Solvent Refined Coal (SRC) Process. Research and Development Report No. 53. Interim Report No. 23, 1976--1977. Development of a Process for Producing an Ashless, Low-Sulfur Fuel from Coal. Volume IV. Product Studies. Part 11. Processing of Solvent Refined Coal Minerals

摘要

The solvent refining process of Pittsburgh and Midway Coal Mining Company for coal cleaning results in a residue termed coal mineral. This residue contains essentially all the ash and inorganic sulfur of the original coal plus some organic sulfur and undissolved carbon. The carbon content varies from 20% to 60% depending on the severity of treatment in the refining process. Coarse coal mineral from Kentucky No. 9 coal containing about 30% carbon were gasified with steam at 1150 exp 0 C and 1340 exp 0 C in a 4-inch batch fluidized bed reactor. Product gases consisted chiefly of hydrogen, carbon monoxide and carbon dioxide. Usually during the first 60 minutes of gasification, carbon monoxide was produced in greater quantities than carbon dioxide. Thereafter, the carbon dioxide content increased significantly. Use of coarse mineral and a high ash content in them caused quicker appearance and increased quantities of carbon dioxide during gasification. Carbon conversions exceeding 90% were achieved at 1150 exp 0 C with gasification times exceeding 2 1/2 hours. The same conversion was achieved in 1 1/2 hours at 1340 exp 0 C. (ERA citation 04:038073)