Advanced Physical Adsorption Characterization of Nanoporous Carbons
2012; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-08-097744-7.00004-1
AutoresMatthias Thommes, Katie A. Cychosz, Alexander V. Neimark,
Tópico(s)Zeolite Catalysis and Synthesis
ResumoWithin the last two decades, major progress has been achieved in understanding the adsorption and phase behavior of fluids in ordered nanoporous materials and in the development of advanced theoretical approaches based on statistical mechanics such as density functional theory (DFT) of inhomogeneous fluids and molecular simulation, leading to advances in structural characterization by physical adsorption. It was demonstrated that the application of DFT-based methods provides a much more accurate and comprehensive pore-size analysis compared to macroscopic, thermodynamic methods such as the Dubinin–Radushkevich, Horvath Kawazoe, and Kelvin equation approaches. In particular, the recently developed quenched solid density functional theory (QSDFT) method quantitatively accounts for surface heterogeneity and gives a reliable pore-size assessment for disordered micro- and mesoporous carbons. This chapter provides an overview of the major underlying mechanisms associated with adsorption, pore condensation, and hysteresis behavior in micro- and mesoporous carbons and discusses selected examples of state-of-the-art surface and pore-size characterization.
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