Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Environment & Energy
Related: About this forumCrystallization method offers new option for carbon capture from ambient air
(Please note, material from Oak Ridge National Laboratorycopyright concerns are nil.)
https://www.ornl.gov/news/crystallization-method-offers-new-option-carbon-capture-ambient-air
[font face=Serif][font size=5]Crystallization method offers new option for carbon capture from ambient air[/font]
January 9, 2017
Media Contact
Sara Shoemaker, Communications
[font size=3]OAK RIDGE, Tenn., Jan. 9, 2017 Scientists at the Department of Energys Oak Ridge National Laboratory have found a simple, reliable process to capture carbon dioxide directly from ambient air, offering a new option for carbon capture and storage strategies to combat global warming.
Initially, the ORNL team was studying methods to remove environmental contaminants such as sulfate, chromate or phosphate from water. To remove those negatively charged ions, the researchers synthesized a simple compound known as guanidine designed to bind strongly to the contaminants and form insoluble crystals that are easily separated from water.
In the process, they discovered a method to capture and release carbon dioxide that requires minimal energy and chemical input. Their results are published in the journal Angewandte Chemie International Edition.
When we left an aqueous solution of the guanidine open to air, beautiful prism-like crystals started to form, ORNLs Radu Custelcean said. After analyzing their structure by X-ray diffraction, we were surprised to find the crystals contained carbonate, which forms when carbon dioxide from air reacts with water.
Decades of research has led to the development of carbon capture and long-term storage strategies to lessen the output or remove power plants emissions of carbon dioxide, a heat-trapping greenhouse gas contributing to a global rise in temperatures. Carbon capture and storage strategies comprise an integrated system of technologies that collects carbon dioxide from the point of release or directly from the air, then transports and stores it at designated locations.
A less traditional method that absorbs carbon dioxide already present in the atmosphere, called direct air capture, is the focus of ORNLs research described in this paper, although it could also be used at the point where carbon dioxide is emitted.
Once carbon dioxide is captured, it needs to be released from the compound so the gas can be transported, usually through a pipeline, and injected deep underground for storage. Traditional direct air capture materials must be heated up to 900 degrees Celsius to release the gas -- a process that often emits more carbon dioxide than initially removed. The ORNL-developed guanidine material offers a less energy-intensive alternative.
Through our process, we were able to release the bound carbon dioxide by heating the crystals at 80-120 degrees Celsius, which is relatively mild when compared with current methods, Custelcean said. After heating, the crystals reverted to the original guanidine material. The recovered compound was recycled through three consecutive carbon capture and release cycles.
While the direct air capture method is gaining traction, according to Custelcean, the process needs to be further developed and aggressively implemented to be effective in combatting global warming. Also, they need to gain a better understanding of the guanidine material and how it could benefit existing and future carbon capture and storage applications.
The research team is now studying the materials crystalline structure and properties with the unique neutron scattering capabilities at ORNLs Spallation Neutron Source (SNS), a DOE Office of Science User Facility. By analyzing carbonate binding in the crystals, they hope to better understand the molecular mechanism of carbon dioxide capture and release and help design the next generation of sorbents.
The scientists also plan to evaluate the use of solar energy as a sustainable heat source to release the bound carbon dioxide from the crystals.
The study titled, CO2 Capture from Ambient Air by Crystallization with a Guanidine Sorbent, included Charles Seipp of ORNL and the University of Texas at Austin; Neil Williams of ORNL and the University of Tennessee; and ORNLs Michelle Kidder and Radu Custelcean.
The research was funded by DOEs Office of Science.
UT-Battelle manages ORNL for DOEs Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit http://science.energy.gov/.[/font][/font]
http://dx.doi.org/10.1002/anie.201610916January 9, 2017
Media Contact
Sara Shoemaker, Communications
[font size=3]OAK RIDGE, Tenn., Jan. 9, 2017 Scientists at the Department of Energys Oak Ridge National Laboratory have found a simple, reliable process to capture carbon dioxide directly from ambient air, offering a new option for carbon capture and storage strategies to combat global warming.
Initially, the ORNL team was studying methods to remove environmental contaminants such as sulfate, chromate or phosphate from water. To remove those negatively charged ions, the researchers synthesized a simple compound known as guanidine designed to bind strongly to the contaminants and form insoluble crystals that are easily separated from water.
In the process, they discovered a method to capture and release carbon dioxide that requires minimal energy and chemical input. Their results are published in the journal Angewandte Chemie International Edition.
When we left an aqueous solution of the guanidine open to air, beautiful prism-like crystals started to form, ORNLs Radu Custelcean said. After analyzing their structure by X-ray diffraction, we were surprised to find the crystals contained carbonate, which forms when carbon dioxide from air reacts with water.
[font size=1]When an aqueous solution of a simple guanidine compound was open to air, beautiful prism-like crystals started to form as the material absorbed carbon dioxide.[/font]
Decades of research has led to the development of carbon capture and long-term storage strategies to lessen the output or remove power plants emissions of carbon dioxide, a heat-trapping greenhouse gas contributing to a global rise in temperatures. Carbon capture and storage strategies comprise an integrated system of technologies that collects carbon dioxide from the point of release or directly from the air, then transports and stores it at designated locations.
A less traditional method that absorbs carbon dioxide already present in the atmosphere, called direct air capture, is the focus of ORNLs research described in this paper, although it could also be used at the point where carbon dioxide is emitted.
Once carbon dioxide is captured, it needs to be released from the compound so the gas can be transported, usually through a pipeline, and injected deep underground for storage. Traditional direct air capture materials must be heated up to 900 degrees Celsius to release the gas -- a process that often emits more carbon dioxide than initially removed. The ORNL-developed guanidine material offers a less energy-intensive alternative.
Through our process, we were able to release the bound carbon dioxide by heating the crystals at 80-120 degrees Celsius, which is relatively mild when compared with current methods, Custelcean said. After heating, the crystals reverted to the original guanidine material. The recovered compound was recycled through three consecutive carbon capture and release cycles.
While the direct air capture method is gaining traction, according to Custelcean, the process needs to be further developed and aggressively implemented to be effective in combatting global warming. Also, they need to gain a better understanding of the guanidine material and how it could benefit existing and future carbon capture and storage applications.
The research team is now studying the materials crystalline structure and properties with the unique neutron scattering capabilities at ORNLs Spallation Neutron Source (SNS), a DOE Office of Science User Facility. By analyzing carbonate binding in the crystals, they hope to better understand the molecular mechanism of carbon dioxide capture and release and help design the next generation of sorbents.
The scientists also plan to evaluate the use of solar energy as a sustainable heat source to release the bound carbon dioxide from the crystals.
The study titled, CO2 Capture from Ambient Air by Crystallization with a Guanidine Sorbent, included Charles Seipp of ORNL and the University of Texas at Austin; Neil Williams of ORNL and the University of Tennessee; and ORNLs Michelle Kidder and Radu Custelcean.
The research was funded by DOEs Office of Science.
UT-Battelle manages ORNL for DOEs Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit http://science.energy.gov/.[/font][/font]
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
0 replies, 1541 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (5)
ReplyReply to this post