ABSTRACT
Research on the transformations of inorganic components under entrained-flow gasification conditions is substantially aided by two investigative techniques: 1) an advanced analytical procedure called scanning electron microscopy point count (SEMPC) and 2) testing under gasification conditions in a bench-scale, entrained-flow, pressurized drop-tube furnace (PDTF). This combination of tools enhances studies of ashes, slags, and deposits produced under controlled gasification conditions by providing identification of intermediate inorganic species. The recognition of reduced inorganic species is assisted by recent developments in electron microscope computer automation and enhanced light-element x-ray detectors that enable the quantification of oxygen. In the current PDTF design, carbon conversion is greater than 98% at conditions of 1500°C, 150 psi, and an oxygen-to-carbon (O/C) ratio of 1.5. Significant progress is being made toward the understanding of inorganic transformations under gasification conditions through the use of these techniques.
