2010.11.15

Room 637, 6th floor, Engineering Bld #5, Hongo Campus

Prof. Suk Bong Hong
       Department of Chemical Engineering and
       School of Environmental Science and Engineering,
       Pohang University of Science
       and Technology (POSTECH), Korea

Title：Zeolite Syntheses via a Charge Density Mismatch Approach

Abstract：
Zeolites and related microporous solids find widespread application in many technologies, including ion exchange, separation and catalysis. Their advantages over other solids stem directly from their high surface areas and structure-dependent, pore geometries and cation environments. As a consequence, considerable effort is expended in the design of new zeolitic materials with unique structural features that could lead to improvement or development of new commercial processes.

This lecture concentrates on zeolite syntheses via a charge density mismatch (CDM) Approach that was developed by researchers at UOP in the early 2000s. The CDM approach holds a certain degree of rational design in that it forces a cooperative structure direction with double or multiple structure-directing agents (SDAs) and/or a more favorable match with the Negative framework charge density of the resulting aluminosilicate product. After describing some interesting aspects of this relatively new, clever strategy, I will talk about the synthesis and characterization of UZM-12 (framework type ERI), which is one of the aluminosilicate zeolites with known framework structures but unprecedented chemical compositions, and its methanol-to-olefin performance. Another subject of my talk is comparison of the structure-directing ability of Ga with that of Al under four different CDM synthesis conditions in which the Si/Me ratio is varied between 5 ≤ Si/Me ≤ 16, where M is Al or Ga.

Schedule：15:00-16:30 Monday, November 15th, 2010

Place：Room 637, 6th floor, Engineering Bld #5, Hongo Campus

Attached file： The 68th open seminar.pdf