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freebeard · 02-05-2022, 04:45 PM

Two consecutive stories on SlashDot today:

New 'Game-Changing' Technology Removes 99% of CO2 From the Air (interestingengineering.com)
Posted by BeauHD on Saturday February 05, 2022 @02:00AM from the carbon-capture dept

Quote:

Engineers from the University of Delaware developed a method for effectively capturing 99 percent of carbon dioxide from the air using an electrochemical system powered by hydrogen, a press statement reveals. Interesting Engineering reports:

Quote:

The new system, outlined in a new paper in the journal Nature Energy, was actually born out of a setback in another research project. The team behind the new technology was originally working on hydroxide exchange membrane (HEM) fuel cells, a more affordable and environmentally friendly alternative to traditional acid-based fuel cells. While working on that technology, the team was faced with a serious obstacle. HEM fuel cells, they found, are very sensitive to carbon dioxide in the air, making it hard for the batteries to function properly.
[snip]
Today, the team has a more compact system that is capable of filtering greater quantities of air. According to the researchers, their soda can-sized early prototype device is capable of filtering roughly 10 liters of air per minute and of removing about 98 percent of CO2... The team's prototype is designed to scrub CO2 out of a vehicle's exhaust, though it could also be used for a number of other applications, including aircraft, spacecraft, and submarines.

Satellite Images Show Biggest Methane Leaks Come From Russia and US (newscientist.com)
Posted by BeauHD on Friday February 04, 2022 @10:30PM from the super-emitting-events dept.

Quote:

About a tenth of the global oil and gas industry's methane emissions have been found to come from a group of "ultra-emitter" sites located mostly in Turkmenistan, Russia and the US. Methane is a powerful greenhouse gas that governments recently agreed to slash by 2030. While huge plumes of methane leaking from gas pipelines have been detected by satellites at individual sites, such as a gas well in Ohio and several pipelines in central Turkmenistan, little has been know about their extent globally.

Now, images captured by an instrument aboard a satellite have been run through an algorithm to automatically detect the biggest plumes of methane streaming from oil and gas facilities worldwide. These ultra-emitters were spotted pumping out more than 25 tons of methane an hour.

aerohead · 02-07-2022, 02:34 PM

Quote:

Originally Posted by freebeard

Two consecutive stories on SlashDot today:

New 'Game-Changing' Technology Removes 99% of CO2 From the Air (interestingengineering.com)
Posted by BeauHD on Saturday February 05, 2022 @02:00AM from the carbon-capture dept

Satellite Images Show Biggest Methane Leaks Come From Russia and US (newscientist.com)
Posted by BeauHD on Friday February 04, 2022 @10:30PM from the super-emitting-events dept.

And the hydrogen will be from methane ( natural gas ) and fracking, 21-times more potent a greenhouse gas than the carbon dioxide they're scrubbing.
Apollo-13 ( Lithium Hydroxide ) meets tailpipe?

oil pan 4 · 02-14-2022, 08:47 AM

A case of "the more we learn, we start to realize how little we actually know".
https://eos.org/opinions/quit-worryi...el-projections

freebeard · 02-15-2022, 02:05 AM

science.slashdot.org: Study Finds Western Megadrought is the Worst in 1,200 Years (npr.org)
Posted by msmash on Monday February 14, 2022 @01:45PM from the closer-look dept

Quote:

The Western U.S. and Northern Mexico are experiencing their driest period in at least 1,200 years, according to the new study published in the journal Nature Climate Change. The last comparable -- though not as severe -- multi-decade megadrought occurred in the 1500s, when the West was still largely inhabited by American Indian tribes. [snip] They sampled data collected from live trees, dead trees and wood beams preserved at Native American archeological sites. The tree rings gave Williams an insight into drought events dating back to the year 800 AD, around the same time Charlemagne was being crowned Emperor of Rome. He identified four other megadroughts in that time period, the most notable being a 23-year drought that ended in the late 1500's. There were hopes during a wet 2019 that the current megadrought was following a similar pattern, Williams said. "And then from summer 2020 through all of 2021, it was just exceptionally dry across the West...indicating that this drought is nowhere near done."

Is it time for the domed-over cities yet?

Piotrsko · 02-15-2022, 11:18 AM

Domed city won't help Reno, the water comes from 50 miles away.

oil pan 4 · 02-15-2022, 02:32 PM

I have a well that pumps 100gpm because the well driller said it was on the underground river.
Last solsr minimum it was so dry that in west Texas jack rabbits were dieing of thurst and they can survive with out drinking any liquid water.
And it's killed pear cactus here locally..

freebeard · 02-15-2022, 03:26 PM

We don't have to go to Mars, we can just move to Aridzona.