Photocatalytic reduction of CO2 into a fuel is an attractive way to reduce CO2 emissions into the atmosphere, and there are many projects underway around the world to find ways of converting CO2 into chemicals, such as H2, CH4, ethanol,…
High-surface-area beads filled with microbes are being used to reduce biosolids in wastewater. In one case, Drylet LLC (San Francisco, Calif.; www.drylet.com) has developed engineered porous particles that provide large surface areas (the equivalent of 12 football fields of surface…
A biodiesel fuel blend known as B20 contains oils derived from waste coffee grounds, and will be used to power mass transit buses in London. The fuel is made through a partnership among bio-bean ltd. (London, U.K.; www.bio-bean.com), which has…
Foam dyeing, a new technology for dyeing cotton yarn that is being applied to denim production for the first time, eliminates the use of several chemicals and can reduce water use by up to 90% compared to traditional dyeing. The…
A new collaboration between PPG (Pittsburgh, Pa.; www.ppg.com), SiNode Systems (Chicago, Ill.; www.sinodesystems.com) and Raymor Industries (Boirsbriand, Que., Canada; www.raymor.com) aims to accelerate commercialization for battery anodes made of a silicon-graphene composite. “These materials can achieve significantly higher capacities than…
3-D Printing At the 3-D printing tradeshow Formnext in November, GE Additive (Paris, France; www.ge.com) unveiled a laser-powder additive manufacturing machine with a 1-m3 build envelope. The machine, said to be the world’s largest laser-powder system, will be used to…
A counter-rotating propeller technology that is being developed to harness the energy from tidal currents has been field tested off the coast of Nagasaki Bay, near Iwo Jima, Japan. The prototype, which is one seventh the size of a commercial…
H2SO4 Catalyst BASF SE (Ludwigshafen, Germany; www.basf.com) has introduced a new catalyst for making sulfuric acid. The cesium-based O4-115 Quattro catalyst has a unique geometrical shape — a combination of four strands — leading to a 30% greater catalytic surface…
In boilers, silicates can volatilize with the generated steam and then form silicate glass on turbine blades, causing an imbalance. Therefore, the concentration of silicates in boiler circuits must be reduced to below 0.5 parts per million (ppm). The conventional…
A new adsorption-based technology can separate ozone from oxygen in O3-generating systems, allowing recycling of unreacted O2. In corona-discharge O3 generation, O2 molecules are split by passage through an electric field to create free oxygen atoms, which quickly combine with…