1880
Znd. Eng. Chem. Res. 1994,33, 1880
ADDITIONS AND CORRECTIONS Volume 32, Number 1
Kinetics of Toluene Disproportionation over Unmodified and Modified ZSM-5 Zeolites. Maria A. Uguina,' Jose L. Sotelo, and David P. Serrano Page 52. Equation 3 should read
Volume 33, Number 1
Modeling Reaction Quench Times in the Waste Heat Boiler of a Claus Plant. Linda V. Nasato, Kunal Karan, Ani1 K. Mehrotra, and Leo A. Behie' Page 9. In eqs 17-23, the rate constants (kl and k 2 ) for the Hz-Sz reassociation reaction (eq 17) and the C 0 - s ~ reaction (eq 20) were incorrectly denoted by the same symbols. Equations 20-23 should be corrected as (-rCO)
= k3cC0cS,
- k4CCOS
k4 = 9.15 X K
k3/k, = e(22Ed%36"J/RT
(-rCo) = k3(CcoCsp- Cc,$K)
(20) (21) (22)
(23)
where ka and k4 are in m3/(kmol.s) and s-l, respectively, Cco, Cs,, and Ccos are in kmoVm3,and (-reo) is in kmol/ (m3& The value of gas constant, R, in eqs 21 and 22, as well as in eqs 18and 19of our paper, is 1.987 cal/(gmol.K).
