north of its namesake city.

It’s the company’s first batch of the high-strength alloy, created using a novel approach to metal processing. Instead of the blast furnace employed in steelmaking for centuries, Boston Metal has developed something closer to a battery. Specifically, it’s what’s known as an electrolytic cell, which uses electricity—rather than carbon—to process raw iron ore.

If the technology works at scale as cheaply as the founders hope, it could offer a clear path to cutting greenhouse-gas emissions from one of the hardest-to-clean sectors of the global economy, and the single biggest industrial source of climate pollution.

Read more at MIT Technology Review

Image: Molten metal flows out of one of Boston Metal's cells, in this composite image.  COURTESY OF BOSTON METAL