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Carbon-neutral calcium carbonate process uses emissions from steel-making plant

Construction is imminent for a carbon-capture project aimed at reducing CO2 emissions from steel production while producing carbon-neutral calcium carbonate. At the U.S. Steel (Pittsburgh, Pa.; www.ussteel.com) manufacturing facility in Gary, Ind., a carbon-capture system designed by CarbonFree (San Antonio,…

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Creating ultrathin gold films with the largest continuous area

Thin gold films offer a broad range of benefits for electronics due to their high electrical conductivity and transparency. Current manufacturing methods are unable to achieve gold films thinner than 10 nm, and are also limited in the area and…

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Flow chemistry yields a more sustainable route to isocyanates

The wide range of performance properties of polyurethane foams makes them essential in many consumer goods. Thus, there is much effort going into creating a more environmentally friendly production process for polyurethane’s main building blocks, polyols and isocyanates. While much…

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Pilot project planned for thermocatalytic ethanol-to-butene process

In December 2024, the Pacific Northwest National Laboratory (PNNL; Richland, Wash.; www.pnnl.gov) announced a three-year collaborative project with vehicle-tire manufacturer Bridgestone (Tokyo, Japan; www.bridgestone.com) to scale up a thermocatalytic process for converting renewably derived ethanol to n-butene. Conventionally, n-butene is…

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Single-step process for electrified ethylene production

Developing sustainable pathways to ethylene — among the world’s most widely used chemicals — is a key element in decarbonizing the process industries. A new electrolysis technology developed by CERT Systems (Toronto, Ont., Canada; www.co2cert.com) can produce ethylene from CO2…

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Desalination advances with new photothermal evaporator

Water scarcity is a growing global concern that is driving increasing efforts to conserve, re-use and treat water. Desalination of seawater is a known technology to combat water shortages, but it is an energy-intensive process. Solar-powered evaporation can be a…

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Powerful permanent magnets — without the rare-earth elements

Permanent magnets — materials that create their own persistent magnetic field — are frequently used in most types of electronics, turbines, engines and motors. Currently, nearly all powerful permanent magnets require rare-earth elements (REEs), such as neodymium or samarium. A…

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Oxygen-free slow pyrolysis boosts bio-waste utilization

Biogenic materials, including agricultural residue or other organic waste, hold a considerable amount of energy density in the form of carbon and hydrogen, but efficiently processing these solid materials to harvest energy can pose challenges. The Modular Conversion TechnologyTM (MCT)…

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Faster kinetics for PFAS removal using existing infrastructure

A next-generation absorbent material with a high affinity for short- and long-chain per- and polyfluoroalkyl substances (PFAS) has recently been granted a patent in the U.S. Developed by Puraffinity Ltd. (London, U.K.; www.puraffinity.com), the material is bottom-up-designed, beginning with a…

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Confined-channel membrane architecture allows simultaneous oil and water recovery

Surfactants can stabilize oil and water in an emulsion, a useful mechanism in many industrial processes and in cleaning up oil spills. But separating and recovering the oil and water, such as for eliminating waste discharge, can be difficult. A…