TITLE: Slurry Fischer-Tropsch/Mobil Two Stage Process of Converting SYNGAS to High Octane Gasoline. Final Report.

AUTHOR: J. C. W. Kuo.

INST.  AUTHOR: Mobil Research and Development Corp., Paulsboro, NJ.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Jun 83,  326p.

NTIS ORDER NO.: DE84004411/INW

ABSTRACT:

An evaluation study was conducted on a novel two-stage slurry Fischer-Tropsch/ZSM-5 process for converting low H sub 2 /CO ratio synthesis gas, which can generally be obtained from highly efficient, advanced coal-gasification systems, into high quality gasoline. The feasibility of this two-stage technology was successfully demonstrated in a newly designed and constructed bench-scale unit (BSU), consisting of a slurry bubble column reactor followed by a fixed-bed ZSM-5 reactor. Three Fischer-Tropsch catalysts of Fe/Cu/K sub 2 CO sub 3 type were evaluated.  Total hydrocarbon production as high as 815 g/gFe was achieved, which is substantially better than other results reported in the literature.  Methane + ethane yields ranged from 2 to 18 wt % of total hydrocarbons produced, with reactor-wax (those heavy hydrocarbons retained in the slurry reactor under reaction conditions) yields ranging from 3 to 85 wt %. Other investigations of the first-stage operation included process variable and hydrodynamic studies. The second-stage ZSM-5 reactor performed smoothly and demonstrated the conversion of Fischer-Tropsch products into high quality gasoline. The gasoline yields, including the alkylate and excluding the reactor-wax and light paraffins in the feed to the second-stage reactor, were as high as 87 wt %. The raw gasoline samples had satisfactory stability properties. A conceptual process design and scoping cost estimate for a battery-limit commercial plant to produce 27,000 BPSD gasoline from clean synthesis gas was conducted. The estimated cost is $700 million in terms of 1983 dollars at a Wyoming location. (ERA citation 09:032786)

REPORT  NUMBER: DOE/PC/30022-10

CONTRACT  NUMBER: AC22-80PC30022