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- W117043919 abstract "A theoretical and experimental analysis of chemical and corrosion phenomena which might occur in clean gas saturators of coal gasification combined cycle power plants has been carried out. The theoretical study involved thermodynamic calculation of the composition of the CO/CO/sub 2//CH/sub 4//H/sub 2//H/sub 2/S/H/sub 2/O system as a function of temperature and pressure in order to estimate the theoretical yield of formic acid in a typical clean gas saturator environment. These calculations suggest that the theoretical formic acid yield could be in excess of 20,000 ppM, whereas a maximum of only approx. 70 ppM was found to form in the model saturator employed in the experimental part of this program. The low actual yield is consistent with previous findings reported in the literature, which indicate that the direct reaction of carbon monoxide with water is kinetically slow. Corrosion rates for various candidate structural alloys were also measured in three runs carried out in the experimental program. The environments employed in these experiments and the exposure times were as follows: run 1 - boiler water; Run 2 - boiler water + 0.22 ppM H/sub 2/S; Run 3 - boiler water + 500 ppM Cl/sup -/ + 240 ppM S/sup 2 -/.more » In all three runs, corrosion rates of less than 10 ..mu..m/year were found for Type 316 SS, Type 316L SS, Type 304 SS, Type 304L SS, 3 RE60, AL-6X, Ferralium 255, and Titanium 35A. Type 430 SS exhibited corrosion rates between 10.9 and 31.7 ..mu..m/year, whereas Inconel 600 yielded a corrosion rate in excess of 100 ..mu..m/year in the high-sulfide environment (Run 3). As expected, the highest corrosion rate was exhibited by carbon steel, for which corrosion rates as high as 1500 ..mu..m/year were found for specimens exposed at the top of the saturator in Run 3. Finally, no evidence of stress corrosion cracking was obtained for any of the materials studied. 79 references, 9 figures, 26 tables.« less" @default.
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- W117043919 date "1985-02-01" @default.
- W117043919 modified "2023-09-27" @default.
- W117043919 title "Acid corrosion in a simulated clean-gas saturator of a coal gasifier. Final report" @default.
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