Effect of nanoscale curvature sign and bundle structure on supercritical H2 and CH4 adsorptivity of single wall carbon nanotube

The adsorptivities of supercritical CH(4) and H(2) of the external and internal tube walls of single wall carbon nanotube (SWCNT) were determined. The internal tube wall of the negative curvature showed the higher adsorptivities for supercritical CH(4) and H(2) than the external tube wall of the positive curvature due to their interaction potential difference. Fine SWCNT bundles were prepared by the capillary force-aided drying treatment using toluene or methanol in order to produce the interstitial pore spaces having the strongest interaction potential for CH(4) or H(2); the bundled SWCNT showed the highest adsorptivity for supercritical CH(4) and H(2). It was clearly shown that these nanostructures of SWCNTs are crucial for supercritical gas adsorptivity.ArticleADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY. 17(3):643-651 (2011)journal articl

Adsorptivities of Extremely High Surface Area Activated Carbon Fibres for CH and H

Activated carbon fibres with extremely high surface areas (ACFs) were prepared by CO 2 re-activation using pitch-based ACFs having an original surface area of 1730 m 2 /g. The highest surface area of the re-activated ACFs was 2930 m 2 /g as determined from an α S -plot analysis of the nitrogen adsorption isotherm measured at 77 K. The ACF with the highest surface area showed excellent adsorptivity towards supercritical CH 4 and H 2 . The amounts of CH 4 and H 2 adsorbed were enhanced by 52% and 30%, respectively, as a result of re-activation

Zeolites and Other Adsorbents

The authors thank the Spanish Ministry of Economy, Industry and Competitiveness for its funding by means of the projects (MAT2015-71842-P MINECO/FEDER and Severo Ochoa SEV-2016-0683). EPB acknowledges the Spanish Ministry of Education, Culture and Sport for the FPU grant FPU15/01602