TITLE: Cation Promotion Effects in Zeolite-Supported F-T Catalysts. Sixth Quarterly Report, December 1984-February 1985.

AUTHOR: J. G. Goodwin;   R. Oukaci;   D. Feng.

INST.  AUTHOR: Pittsburgh Univ., PA. Dept. of Chemical and Petroleum Engineering.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Mar 85,  29p.

NTIS ORDER NO.: DE85009969/INW

ABSTRACT:

During this quarter, the TGA studies of ammonia adsorption carried out to determine the effect of alkali cations and Si/Al ratio of the various ion exchanged zeolites on the surface acidity have been completed. The results obtained from these measurements are presented. Also, during this quarter a new batch of ruthenium catalysts has been prepared. The same preparation method as described in the first quarterly report has been used except for the decomposition step prior to reduction with hydrogen. It has been frequently reported in the literature that the Ru-hexamine complex can be decomposed either under flowing helium or by degassing under vacuum at 673 K, the rate of heating being the major factor controlling the metal dispersion. However, as observed in the previous report, the first method (i.e. decomposition under flowing helium) produced rather low dispersed Ru-catalysts, except for the Ru/NaY catalyst. So, the Ru samples are decomposed under vacuum using a slow heating rate (0.5 K s exp -1 ) up to 673 K in order to achieve higher metal dispersions. The characterization of these samples by H sub 2 and CO chemisorption is under progress.  However, much higher dispersion was found for most of the catalysts characterized to date than for those decomposed under flowing helium. 19  refs., 18 figs., 3 tabs. (ERA citation 10:025384)

REPORT  NUMBER: DOE/PC/60805-T6

CONTRACT  NUMBER: FG22-83PC60805