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Title: An Ultrahigh CO2-Loaded Silicalite-1 Zeolite: Structural Stability and Physical Properties at High Pressures and Temperatures

Journal Article · · Inorganic Chemistry
 [1]; ORCiD logo [1];  [2];  [1]; ORCiD logo [3];  [3];  [4];  [4];  [5];  [6];  [7];  [8]; ORCiD logo [8]
  1. Univ. de Valencia (Spain)
  2. Univ. de Valencia (Spain); Univ. de Cantabria, Santander (Spain)
  3. Univ. Politècnica de València (Spain)
  4. Univ. of California, Los Angeles, CA (United States)
  5. Atomic Weapons Establishment (AWE), Reading (United Kingdom); Imperial College, London (United Kingdom)
  6. Diamond Light Source, Didcot, Oxon (United Kingdom)
  7. CELLS-ALBA Synchrotron, Barcelona (Spain)
  8. Univ. de La Laguna, Tenerife (Spain)

We report the formation of an ultrahigh CO2-loaded pure-SiO2 silicalite-1 structure at high pressure (0.7 GPa) from the interaction of empty zeolite and fluid CO2 medium. The CO2-filled structure was characterized in situ by means of synchrotron powder X-ray diffraction. Rietveld refinements and Fourier recycling allowed the location of 16 guest carbon dioxide molecules per unit cell within the straight and sinusoidal channels of the porous framework to be analyzed. The complete filling of pores by CO2 molecules favors structural stability under compression, avoiding pressure-induced amorphization below 20 GPa, and significantly reduces the compressibility of the system compared to that of the parental empty one. Additionally, the structure of CO2-loaded silicalite-1 was monitored at high pressures and temperatures, and its thermal expansivity was estimated.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
European Regional Development Fund (ERDF); Ministry of Economy and Competitiveness (MINECO); National Science Foundation (NSF); Severo Ochoa; State Research Agency (AEI); USDOE Office of Science (SC); University of Valencia
Grant/Contract Number:
AC02-06CH11357; FG02-94ER14466
OSTI ID:
1459955
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 11 Vol. 57; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

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