2002 Volume 81 Issue 9 Pages 845-853
The price of product oil is influenced by the costs of hydrogen and utility (power) supplied to the coal liquefaction plant, in which there are many choices for processes, raw materials and fuels. In this study, it is presumed that the coal liquefaction plant is located in the coal production area and the natural gas is not available. Furthermore, as the hydrogen production process, the steam reforming of the off-gas produced from the coal liquefaction plant and the gasification of raw coal and residue were selected. The boiler turbine generator (BTG) and integrated coal gasification combined cycle (IGCC) were selected for power generation.
By using Linear Programming (LP) techniques, the production costs of hydrogen and power were minimized in the combination of these production processes for the coal liquefaction plant. As a result of this LP study, the capital cost and production cost were reduced by introducing the steam reforming of off-gas along with the gasification of raw coal and residue, and were minimized at BTG in comparison with IGCC. It is expected that technical improvement of IGCC in future would lead to cost reduction of coal liquefaction.