Solubilities of heavy fossil fuels in compressed gases. Calculation of dew points in tar-containing gas streams

Abstract

A molecular-thermodynamic model is used to establish a correlation for solubilities of heavy fossil fuels in dense gases (such as those from a coal gasifier) in the region from ambient to 100 bar and 600 K. This model is then applied to calculate dew points in tar-containing gas streams. Experimental solubility measurements have been made for 2 Lurgi coal-tar fractions in dry and moist methane. Calculated and experimental solubilities agree well. The correlation is used to establish a design-oriented computer program such as can be used for the design of a continuous-flow heat exchanger.