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- W101715974 abstract "The oxidative pretreatment of Illinois No. 6 coal has been studied in two types of reactors: a short residence time entrained-flow unit and a longer residence time fluidized-bed unit. The entrained reactor was operated at 40 atmospheres pressure and the fluidized-bed reactor was tested at both 40 and 70 atmospheres pressure. Material balances were constructed using the raw data gathered in both processes. The 70-atmosphere fluidized-bed and the entrained reactor experiments had closures of 95% or better, while a closure of 94% was calculated in the 40-atmosphere fluidized-bed test. Individual elemental balances varied, carbon and hydrogen recovery were excellent and oxygen recovery generally was the poorest. Typical material balances that can be used for design calculations were generated from the data. Energy balances based on these material balances indicated that the fluidized-bed reactor was operated at almost total adiabatic conditions. Some heat loss was seen in the entrained reactor and linked to the cooling of the process stream at the end of the reactor to protect the char receiver. Both pretreatment schemes were successful in destroying a large portion of the coal's agglomerating tendencies, as indicated by the free swelling index of the treated coal samples. Tar formation in themore » entraned reactor was found to be negligible. In the fluidized-bed reactor, 1 to 5% of the feed coal was converted to tar compounds. The work completed and described should prove useful in providing an accurate description of input feed compositions to the gasifier which would be encountered in gasifying caking coals.« less" @default.
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- W101715974 date "1978-09-10" @default.
- W101715974 modified "2023-09-23" @default.
- W101715974 title "Oxidative pretreatment of Illinois No. 6 coal: material and energy balances" @default.
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