Ind. Eng. Chem. Res. 2007, 46, 7849-7850
7849
ADDITIONS AND CORRECTIONS Volume 46, Issue 2 Kinetics of the Reaction of Carbon Dioxide with Aqueous Solutions of 2-((2-Aminoethyl)amino)ethanol. Sholeh Ma’mun, Vishwas Y. Dindore, and Hallvard F. Svendsen*. Pages 385-394. In our original paper, an error was found in calculating the wetting rate Γ. The value of Γ will directly affect the modified Reynolds number and, therefore, the calculation of the liquid-side mass transfer coefficient kL, as written in eq 30. It further affects the observed reaction rate constant kobs and then other resulting constants. Therefore, the values in some of the figures, tables, and constants change, but they do not change the content of the text. To the readers, we apologize for the mistakes. The corrections to the paper are listed below and are to be taken as replacements of the figures, tables, and equations in the original paper. Page 389. Equation 30 and Figure 4 should appear as follows. kL D
) 18.3
(4Γµ ) (FDµ ) 1.0
0.5
(30)
Figure 4. Effect of liquid flow rate, in terms of modified Reynolds number, on the liquid-side mass-transfer coefficient.
Page 391. Table 2, Figures 8 and 9, and the parameters regarding eq 41 should appear as follows. Table 2. Comparison of the Second-Order Rate Constant k2 for Alkanolamines at 25 °C alkanolamine
k2, 25 °C (m3 kmol-1 s-1)
∆E (kJ kmol-1)
source
AEEA MEA DEA PZ
12300 7000 1200 53700
32200 17900 41800 33600
this work ref 30 ref 31 ref 32
Figure 8. Effect of AEEA concentration on kobs over a range of temperatures from 32 °C to 49 °C: (O) 32.1 °C, (0) 34.9 °C, (4) 39.6 °C, (]) 44.2 °C, and (×) 48.8 °C.
Figure 9. Variation of {kobs - kOH-[OH- ][AEEA]}/[AEEA]} with [AEEA] over a range of temperatures from 32 to 49 °C: (O) 32.1 °C, (0) 34.9 °C, (4) 39.6 °C, (]) 44.2 °C, and (×) 48.8 °C.
10.1021/ie071262d CCC: $37.00 © 2007 American Chemical Society Published on Web 10/12/2007
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Ind. Eng. Chem. Res., Vol. 46, No. 23, 2007
[
k2 ) k2, 25 °C exp -
1 ∆E 1 R T 298.15
(
)]
(41)
where k2, 25 °C ) 1.23 × 104 m3 kmol-1 s-1, ∆E ) 3.22 × 104 kJ kmol-1, and R ) 8.314 kJ kmol-1 K-1. Page 392. Figures 10 and 11, Tables 3 and 423, and eqs 43 and 44 should appear as follows.
Figure 11. Comparison of measured and predicted kobs obtained by the termolecular mechanism of the CO2-AEEA-H2O system: (O) this work and (0) from Bouhamra and Alper.28
Figure 10. Relationship between ln k and 1/T: (O) AEEA and (0) H2O.
Table 3. Reaction Rate Constants of AEEA and Those of Water T (°C)
kAEEA (m6 kmol-2 s-1)
kH2O (m6 kmol-2 s-1)
32.1 34.9 39.6 44.2 48.8
2758 3040 3533 4088 4697
241.8 274.9 335.6 407.9 492.2
Table 4. Reaction Rate Constant of AEEA and That of Water for the CO2-AEEA-H2O System, in Comparison to Those of PG and MEA Systems at 25 °C absorbent AEEA PG MEA
k (× 10-3/m6 kmol-2 s-1)
kH2O (m6 kmol-2 s-1)
C (kmol m-3)
source
2.17 2.09 1.71
175 118 73.7
1.19-3.46 0.10-4.00 0.19-5.50
this work ref 33 ref 27
(-3120 T ) -4170 ) 2.07 × 10 exp( T )
kAEEA ) 7.69 × 107 exp kH2O
IE071262D 10.1021/ie071262d Published on Web 10/12/2007
8
(43) (44)
