Adsorption kinetics of rhodium (III) acetylacetonate onto mesoporous silica adsorbents in the presence of supercritical carbon dioxide

Ikuo Ushiki, Naoto Takahashi, Mio Koike, Yoshiyuki Sato, Shigeki Takishima, Hiroshi Inomata

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The adsorption kinetics of rhodium (III) acetylacetonate (Rh(acac)3) onto three types of mesoporous silica adsorbents, MCM-41, HMS, and MSU-H, in the presence of supercritical carbon dioxide (scCO2) at temperatures from 313 to 353 K and at a pressure of 15.0 MPa were studied using fixed-bed adsorption measurements. The breakthrough curves obtained with the measurements were correlated by a mathematical kinetic model using only one fitting parameter, the effective diffusion coefficient of Rh(acac)3 in pores (De). The determined De values depended strongly on the temperature and the types of mesoporous silica used, which could be described using a generalized model that includes the parameters in consideration of the pore structure of the adsorbents (porosity and tortuosity) and the diffusion coefficient of Rh(acac)3 in the bulk scCO2 phase.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalJournal of Supercritical Fluids
Volume135
DOIs
Publication statusPublished - 2018 May 1

Keywords

  • Adsorption kinetics
  • Breakthrough curve
  • Mesoporous silica
  • Metal precursor
  • Rhodium acetylacetonate
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Adsorption kinetics of rhodium (III) acetylacetonate onto mesoporous silica adsorbents in the presence of supercritical carbon dioxide'. Together they form a unique fingerprint.

  • Cite this