Pore-size distributions of copper oxide-alumina catalysts

Abstract

Six copper oxide-alumina catalysts were prepared using cupric chloride, bromide, nitrate, or sulfate in conjunction with sodium or potassium hydroxide, with wet or dry alumina as the carrier. The pore-size distributions were determined by the Cranston-lnkley method, based on adsorption isotherms. The resulting distributions, unimodal or multimodal, were adequately represented by simple or complex Weibull distributions. The surface areas based on the Cranston-lnkley method were compared with the BET areas.

Preparation of Large-Pore-Volume γ-Alumina Nanofibers with a Narrow Pore Size Distribution in a Membrane Dispersion Microreactor

“…The sample JHN-03 was synthesized by a well-known company in China in a stirred tank via the pH swing method. For the sake of a quantitative comparison, the pore size distribution curve was fitted to a log-normal distribution function: The variance ω 2 is determined from the fitted curves in Figure to represent the distribution concentration, and a smaller variance indicates a more narrow pore size distribution. Clearly, the samples prepared in the membrane dispersion microreactor fit better to the log-normal distribution function and have a much more narrow pore size distribution.…”

“…The sample JHN-03 was synthesized by a well-known company in China in a stirred tank via the pH swing method. For the sake of a quantitative comparison, the pore size distribution curve was fitted to a log-normal distribution function: 31…”