Abstract
A novel gas sorption apparatus will be presented for the precise determination of surface areas, pore size distribution, and chemisorption properties. The instrument is based on a new principle, 1,000 over the most advanced units. The high resolution permits definition of new information of solid materials: Extended range in pore size distribution. Pores up to 6,000 Å can routinely be defined by this technique. The shape of the isotherm is defined by up to 1,000 data points. The pore size distribution and shape of this distribution can, therefore, be described in unique detail. Microporc volume of high surface area solids such as zeolites and activated carbons can be defined. For zeolites, this information can be used to calculate the percent crystallinity and average crystallite size. Detailcd chemisorption infomation and definition of the number of acid sites of solid acids.
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