Chementator
A world-first process for recycling aluminum-smelter waste to be piloted in Tasmania
Aluminum smelting operations require molten cryolite, also commonly called bath, to serve as the electrolyte and dissolve alumina. A typical smelter produces excess bath over time, and there are few markets for reuse or recycle of this material, especially as…
Enzyme engineering breaks out of the cell
A new approach to enzyme engineering has overcome many of the operating challenges associated with large-scale bio-based manufacturing processes by designing enzymes that can thrive outside living cells, eliminating complexity and improving reaction yields. eXoZymes’ (Monrovia, Calif.; www.exozymes.com) cell-free enzyme…
Nanofibers dramatically increase catalytic activity for ultra-low-iridium electrolysis
Decreasing the dependence on expensive platinum-group metals like iridium is vital for the expansion of “green” hydrogen production via proton-exchange membrane (PEM) water electrolysis. Efforts to develop lower-iridium catalytic components for electrolysis have typically focused on mixing iridium into a…
Substituting cobalt in high-strength alloys
A team of scientists at Pacific Northwest National Laboratory (PNNL; Richland, Wash.; www.pnnl.gov) recently unveiled a modified version of the “superalloy” Inconel 617, in which cobalt — a component of the alloy that is also a critical material with significant…
Nanofiltration approach recovers aluminum from process waste
The industrial production of aluminum involves electrolysis of alumina (Al2O3) in molten cryolite, a mineral used as a solvent for the aluminum oxide raw material. Over time, the cryolite accumulates impurities, such as sodium, lithium and potassium ions, which degrade…
Aerogel insulation
A pilot plant intended to manufacture silica aerogel products for different applications, including spray insulation, is being planned by the company Aeroskin Tech AG (Zurich, Switzerland; www.aeroskintech.com). Aerogels are dried gels that maintain their volume when dried, and have nanoscale…
Expanded database tool for olivine samples
Olivine, a magnesium-iron silicate mineral, is common in the earth’s subsurface, and can sometimes contain other valuable elements, such as cobalt, manganese and nickel. Olivine has been explored as a possible sink for atmospheric carbon dioxide in carbon-capture methods that…
Algae-based wastewater treatment with lower energy consumption
Algae show promise for removing nutrients like phosphorus and nitrogen from wastewater due to their natural absorption abilities. However, the widespread use of algae-based wastewater treatment is limited by challenges related to system footprint, mass transfer and maintaining optimal conditions…
Recycling fiber-reinforced polymers with oxygen-free static thermolysis
A new thermolysis technology developed by Composite Recycling (Ecublens, Switzerland; www.composite-recycling.ch) breaks down fiber-reinforced polymers (FRPs) into their fundamental constituents, enabling reuse as valuable feedstock for the creation of new composite materials. “Past efforts to recycle composites have allowed waste…
New screening method reveals microbial enzymes for breaking down PET
Breaking down polyethylene terephthalate (PET) into its constituent monomers under mild conditions is a key goal of plastics recycling. Knowledge of how many naturally occurring enzymes are capable of breaking down PET, and which would be most effective in industrial…