TITLE: Electron Microscopy Study of Morphology and Composition of a Ferrisilicate Catalyst.

AUTHOR: R. Csencsits;   R. Gronsky;   V. Nair;   R. Szostak.

INST.  AUTHOR: Lawrence Berkeley Lab., CA.

SPONSOR: Union Carbide Corp., Tarrytown, NY.*Georgia Inst. of Tech.,

Atlanta. Research Inst.*Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Dec 87,  8p.

NTIS ORDER NO.: DE88005754/INW

NOTES: Fall meeting of the Materials Research Society, Boston, MA, USA, 30 Nov 1987.

ABSTRACT:

The effects of various synthesis conditions on the structure and composition of ferrisilicate analogs of zeolite ZSM-5 were considered.  Scanning electron microscopy (SEM) was used to determine the particles size distributions and morphologies. Particle sizes vary from tenths of a micron to several microns, depending on degree of agitation during crystal growth, while morphology is additionally dependent on the concentration of iron in the gel during crystallization. X-ray emissive spectroscopy (XES) performed in the transmission electron microscope (TEM) was used to determine their composition variation. The distribution of iron among the crystals is more homogeneous if the gel is stirred and it does not depend on particle size. 3 figs., 1 tab. (ERA citation 13:018685)

REPORT  NUMBER: LBL-24117;   CONF-871124-70

CONTRACT  NUMBER: AC03-76SF00098