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Values of K1>1J3 and KJ,n5 can deviate significantly from
Chapter 13, Problem 13.17(choose chapter or problem)
Values of K1>1J3 and KJ,n5 can deviate significantly from unity; typical values for KJ,1J3 range from 0.7 to 0.9 at a pressure of 7.5 MPa and typical MSR temperatures from 200C to 320C, while values for KJ,135 range from 0.8 to 0.95. Estimates of K1>i may be obtained from an equation of state, but such calculations are beyond the scope of the present discussion. 10 Furthermore, computational alternatives often require a choice between simplified and more realistic, but complex. models. An instance that illustrates this situation is estimation of K1>13.3 and K1>135 for use in determining reaction equilibrium constants. (a) What physical model is invoked if it is assumed that KJ,13J = K1>135 = La? (b) In the calculations of 13.15, KJ,13J and K1>135 were taken to be 1.0. Determine the significance of the ideal gas assumptions by reestimating the conversions of CO and Hz first with KJ,133 = 0.7 and K1>135 = 1.0, then with K1>133 = 1.0 and K1>13.5 = 0.8, and finally with KJ,1J3 = 0.7 and KJ,135 = 0.8. (c) From the preceding parts of this problem, what would be your decision (and why?) regarding inclusion of methods to estimate Km and K1>135 in the process analysis?
Questions & Answers
QUESTION:
Values of K1>1J3 and KJ,n5 can deviate significantly from unity; typical values for KJ,1J3 range from 0.7 to 0.9 at a pressure of 7.5 MPa and typical MSR temperatures from 200C to 320C, while values for KJ,135 range from 0.8 to 0.95. Estimates of K1>i may be obtained from an equation of state, but such calculations are beyond the scope of the present discussion. 10 Furthermore, computational alternatives often require a choice between simplified and more realistic, but complex. models. An instance that illustrates this situation is estimation of K1>13.3 and K1>135 for use in determining reaction equilibrium constants. (a) What physical model is invoked if it is assumed that KJ,13J = K1>135 = La? (b) In the calculations of 13.15, KJ,13J and K1>135 were taken to be 1.0. Determine the significance of the ideal gas assumptions by reestimating the conversions of CO and Hz first with KJ,133 = 0.7 and K1>135 = 1.0, then with K1>133 = 1.0 and K1>13.5 = 0.8, and finally with KJ,1J3 = 0.7 and KJ,135 = 0.8. (c) From the preceding parts of this problem, what would be your decision (and why?) regarding inclusion of methods to estimate Km and K1>135 in the process analysis?
ANSWER:Step 1 of 25
(a)