skip to main content

Title: Interaction of carbon and sulfur on metal catalysts: Technical progress report

At high coverage, sulfur generally deactivates metal catalysts, but at low coverage, chemisorbed sulfur can have a more subtle effect on catalyst activity and selectivity. The general goal of the current project is to examine fundamental aspects of selective poisoning by fractional monolayers of chemisorbed sulfur on a variety of metal catalysts used for commercially important reactions such as hydrocarbon re-forming, light alkane steam re-forming, and hydrocarbon synthesis. Specific objectives of the research program are to experimentally measure as a function of coverage the influence of chemisorbed sulfur on the thermodynamics, reactivity, and structure of surface and bulk carbon occupying both dispersed and well-characterized metal catalyst surfaces. Special methods, such as reversible sulfur chemisorption on supported metals and temperature-programmed reaction (TPR) characterization of catalyst carbon, have been developed that are well suited to examining the interaction of sulfur and carbon on metal surfaces. New analytical instruments with greatly improved sensitivity have been recently developed and applied: a helium discharge ionization detector (DID) is being used with a gas recirculation thermodynamic system, and the surface analysis by laser ionization (SALI) technique is used with surface carbon segregation systems.
Authors:
;
Publication Date:
OSTI Identifier:
10118243
Report Number(s):
DOE/ER/13689--T2
ON: DE94005844; TRN: 94:001618
DOE Contract Number:
FG03-87ER13689
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 17 Feb 1989
Research Org:
SRI International, Menlo Park, CA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CATALYSTS; PROGRESS REPORT; POISONING; SURFACE PROPERTIES; CARBON; CHEMICAL REACTIONS; SULFUR; CHEMISORPTION; METALS; CATALYTIC EFFECTS; MEASURING INSTRUMENTS 400201; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES