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Recharge Wrap-up: Ferrock a carbon-negative cement substitute, Audi makes e-diesel

A cement alternative uses recycled materials and traps CO2 rather than producing it. Invented by David Stone at the University of Arizona, Ferrock uses recycled steel dust and glass to produce a substance stronger than conventional concrete. Cement has a high carbon footprint from the high heat needed to process the limestone. Ferrock needs no such heat, and it actually uses CO2 to harden, making it, as Stone calls it, a carbon-negative material. Learn more in the video above, see the transcript at PBS NewsHour and read more at Green Car Reports. Teslarati offers a detailed rundown of Tesla's new Valet Mode feature for the Model S. Part of the Firmware 6.2 update, Valet Mode allows the owner to disable certain performance features and block personal information when letting someone else drive the car. It limits the car's to speed to 70 miles per hour, and caps output at 80 kW. It can also disable mobile app access, Homelink, Bluetooth and wifi and the "Places" function, which stores addresses for you. The folks at Teslarati did find some shortcomings in the new feature, though. Read more at Teslarati. Audi has produced its first batch of e-diesel made from water and CO2. The fuel is made by reacting hydrogen from the water with CO2 to make long-chain hydrocarbon compounds called "blue crude." That can then be refined similarly to crude oil to make e-diesel, which is a fuel free from sulfur and aromatic hydrocarbons. That e-diesel can be used on its own, or mixed with fossil fuel diesel to power a vehicle. "In developing Audi e-diesel we are promoting another fuel based on CO2 that will allow long-distance mobility with virtually no impact on the climate," says Audi Head of Sustainable Product Development Reiner Mangold. Read more in the press release below. Fuel of the future: Research facility in Dresden produces first batch of Audi e-diesel - The verdict: Pilot plant produces high-quality diesel fuel - No need for mineral oil: e-diesel made from water, CO2 and green power - Minister Wanka: "Synthetic diesel using CO2 is a huge success" Audi has taken another big step in the development of new, CO2 neutral fuels: A pilot plant in Dresden has started production of the synthetic fuel Audi e diesel. After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high-quality diesel fuel a few days ago. To demonstrate its suitability for everyday use, Federal Minister of Education and Research Prof.

2016 Audi S8 Plus Quick Spin

Congratulations, that big promotion finally came through, and along with it, a new company car. So go big or go home. Never mind the modest A8 L, with the sensible six-cylinder. The Earth-moving A8 L with its powerful W12, perhaps? No way. You didn't get to the top by being timid or ostentatious, so you choose the new-for-2016 S8 Plus, with a 605-horsepower version of Audi's 4.0-liter, twin-turbo V8, available with an $11,000 Dynamic package that adds ceramic brakes, a sportier exhaust, a rear carbon fiber lip spoiler so tiny you are surprised it does anything, and a boost in governed top speed from 155 miles per hour to 190. Yeah, that's the ticket. The 85-horse boost in power over the outgoing S8 comes from different valve timing, new exhaust valves, and modified turbochargers. The S8 Plus is docile enough around town to carpool to the company luncheons, but point it towards some wide open spaces, and it's a blistering executive express. Driving Notes Much of our Florida test was done in conditions ranging from damp to deluge. Despite the fact that the Audi had summer tires on its 21-inch wheels, the S8 was startlingly sure-footed. Thanks, Quattro all-wheel drive, and a set of better-than-expected Dunlop tires. Power is linear and progressive, and the eight-speed Tiptronic transmission is prepared to downshift at a moment's notice, but is never busy or intrusive. We seldom used the manual shift paddles behind the steering wheel. The comparison between the Dodge Charger Hellcat and this S8 Plus is admittedly absurd, but they are big, heavy, four-door cars with monster motors. And while the Hellcat wants you to hear and feel every engine revolution and supercharger whine, the S8 Plus does all it can to shield you from the drama taking place under the hood. Which is why you look down and suddenly you're going 90. "Dynamic steering" allows for adjustments in steering feel, and we weren't fans in the stiffest setting – it felt notchy and artificial. Comfort mode felt more natural and still gives you all the feedback you need. "Adaptive sport air suspension," though, we had no problem with. It makes short work of potholes and irregular pavement, but firms up when you are cornering – admittedly, in Florida, we had to seek out the rare corners. This is a state with roads designed using a T-square. The aluminum body weighs just 510 pounds. The overall weight of 4,685 pounds, though, means there is still a lot of mass to slow down and steer through corners.

Audi unveils A3 Sportback G-Tron with bi-fuel power, 808-mile range

By this time next year, the Audi A3 Sportback will be offered with a variety fuel-efficient powertrains ranging from diesel to the all-electric E-Tron, but perhaps the most interesting is the all-new G-Tron model, which uses Audi's innovative carbon-natural compressed natural gas called e-gas. Previously called A3 TCNG, we first heard about this technology last year, but now Audi has confirmed that this low-emission, sustainable-fuel will debut by the end of this year on the A3 Sportback G-Tron.
To create this e-gas, a plant in Werlte, Germany uses electricity to split water into hydrogen and oxygen. As hydrogen fuel cell vehicles become more popular, Audi says that this process could also be used to produce hydrogen fuel, but to create CNG, it mixes the hydrogen with carbon dioxide to create "synthetic methane." Since it is identical to the CNG available today, Audi's e-gas can be shipped and stored using the existing CNG infrastructure. Making the whole process even greener, Audi obtains the CO2 for this process from a nearby biogas plant, which would otherwise be released into the atmosphere.
Differentiated from the regular versions of the A3, the G-Tron features a pair of tanks under the rear cargo floor holding 15.43 pounds of CNG, which can power the car for almost 250 miles. What's more, the A3's conventional gasoline tank is still in place, giving the car an addition 560 miles of range. In total, that means the A3 G-Tron has a driving range of more than 800 miles. To run on both CNG and gas, Audi made changes to the car's 1.4-liter four-cylinder engine (including the turbo, cylinder head and fuel injection system) and catalytic converter.