TITLE: ASPEN Modeling of the Tri-State Indirect-Liquefaction Process.

AUTHOR: R. E. Barker;   J. M. Begovich;   J. H. Clinton;   P. J. Johnson.

INST.  AUTHOR: Oak Ridge National Lab., TN.

SPONSOR: Department of Energy, Washington, DC.


PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Oct 83,  69p.


The ASPEN process simulator has been used to model an indirect-liquefaction flowsheet patterned after that of the Tri-State project. This flowsheet uses Lurgi moving-bed gasification with synthesis-gas conversion to methanol folowed by further processing to gasoline using the Mobil MTG process. Models developed in this study include the following: Lurgi gasifier, Texaco gasifier, synthesis gas cooling, Rectisol, methanol synthesis, methanol-to-gasoline, CO-shift, methanation, and naphtha hydrotreating. These models have been successfully developed in modular form so that they can be used to simulate a number of different flowsheets or process alternatives.  Simulations of the Tri-State flowsheet have been made using two different coal-feed rates and two types of feed coal. The overall simulation model was adjusted to match the Tri-State flowsheet values for methanol, LPG,  isobutane, and gasoline. As a result of this adjustment, the MTG reactor yield structure necessary to match the flowsheet product rates was determined. The models were exercised at different flow rates and were unaffected by such changes, demonstrating their range of operability. The use of Illinois No. 6 coal, with its lower ash content, resulted in slightly higher production rates of each of the products as compared to use of the Kentucky coal. (ERA citation 08:055385)