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Capturing methane from the air with zeolites

14.01.2022

Researchers at the Massachusetts Institute of Technology (MIT) have found that zeolites - porous mineral structures often used as commercial adsorbents - are able to absorb and recycle methane (CH4) from the air. This effect is manifested when they are processed with copper. The scientists' work is published in ACS Environment Au.

In a lab experiment, experts placed zeolite particles in a reaction tube and passed air containing varying concentrations of methane through it. Gas levels ranged from 2 ppm to 2%. And the reaction tube was heated to various temperatures.

When heated to 310 degrees Celsius, the zeolite was able to capture and convert 2% of the methane into carbon dioxide (CO100). The process is possible even at low CH4 concentrations and much lower temperatures than are required for other methane capture methods.

At first glance, turning one greenhouse gas into another is not ideal. But the researchers calculated that converting half of atmospheric methane would add only about 0,2% to atmospheric CO2 and result in a 16% reduction in radiative warming. Methane is a much more powerful greenhouse gas than carbon dioxide. It is emitted in large quantities as a result of agricultural activities, coal mining, permafrost thawing, as well as during the processing and transportation of natural gas. Compared to carbon dioxide, methane heats the Earth 81 times more. Therefore, its removal will reduce the short-term negative impact on the climate.

However, the MIT team will have to figure out how to scale up their methane removal method to make air flow more efficiently through the material. Potentially, the first field experiments can be carried out in coal mines and barns, using existing air circulation systems. In addition, clay containing zeolites is so cheap that it is used to make cat litter.

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Google to supply 27 Chromebooks to US schools 03.02.2012

Education is a highly lucrative social life for technology companies. No wonder Intel is actively developing netbooks for use in schools, Apple is also promoting a number of educational initiatives (which is worth at least the latest announcement of digital textbooks within the iBook 2). Not surprisingly, Google also wants to be present in this promising market. Ryan Sheth, Google's head of Chromebook business and education, told an education technology conference in Florida that the search giant will ship more than 27 browser-based laptops to three U.S. school districts (Iowa, Illinois, and South Carolina). Chrome OS as part of a special program.

Including these three districts, according to Mr. Sheth, hundreds of schools in 41 US states now have at least one classroom equipped with Chromebooks. Bringing Google devices into schools is also important to the company because today's students are tomorrow's electronics buyers. But Google should also pay attention to what one Chromebook proponent has to say about her kids' addictions. "A lot of schools use operating systems that are 5-10 years old because of the cost and labor involved in upgrading to the latest standards," Mr. Sheth says. "Chromebooks, on the other hand, automatically update and get better over time."

"Students love tablets. I'm not going to hide this fact from you. They are ready [for them] to bow to you," says Diane Gilbert, a middle school English teacher at Blythwood, South Carolina, who uses tablets in her teaching practice. . However, she notes that Chromebooks are better suited for the educational process due to more convenient printing of texts and publishing work in a teacher-friendly way. Diane Gilbert, a teacher in South Carolina, holds a Chromebook in her hand and says students love the variety in their corpus designs.

Google's first generation of cloud laptops were widely criticized for poor performance, but Samsung showed off a faster Chromebook model at CES 2012. Ryan Sheth also notes that Chromebooks are very good for schools that need light administration and for students who value 8-second downloads and up to 8,5 hours of battery life.

Of course, several thousand devices are a drop in the ocean, if we talk about the global school and educational market. But Google has to start somewhere, and school representatives were happy to tout the benefits of Chromebooks during the roundtable discussion.

"This is the kind of device that students need to learn," said Brian Weinert, technology coordinator for Leiden School District in Illinois. and at home." Chromebooks will replace netbooks for the following reasons, he says: "We're looking for a device that can be discreet. We want teachers to focus on guidance rather than tech support, waiting for laptops to boot up and checking batteries."

Richland Second School District in South Carolina will use 19 Chromebooks as part of a three-year program to provide these devices to students in grades three through 12, Donna Teuber, the district's technology adoption coordinator, said.
Iowa's Council Bluffs Community School District plans to use 2800 devices in high school and 1500 in middle school. The information systems manager for the district announced this at the conference, adding: "Next fall, we hope to give each student one of these devices."

Chromebooks are closely related to Google apps and can also run apps downloaded from the Chrome Web Store or simply downloaded as web pages. In fact, almost the entire environment is limited to the Chrome browser, and all settings and applications are stored in the cloud, making administration a fairly easy task.

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