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CO2 Separation Conventional DDR-type zeolite membranes are well suited for separating CO2 from different-sized molecules, such as methane, which is present in associated gas or natural gas. However, such membranes are not very efficient for separating CO2 from O2 or…
Quantifying varnish removal in lubricated systems
In lubricated systems, varnish and deposits can form on metal surfaces as lubricant oils degrade, often leading to inefficient operations and equipment failure. There are many chemical cleaning products to break down varnish, but the effectiveness of these compounds in…
Bifunctional catalyst enables economically viable production of bio-based acrylates
The prospects for a bio-based route to acrylates (diagram) received a significant boost recently, when startup company Låkril Technologies Corp. (Chicago, Ill.; www.lakril.com) licensed technology from the laboratory of Paul Dauenhauer at the University of Minnesota (Minneapolis, Minn.; twin-cities.umn.edu). Dauenhauer…
Commercial production of glucaric acid from sugar substrate
The synthetic biology company Kalion Inc. (Milton, Mass.; www.kalioninc.com) recently completed its first commercial-scale production run of high-purity (98–99%) glucaric acid via fermentation of glucose at a custom-manufacturing facility owned by Evonik Industries AG (Essen, Germany; www.evonik.com). The high purities…
Predicting aluminum-alloy mechanical properties at high temperatures
Aluminum is used for a number of applications because it is lighter than iron and easy to machine. However, Al is usually alloyed with Cu, Mg or other elements for improved strength. Developing such alloys that maintain their strength at…
Bulk polymerization of elemental sulfur yields new flame-retardant plastics
A group of researchers from the University of Arizona (Tucson; www.arizona.edu), led by chemistry and biochemistry professor Jeff Pyun, are aiming to make use of sulfur waste streams from petroleum refineries. To meet environmental regulations, sulfur must be removed from…
Mining REEs from phosphogypsum
Last month, the Pennsylvania State University (Penn State; University Park, Pa.; www.psu.edu), Case Western Reserve University (Cleveland Ohio; www.case.edu) and Clemson University (S.C.; www.clemson.edu) received a $1.7-million National Science Foundation grant for a four-year project to recover rare earth elements…
Recovering REEs from unconventional sources
In October, researchers from Penn State and the Lawrence Livermore National Laboratory (LLNL; Calif.; www.llnl.gov) described — in an article published in ACS Central Science — a new method that improves the extraction and separation of rare earth elements (REEs)…
Waste-based ceramics improve energy-storage economics
Ceramic materials’ high heat resistance makes them a promising media for thermal energy storage, but their high costs have inhibited their widespread use for this application. Now, a new technology offered by Seramic Materials Ltd. (Masdar City, U.A.E.; www.seramic.eco) can…
A new spin on ultrasonic algae control in wastewater-treatment applications
Ultrasound treatment is a non-chemical method to control algae using specific sound frequencies emitted through water to cause internal damage to polluting algae cells. Most previous work in the area of ultrasonic algae control has focused on very loud emitted…