[Home]  [Headlines]  [Latest Articles]  [Latest Comments]  [Post]  [Mail]  [Sign-in]  [Setup]  [Help]  [Register] 

Russia Is the Last Remaining Christian Country

Zelensky’s Long History of Crushing Dissent

Zelensky Seeks To Ban Russian Orthodox Church In Ukraine

VIDEO: Kevin McCarthy Confronted Heading Into State Dinner Attended By Hunter Biden

This is horrifying - yeT DemocraTs will say ... “AnyThing BuT Trump!” --- Our counTry has gone drown The (uke)drain.

Sen. Cruz Outlines the Grim Outcome If Herschel Loses Georgia

Dutch Police Overturn Farmers’ Tractors with Farmers in Them –

Growing Number of GOP Leaders, Elected Officials Say It's Time for a Change in RNC Leadership

CNN Starts Layoffs And WaPo Ends Sunday Magazine Amid "Economic Headwinds"

'Lobbying Firm for Far Left Politicians': Elon Musk Rips NY Times for Silence on Twitter Censorship Story

Texas Girl, 7, Found Dead 2 Days After Being Abducted by FedEx Driver Delivering a Package to Her Home

Underdog: Stacked Up Against 11 Coyotes, Herd Dog Kills 8 to Save Sheep in Decatur Neighborhood

Winter in Central Europe and for the Dollar

Children’s Minister Arrested for 215 Counts of Child Porn Linked to Agape Boarding School

“You can’t … you’re not capable … you can only succeed if ….”

SBC President Bart Barber Says Predecessor Johnny Hunt is Unfit to Return to Ministry

Premature baby who weighed the same as a loaf of bread heads home

State Figures Provide Important Context for National Abortion Trends

MinistryWatch’s 2022 Shining Light Awards

The Woke Chokehold

Texas Abortions Drop From 2,500 to 68 in First Month After Roe Overturned

Why do Democrats refuse to treat abortion survivors? A dead baby was always the point. How you got there was just details.

Bethel Members Now Have Majority on Redding City Council

New Zealand admits it has direct access to Facebook takedown portal where it can flag content for censorship

This is how the ELCA celebrated Thanksgiving

Targeting Families: Former Sex Educator Exposes Horror Aimed at Children

Exclusionary Inclusionism

The Evil of the Political Left Is Rooted in Their Exploitation of Tragedies

BidenÂ’s hypocrisy on unions: Everyone else pays but him

Americans Can't Pay Energy Bills – Biden Gives $53M to Restore Ukraine's Energy

Large Number of Criminal Juveniles Entering US Through DACA

Zeldin RNC Bid Gains Momentum as Party Leaders Line Up Behind Him (Replace RINO Ronna Romney McDaniel)

Lawyer Who Sought to Defend Trump Dies Suddenly at 48

Florida Takes $2 Billion Away From BlackRock Due To Firm's Activist Investing Standards

DEROY MURDOCK: Electing Herschel Walker Is More Important Now Than Ever

Report, Ronna McDaniel Pulls Ground Resources from Arizona Motivated by RNC Power Challenge

Hired by the RNC, Harmeet Dhillon Teams Up with the Mitch McConnell Contracted Enforcer Who Destroyed the Tea Party

America-Last RINO Kevin McCarthy Attended State Dinner With Hunter Biden and Emmanuel Macron

What does the Bible say about cryonics or cryogenics?

(Warning this article is by a loon)By 2030, We Will be able to Prevent Most Disease And Arrive on Mars, the New Earth with No Seas

4. The Murder Rate and O.D. Rates Will Double In Most U.S. States

Zelensky Says EU's €18 Billion Aid Is What "True Solidarity" Looks Like

Oops! $20B Sent to Ukraine Is Unaccounted for

20 NATO States "Pretty Tapped Out" After Weapons Transfers To Ukraine

Two Oath Keepers, Including Founder Stewart Rhodes, Found Guilty Of Jan. 6 Seditious Conspiracy

US Tech Workers Kiss More Jobs Goodbye -The Eagle Act's Back

Democrat Adam Schiff Suggests Complying With Subpoenas is Optional, Now

Zero Republican Professors Found Across 33 Departments at Seven Universities: College Fix Analysis

Kristi Noem Bans TikTok Use On South Dakota State Devices

Arizona Official Certifies Election 'Under Duress', Says He's Under Threat of Arrest If He DoesnÂ’t Comply


Status: Not Logged In; Sign In

Science-Technology
See other Science-Technology Articles

Title: This new solar-powered device can pull water straight from the desert air
Source: Science Magazine
URL Source: http://www.sciencemag.org/news/2017 ... pull-water-straight-desert-air
Published: Apr 13, 2017
Author: Robert Service
Post Date: 2017-04-13 17:12:55 by cranky
Keywords: None
Views: 714
Comments: 4

Crystalline materials similar to these can now harvest water vapor from the air.

You can’t squeeze blood from a stone, but wringing water from the desert sky is now possible, thanks to a new spongelike device that uses sunlight to suck water vapor from air, even in low humidity. The device can produce nearly 3 liters of water per day, and researchers say future versions will be even better. That means homes in the driest parts of the world could soon have a solar-powered appliance capable of delivering all the water they need, offering relief to billions of people.

The new water harvester is made of metal organic framework crystals pressed into a thin sheet of copper metal and placed between a solar absorber (above) and a condenser plate (below).

To find an all-purpose solution, researchers led by Omar Yaghi, a chemist at the University of California, Berkeley, turned to a family of crystalline powders called metal organic frameworks, or MOFs. Yaghi developed the first MOFs—porous crystals that form continuous 3D networks—more than 20 years ago. The networks assemble in a Tinkertoy-like fashion from metal atoms that act as the hubs and sticklike organic compounds that link the hubs together. By choosing different metals and organics, chemists can dial in the properties of each MOF, controlling what gases bind to them, and how strongly they hold on.

Over the past 2 decades chemists have synthesized more than 20,000 MOFs, each with unique molecule-grabbing properties. For example, Yaghi and others recently designed MOFs that absorb—and later release—methane, making them a type of high-capacity gas tank for natural gas–powered vehicles.

In 2014, Yaghi and his colleagues synthesized a MOF that excelled at absorbing water, even under low-humidity conditions. That led him to reach out to Evelyn Wang, a mechanical engineer at the Massachusetts Institute of Technology (MIT) in Cambridge, with whom he had previously worked on a project to use MOFs in automobile air conditioning. After synthesizing the new zirconium-based MOF, dubbed MOF-801, Yaghi met Wang at MIT and said, “Evelyn we have to come up with a water harvesting device.” She agreed to give it a shot.

Device pulls water from the air

At night setup soaks up water vapor from air, and uses heat from the sun to release it as liquid water during the day.

The system Wang and her students designed consists of a kilogram of dust-sized MOF crystals pressed into a thin sheet of porous copper metal. That sheet is placed between a solar absorber and a condenser plate and positioned inside a chamber. At night the chamber is opened, allowing ambient air to diffuse through the porous MOF and water molecules to stick to its interior surfaces, gathering in groups of eight to form tiny cubic droplets. In the morning, the chamber is closed, and sunlight entering through a window on top of the device then heats up the MOF, which liberates the water droplets and drives them—as vapor—toward the cooler condenser. The temperature difference, as well as the high humidity inside the chamber, causes the vapor to condense as liquid water, which drips into a collector. The setup works so well that it pulls 2.8 liters of water out of the air per day when run continuously, the Berkeley and MIT team reports today in Science.

“It has been a longstanding dream” to harvest water from desert air, says Mercouri Kanatzidis, a chemist at Northwestern University in Evanston, Illinois, who wasn’t involved with the work. “This demonstration … is a significant proof of concept.” It’s also one that Yaghi says has plenty of room for improvement. For starters, zirconium costs $150 a kilogram, making water harvesting devices too expensive to be broadly useful. However, Yaghi says his group has already had early success in designing water-grabbing MOFs that replace zirconium with aluminum, a metal that is 100 times cheaper. That could make future water harvesters cheap enough not only to slake the thirst of people in arid regions, but perhaps even supply water to farmers in the desert. (3 images)

Post Comment   Private Reply   Ignore Thread  


TopPage UpFull ThreadPage DownBottom/Latest

#1. To: cranky (#0)

This is very, very cool !!

Si vis pacem, para bellum

Rebellion to tyrants is obedience to God.

There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag... We have room for but one language here, and that is the English language... and we have room for but one sole loyalty and that is a loyalty to the American people."Theodore Roosevelt-1907.

I am concerned for the security of our great nation; not so much because of any threat from without, but because of the insidious forces working from within." -- General Douglas MacArthur

Stoner  posted on  2017-04-13   18:06:24 ET  Reply   Trace   Private Reply  


#2. To: Stoner (#1)

This is very, very cool !!

It sounds too good to be true.

There has to be a catch.

cranky  posted on  2017-04-13   18:31:56 ET  Reply   Trace   Private Reply  


#3. To: cranky (#0)

Me thinks somebody's in for a serious dissappointment.

rlk  posted on  2017-04-13   23:54:29 ET  Reply   Trace   Private Reply  


#4. To: cranky (#0)

let us hope it is capable of being scaled up. Suddenly one problem is Mars exploration has been solved, next stop extract oxygen

paraclete  posted on  2017-04-14   1:56:01 ET  Reply   Trace   Private Reply  


TopPage UpFull ThreadPage DownBottom/Latest

[Home]  [Headlines]  [Latest Articles]  [Latest Comments]  [Post]  [Mail]  [Sign-in]  [Setup]  [Help]  [Register] 

Please report web page problems, questions and comments to webmaster@libertysflame.com