Hydrocarbon sorption properties of pure silica MCM-22 type zeolite

✍ Scribed by Hongwei Du; Mohan Kalyanaraman; Miguel A. Camblor; David H. Olson

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 398 KB
• Volume: 40
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(00)00269-9

✦ Synopsis

The adsorption properties of the MWW compositional end member, ITQ-1, have been explored empirically and via computer simulation using n-hexane, 3-methylpentane, 2,3-dimethylbutane, p-xylene and ethylbenzene as adsorbate probes. n-Hexane and 3-methlypentane diuse rapidly and both have a sorption limit of four molecules per unit cell, three of which are in the large channel cavities. 2,3-dimethylbutane sorbs more slowly through the 10-ring windows; the limiting three molecules per unit cell are all in the large cavities. The two aromatics adsorb in both channel systems, with p-xylene diusing rapidly and ethylbenzene more slowly but much faster than 2,3-dimethylbutane. No clear distinction between intra-and extra-crystalline adsorption was observed. Computer modeling indicated distinctions between the two channel systems.