TITLE: Synthesis of octane enhancers during slurry-phase Fischer-Tropsch.  Quarterly technical progress report No. 8, July 1, 1992--September 30, 1992.

AUTHOR: G. Marcelin.

INST.  AUTHOR: Altamira Instruments, Inc., Pittsburgh, PA.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  7 Jul 93,  30p.

NTIS ORDER NO.: DE94002178INW

ABSTRACT:

The initial work on the synthesis of MTBE during CO hydrogenation shows that MTBE cannot be formed directly on metal sites and likely requires the presence of an acid site. However, MTBE can be made successfully when an acid site, provided by the zeolites, is present in the vicinity of the methanol-synthesis metal sites. When i-butylene was added during CO hydrogenation over a composite catalyst consisting of Li-Pd/SiO(sub 2) and a hydrogen-zeolite, MTBE was formed in measurable amounts. The major by-product of this reaction scheme was isobutane and the dimer of i-butylene. In general, ZSM-5 was found to be superior to LZ210-12 HY. CO hydrogenation over a bifunctional PdNaY catalyst shows that branched hydrocarbons as well as MEOH can be made successfully at the same time. Addition of i-butylene over this catalyst only (i.e. without other zeolite) results in the formation of trace amounts of MTBE.

REPORT  NUMBER: DOE/PC/90047-T8

CONTRACT  NUMBER: AC22-90PC90047