TITLE: Microstructural Evolution of an Iron Silicate Catalyst with Thermal and Hydrothermal Treatments.

AUTHOR: R. Csencsits.

INST.  AUTHOR: Lawrence Berkeley Lab., CA.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Mar 88,  2p.

NTIS ORDER NO.: DE88010786/INW

ABSTRACT:

Iron silicate analogs of the zeolite ZSM-5 may be directly synthesized from iron silicate gels in a manner which differs slightly from the alumino-silicate ZSM-5. The resultant white, crystalline iron silicate is referred to as FeZSM-5 in the as-synthesized form. Thermal treatment removes the organic crystal-directing agent and moves some of the framework iron into non-framework sites producing the calcined form of the molecular sieve FeZSM-5. Scanning electron microscopy (SEM) was used to characterize the overall molecular sieve particle sizes and morphologies as a function of preparation conditions. Transmission electron microscopy (TEM) was used to follow the microstructural changes in the iron silicate molecular sieve as a function of synthesis and treatment conditions. 4 refs., 2 figs. (ERA citation 13:045408)

REPORT  NUMBER: LBL-25171;   CONF-880841-16

CONTRACT  NUMBER: AC03-76SF00098