Question

Question 1 The carbon gasification (Boudouard) reaction, C+ CO2-2CO, is important to many extractive and refining processes as well as gasification of coal and biomass (wood or municipal waste) a) Make two charts of equilibrium gas composition as a function of temperature over the range 400°C to 1400°C; in the 1st use pco/P as the y-axis and in the 2nd log (pco/pco2); Assume P-poo + pc02-1 atm. and ac-1 b) By all appearances, CO gas is stable at room temperature. Is this in agreement with thermodynamics? If not explain why CO seems stable c) Consider the gasifier shown in the notes operating at 1000°C; pco + pco2 ~ 0.25 atm. At this temperature the gasification reaction is very fast. What does this imply for the actual exit gas composition relative to the equilibrium? Assuming the exit gas is at equilibrium would pco/P be greater than or less than that calculated in part (i)? Justify your answer d) A reactor at 1000°C; 1 atm. contains the equilibrium CO-CO2 mixture calculated in part (i) Steel containing carbon at ac 0.02 is placed in the reactor. Would the steel tend to decarburize (lose carbon) or recarburize (gain carbon)? e) While surfing the net you see an offer to buy shares in Point Grey Aluminum, a new company planning to extract Al from Al203 at 1400°C by the reaction log K =-7.554 The process will operate at P pcoPco2 1 atnm Should you hand over your $$? Why or why not? Reaction 1' (J/mole) -112,877 394,762 AS° (J/mole-°K) 86.514 0.836 C0.5O,-CO Summary of Thermodynamic Data

You don't need to do the Excel work but please show me how to do each parts (sample calculation will help me a lot).

Thanks!

Answer 1

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