Solvent Refined Coal (SRC) Process: Development of a Process for Producing an Ashless, Low-Sulfur Fuel from Coal. Research and Development Report No. 53, Interim Report No. 20. Volume IV. Product Studies. Part II. Processing of Coal Minerals for the Period 1975--1976

摘要

The solvent refined process for coal liquefaction results in a residue, termed coal minerals, containing approximately 50% carbon and the remainder mineral material. Silica, alumina, iron, and sulfur (pyrites) make up the majority of the minerals. The gasification of the carbon as fuel and the recovery of iron and sulfur are the main concern of this study. Pulverized coal minerals from Kentucky No. 9 coal were gasified with water between 1037 and 1180 exp 0 C in a batch fluidized bed reactor. The minerals were presoaked in aqueous solutions of either NaOH or Na sub 2 CO sub 3 and air dried. Product gases consisted chiefly of hydrogen, carbon monoxide, and carbon dioxide. Sulfur (from pyrites) formed hydrogen sulfide gas and the iron was reduced at the same time. A kinetic model was used to determine the rate-controlling step for the carbon-steam and iron reduction reactions. (ERA citation 04:005042)