Hydrogen adsorption by microporous materials based on alumina-pillared clays

A New Type of Efficient CO2 Adsorbent with Improved Thermal Stability: Self‐Assembled Nanohybrids with Optimized Microporosity and Gas Adsorption Functions

“…At −196 °C and 101.325 kPa, the derivative of CCT1 material calcined at 500 °C shows an effective adsorption of H 2 gas with the adsorption volume of 45.7 cm 3 g −1 STP or 2.04 mmol g −1 . The observed adsorption capability of the pillared CCT1 nanohybrid is comparable to those of many known and efficient H 2 adsorbents 2, 19, 32–37. This result strongly suggests that the present CCT1 nanohybrid is also applicable for the storage of H 2 gas.…”

“…Third, the incorporation of nanocrystalline metal oxides in‐between layered titanate nanosheets leads to the exposure of many metal sites in micropore wall available for the adsorption of gas molecules. As a consequence of these factors, the CO 2 adsorption capacity of the present CCT1 calcined at 500 °C is superior to those of any other pillared materials and many other adsorbents 1–17, 32–36, 46–47. The observed CO 2 adsorption capacity of this material is comparable to those of MOFs, even though the MOFs possess much larger surface area than the CCT1 32–34, 36.…”

Adsorption studies of hydrogen and ethylene on cation-exchanged bentonite

“…A large number of studies has been carried out on the characterization of the ion-exchanged bentonites (Adams, 1987;Komadel et al, 1990;Cases et al, 1997;Rutherford et al, 1997;Lee et al, 1999;Xu et al, 2000;Jozefaciuk & Bowanko, 2002;Yıldız & Çalımlı, 2002;Neaman et al, 2003;Huang et al, 2004;Volzone & Ortiga, 2004;Çaglar et al, 2009). Information is scarce, however, about the adsorption of ethylene (Choundry et al, 2002;Park et al, 2002;Cho et al, 2005;Saini et al, 2011;Erdogȃn Alver & Sakızcı, 2012;Youngjan, 2012;Erdogȃn Alver et al, 2016) and hydrogen (Gil et al, 2007(Gil et al, , 2009Didier, 2012;Bardelli et al, 2014;Edge, 2015;Mondelli et al, 2015) by clay and clay-based materials. Furthermore, very few publications are available in the literature that discuss the ethylene and hydrogen adsorption properties of K, Na-, Li-, Ag-and Mgmodified bentonites from Turkey.…”

Supercritical hydrogen adsorption in nanostructured solids with hydrogen density variation in pores

“…Some well-known examples of these developments include the Tόth 11 equation (Toth 1962) and the Freundlich equation (Freundlich 1926) both of 12 which have been used for hydrogen adsorption analysis by Gil et al (2009), the 13 Sips equation (Sips 1948) which has been used for analysis by Johansson et al 14 (2002), the modified Dubinin-Astakhov equation (Richard et al 2009) which has 15 been used for analysis by Poirier et al (2006), and the Langmuir-Freundlich 16 equation which has been used for analysis by Choi et al (2003). 17 18 In order to explore the application and credibility of these and other adsorption 19 models for extraction of a variety of parameters including the total hydrogen 20 uptake, selected isotherm equations were applied to hydrogen uptake data for six 21 different nanoporous materials as detailed in the following sections.…”