Evaluation of Ceramic Tubes, Joints, and Seals for High Pressure Heat Exchange Systems. Annual Report, September 1, 1991-August 31, 1992

摘要

Silicon carbide containing ceramics have been evaluated for their use as reactor tubes in a steam-methane reformer being developed by Stone & Webster. Screening tests, using ceramic coupons exposed to simulated syngas mixtures at up to 1900 F, have shown that at high temperatures, steam partial pressure is an important parameter in the extent of steam attack of the silicon carbide. However, there are operating conditions, e.g. steam partial pressures below 60 PSIA, which will minimize the extent of silicon carbide attack. Further testing of coupons and tubular shapes is planned at Oak Ridge National Laboratory and at the Center for Advanced Materials at Pennsylvania State University.