TITLE: Metallic Glasses as New Catalyst Systems for Energy Conversion: Final Report.

AUTHOR: W. E. Brower;   G. V. Smith.

INST.  AUTHOR: Southern Illinois Univ. at Carbondale.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  1987,  87p.

NTIS ORDER NO.: DE87007753/INW

ABSTRACT:

Pd-Si metallic glasses have been utilized as catalysts in the Fischer-Tropsch reaction. The glasses are selective of ethane, whereas the in-situ crystallized glasses select a range of hydrocarbons characteristic of conventional Pd catalysts. This shift in selectivity has been observed in other hydrogenation reactions. Surface crystallization caused by the reaction conditions causes variable selectivity. Crystallization in reaction conditions has been monitored by DSC. During the course of the grant we developed the use of (+)- apopinene (6,6-dimethyl-1R,5R-bicyclo(3.1.1)hept-2-ene) as a molecular probe for determining the number and kinds of active sites on metallic glass catalysts. To accomplish this we conducted many experiments for comparison on other types of catalysts. These were foils, powders, and highly dispersed metals on several different supports. The glassy surfaces appear to be three dimensionally random (hilly or rolling) with many protuberances which crystallize into staircases of steps and kinks. 94 refs., 29 figs., 5 tabs. (ERA citation 12:025382)

CONTRACT  NUMBER: FG02-84ER45122

ANNOUNCEMENT: 8718