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NREL Researchers Pave the Way for Carbon-Negative Concrete (www.nrel.gov)

submitted 3 months ago by [email protected] to c/[email protected]

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[–] [email protected] 40 points 3 months ago* (last edited 3 months ago) (2 children)

Carbon-negative is a long stretch, it's just using waste material that is usually used as fuel. It's at best low-carbon compared to concrete, which honestly is already a good thing.

At around the same time, Meyer learned about the large amount of waste lignin that is produced every year, primarily from pulp and paper processes, which is also expected to be produced from biorefineries in the future.

[...] During the production of pulp and paper products, roughly 100 million tons of lignin are produced annually as a waste byproduct and subsequently burned as low-value fuel.

Meyer saw lignin as a polymer that could be used as a material instead of a fuel and sought to crosslink it like an epoxy resin. Using lignin allowed Meyer to sequester CO2 captured from the air in the form of biomass that would otherwise be burned.

(Emphasis mine)

[–] [email protected] 10 points 3 months ago

Thanks, headline sounded like bullshit, but this makes sense.

[–] [email protected] 5 points 3 months ago (1 children)

Little steps in the right direction I guess.

[–] [email protected] 5 points 3 months ago (1 children)

Oh yes, if it ends up replacing concrete that would definitely be a win. It never was my intention to dunk on the invention, I just felt that the title was misleading and had an urge to correct it.

[–] [email protected] 2 points 3 months ago

Same here. Every bit counts. And the bio polymer idea sounds interesting.