石炭液化技術における腐食の問題

抄録

Corrosion and erosion problems appear to be encountered in the coal liquefaction processes are briefly reviewed referring to the open literature. Corrosion and erosion have been the major cause of troubles experienced in the operating liquefaction pilot plants in the U. S. A. and therefore have to be overcome primarily. Possible corrosion modes may encompass sulphidation, stress corrosion cracking, naphthenic acid corrosion etc., depending upon the site in the plant. Erosion or erosion/corrosion is the other annoying problem in almost all the components which process solid particle laiden fluid. However, the environment may be very complex and its precise conditions are still to be clarified. Although profound knowledge accumulated in the oil refinery technology can be used to solve, especially, corrosion problems, further effort may be necessary to evaluate materials taking account of the conditions specifically of coal liquefaction.