TITLE: Magnetic character investigation of higher alcohol synthesis Cu-Co-Cr catalysts.

AUTHOR: U. A. Donatto;   T. L. Hoard;   A. N. Murty.

INST.  AUTHOR: Grambling State Univ., LA. Dept. of Physics.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1992,  10p.

NTIS ORDER NO.: DE93009732INW

NOTES: National Science Foundation (NSF) conference on diversity in the scientific and technological work force, Washington, DC (United States), 24-27 Sep 1992. Sponsored by Department of Energy, Washington, DC.

ABSTRACT:

The selectivity and conversion efficiency of the catalyst are reported to be governed by inter-metallic ratios of the three elements. High yields of methanol in copper-rich field, hydrocarbons in cobalt-rich field and mixed alcohols in the intermediate range were observed. The basic mechanism, the extent and effect of inter-metallic interactions, or the role and function of chromium still remain unclear. To examine the correspondence between the catalytic and magnetic % behavior of the catalyst, we have investigated the Zero-field Nuclear Magnetic Resonance spectra and Hysteresis character of a series of Cu/Co/Cr trimetallics with Cu/Co ratio varying from 0.2 to 8.0. The magnetic moment of the catalyst system is very low for Cu/Co < 1.5, dramatically increases when 1.5 < Cu/Co < 5.0 and drops for Cu/Co > 5.0. The NMR results indicate that chromium serves as a support and inhibits any strong intermetallic interaction between copper and cobalt.

REPORT  NUMBER: CONF-9209330-1

CONTRACT  NUMBER: FG22-89PC89762