A reference high-pressure CH4 adsorption isotherm for zeolite Y: results of an interlaboratory study
Huong Giang T. Nguyen, Christopher M. Sims, Blaza Toman, Jarod C. Horn, Roger D. van Zee, Matthias Thommes, Riaz Ahmad, Joeri Denayer, Gino V. Baron, Emilio Napolitano, Marek Bielewski, Enzo Mangano, Stefano Brandani, Darren P. Broom, Michael J. Benham, Anne Dailly, F. Dreisbach, Satyannarayana Edubilli, Sasidhar Gumma, Jens Möllmer, Marcus Lange, Mi Tian, Timothy J. Mays, Toru Shigeoka, Shigehiro Yamakita, Masako Hakuman, Yoshinao Nakada, Kiyoshi Nakai, Junyoung Hwang, Ronny Pini, Heng Jiang, A. D. Ebner, M. A. Nicholson, James A. Ritter, Judit Farrando-Pérez, Carlos Cuadrado‐Collados, Joaquín Silvestre‐Albero, Christos Tampaxis, Theodore Steriotis, Daniela Řimnáčová, Martina Švábová, Maryna Vorokhta, Hefang Wang, Eric Bovens, Nicolas Heymans, Guy De Weireld
Abstract
Abstract This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess methane adsorption isotherms on NIST Reference Material RM 8850 (Zeolite Y), at 25 °C up to 7.5 MPa. Twenty laboratories participated in the study and contributed over one-hundred adsorption isotherms of methane on Zeolite Y. From these data, an empirical reference equation was determined, along with a 95% uncertainty interval ( U k =2 ). By requiring participants to replicate a high-pressure reference isotherm for carbon dioxide adsorption on NIST Reference Material RM 8852 (ZSM-5), this interlaboratory study also demonstrated the usefulness of reference isotherms in evaluating the performance of high-pressure adsorption experiments.