Latest News: Technologies
Hybrid 3-D-printing process optimizes performance, cost for aerospace parts
Alcoa Inc. (Pittsburgh, Pa.; www.alcoa.com) has developed a hybrid technique, called Ampliforge (diagram), that combines additive manufacturing (3-D printing) and advanced forging techniques to improve the performance and reduce the cost of metal aerospace components. The company has produced prototype…
This electrochemical cell sequesters CO2 and generates electricity
Researchers from Cornell University (Ithaca, N.Y.; www.cornell.edu) have developed an oxygen-assisted, Al/CO2 electrochemical cell that converts CO2 into a useful product while producing electricity. This represents a possible paradigm shift from most current carbon-capture models, says Lynden Archer, the James…
Chementator Briefs
Modified yeast Researchers at the Joint BioEnergy Institute (JBEI; Emeryville, Calif.; www.jbei.org) have developed a genetically engineered strain of Saccharomyces cerevisiae that is capable of utilizing both glucose (a six-carbon sugar), and xylose (a five-carbon sugar) when presented with plant…
CO2-free ethanol production from lignocellulose
The research group of professor Shiro Saka at the Dept. of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University (Kyoto, Japan; www.ecs.energy.kyoto-u.ac.jp) has developed a new process that efficiently produces bioethanol from non-edible lignocellulose resources, without generating carbon…
Highly selective rare-earth separation using bacteria filters
Mixtures of rare-earth metals (REMs) are notoriously difficult to separate, but a team of researchers from Harvard University (Cambridge, Ma.; www.seas.harvard.edu) has developed a method for efficiently extracting REMs with a high level of selectivity. By taking advantage of the…
This paper has antibacterial activity
The main mineral component of our bones and teeth — hydroxyapatite [HAP; Ca10(OH)2(PO4)6] — has been used by a Chinese team to develop a highly flexible paper with high antibacterial activity. The paper, made from silver nanoparticle-decorated ultra-long HAP nanowires…
Pilot trials completed for a new substitute-natural-gas process
Last month, Clariant AG (Muttenz, Switzerland; www.clariant.com) said that the pilot plant of a new process for making substitute natural gas (SNG) has been successfully tested, signifying that the technology is ready for commercial application. The process, called Vesta Once-through…
Dow validates recyclable polyethylene packaging that performs as barrier
The Dow Chemical Co. (Midland, Mich.; www.dow.com) recently announced that it has completed validation of a new plastic film technology that can be recycled in existing processes for flexible polyethylene (PE) packaging, but that also performs well as an oxygen…
Converting PE waste into liquid fuels and waxes
Each year, a large amount of plastic waste is generated, with 60% of the total plastic content of municipal solid waste composed of high-, low- and linear-low density polyethylene (HDPE, LDPE and LLDPE) and polypropylene (PP). Existing methods for degrading…
H2S scrubbing process regenerates reagent, produces sulfur
An innovative H2S-scrubbing process employs iron particles to catalyze reactions that convert H2S to elemental sulfur. The new approach improves upon traditional H2S-scrubbing processes that constantly consume reagents (like NaOH and bleach) and generate sulfate-laden wastewater that must be treated.…