Elementary Principles 403 - 9.38 a. Any C consumed in...

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9- 51 9.38 a. b. Any C consumed in reaction (2) is lost to reaction (1). Without the energy released by reaction (2) to compensate for the energy consumed by reaction (1), the temperature in the adiabatic reactor and hence the reaction rate would drop. Basis : 1.00 kg coal fed (+0.500 kg H 2 0) 0.500 kg H20 1.0 kg coal 0.105 kg H 2 O/kg coal 0.226 kg ash/kg coal 0669 . kg combustible / kg coal 0.812 kg C / kg combustible 0.134 kg O / kg combustible 0.054 kg H / kg combustible R S | | T | | U V | | W | | n n n n f f f f 1 2 3 3 3 4 56 3577 = [ (1.00)(0.669)(0.812) kg C][1 mol C /12.01 10 kg] = 45.23 mol C = (1.00)(0.669)(0.134) /16.0 10 mol O = (1.00)(0.669)(0.054) /1.01 10 mol H = [ (0.500 + 0.105) kg][1 mol H O /18.016 10 kg] = 33.58 mol H O 3 2 3 2 × ×= × . . n 0 (mol O 2 ) 25 ° C Product gas at 2500 ° C 1 kg coal + H 2 O, 25 ° C 0 2 00 2 Reactive oxygen (O) available (2 5.60) mol O 35.77 mol H 1 mol O
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