联系我们  |  网站地图  |  English   |  移动版  |  中国科学院 |ARP
站内搜索:
首页 简介 管理部门 科研部门 支撑部门 研究队伍 科研成果 成果转化 研究生教育 党建与创新文化 科普 信息公开 办公内网
科技信息
Low-cost wearables manuf...
Researchers develop 3-D-...
硫化钴能用来制作超级电容
青岛能源所在石墨炔能源存...
二维非铅钙钛矿动力学机理...
Scientists fine-tune sys...
Amorphous diamond synthe...
化学耦合的硫化镍和碳空心...
全无机钙钛矿光电探测器动...
科研人员提出纳米催化医学...
Newly-discovered semicon...
Molecular nanoparticles ...
碳纳米点固态高效发光新方法
基于甲胺气体的钙钛矿薄膜...
新型镁电池可使储能技术更...
现在位置:首页>新闻动态>科技信息
MOFs provide a better way to remove water from gas
2017-05-19 08:53:59 | 编辑: | 【 【打印】【关闭】

 

Energy efficient gas drying achieved by a metal-organic framework. Credit: © 2017 Mohamed Eddaoudi

  A breakthrough in generating water-stable metal-organic frameworks allows efficient removal of water from gases.

  The conventional view that metal-organic frameworks (MOFs) cannot be stable in water has been overturned by the development of an MOF that can selectively and effectively adsorb water to dry gas streams.

  "The achievement of energy efficient dehydration by our MOF is revolutionary," said Professor Mohamed Eddaoudi, Director of the Advanced Membranes and Porous Materials (AMPM) at the KAUST Division of Physical Science and Engineering.

  Gases, such as natural gas, must be dehydrated before transportation and use to avoid problems including pipeline corrosion and blockages due to methane ice formation. Conventional drying agents require an energy-intensive regeneration cycle.

  The new fluorinated MOF developed by the KAUST team achieves the drying and regeneration cycle at relatively low temperatures and requires about half the energy input of conventional procedures. This dramatic reduction in energy use highlights the obvious potential for upscaling the innovation to bring huge efficiency savings in the gas production and transport industry.

  MOFs are hybrid organic-inorganic materials that contain metal ions or clusters held in place by organic molecules known as linkers. Varying the metal components and organic linkers allows researchers to fine-tune the structure and chemical properties of MOFs. A major aim of this fine-tuning is to create MOFs with cavities that will selectively bind to and retain specific molecules, such as the water that must be removed from a gas stream.

  "Initially, our aim was to adapt our recently introduced fluorine-containing MOFs, to include a periodic array of open metal sites and fluorine centers in the contracted pore system, to achieve various key separations," said Eddaoudi. This exploration led to the discovery of a water-stable MOF— now labeled KAUST-8— with unique water adsorption properties and outstanding recyclable dehydration capabilities. Significantly, KAUST-8 removes carbon dioxide along with water, which is a common requirement in industrial gas processing.

  "I have no doubt that this discovery will inspire scientists in academia and industry to explore MOFs to address other challenges," said Eddaoudi. The KAUST team sees additional possibilities may include the removal of water from liquids, such as inks and solvents used in the electronics industry.

  Explore further: Tweaking the structure of metal-organic frameworks could transform the capacity to use methane as a fuel 

  More information: DOI: 10.1126/science.aam8310 A. Cadiau el al., "Hydrolytically stable fluorinated metal-organic frameworks for energy-efficient dehydration," Science (2017). http://science.sciencemag.org/cgi/doi/10.1126/science.aam8310

  Journal reference: Science  

版权所有 中国科学院上海硅酸盐研究所 沪ICP备05005480号
长宁园区地址:上海市长宁区定西路1295号 电话:86-21-52412990 传真:86-21-52413903 邮编:200050
嘉定园区地址:上海市嘉定区和硕路585号  电话:86-21-69906002 传真:86-21-69906700 邮编:201899