Hydrolytically stable fluorinated metal-organic frameworks for energy-efficient dehydration
2017; American Association for the Advancement of Science; Volume: 356; Issue: 6339 Linguagem: Inglês
10.1126/science.aam8310
ISSN1095-9203
AutoresAmandine Cadiau, Youssef Belmabkhout, Karim Adil, Prashant M. Bhatt, Renjith S. Pillai, Aleksander Shkurenko, Charlotte Martineau, Guillaume Maurin, Mohamed Eddaoudi,
Tópico(s)Membrane Separation and Gas Transport
ResumoNatural gas must be dehydrated before it can be transported and used, but conventional drying agents such as activated alumina or inorganic molecular sieves require an energy-intensive desiccant-regeneration step. We report a hydrolytically stable fluorinated metal-organic framework, AlFFIVE-1-Ni (KAUST-8), with a periodic array of open metal coordination sites and fluorine moieties within the contracted square-shaped one-dimensional channel. This material selectively removed water vapor from gas streams containing CO2, N2, CH4, and higher hydrocarbons typical of natural gas, as well as selectively removed both H2O and CO2 in N2-containing streams. The complete desorption of the adsorbed water molecules contained by the AlFFIVE-1-Ni sorbent requires relatively moderate temperature (~105°C) and about half the energy input for commonly used desiccants.
Referência(s)