300
Ind. Eng. Chem. Fundam., Vol. 18, No. 3, 1979
Acknowledgment We thank Professors Robert J. Good and Sol W. Weller for their comments and discussions. The experimental work was performed at Brookhaven National Laboratory, Upton, N.Y. 11973. Literature Cited Gan, H., Nandi, S. P., Walker, P. L., Jr., Fuel, 51, 572 (1972). Walker, P. L., Jr., Klni, K. A,, Fuel, 44, 453 (1965). Yang, R. T., Liu, R. T., Steinberg, M., I d . fng,Chem. Fundam., 16, 486 (1977). Zwietering, P., van Krevelen, D. W., Fuel, 33, 331 (1954). PRESSURE.
SM HC
Figure 4. Adsorption and desorption of CHI on the PSOC-197 coal at 27 “C.
isosteric heats of adsorption, discussion on the nature of the preferential adsorption of CHI on the PSOC-197 coal beyond this point would be premature. Further work is in progress for obtaining an understanding of this phenomenon. The results will be used in the development of new techniques for separation of CHI and H2in coal conversion processes.
Department o f Chemical Engineering State University of New York at Buffalo Amherst, New York 14260 State University of New York at Stony Brook Stony Brook, New York 11780
Ralph T. Yang*
Rei T. Liu
Received for review September 27, 1978 Accepted April 12, 1979
CORRECTIONS
In the article, “Effect of Nonuniform Activity Distribution on Catalyzed Gas-Solid Reactions”, by G. L. Guzman and E. E. Wolf [Znd.Eng. Chem. Fundam., 18, 7 (1979)] there is a term missing in eq 18 on page 9. Equation 18 should read
In the article, “Mixture Adsorption Equilibria of Ethane and Ethylene on 13X Molecular Sieves”, by R. P. Danner and E. C. F. Choi [Ind. Eng. Chem. Fundam., 17, 248 (1978)l in Figures 5 and 6 the lines for the two-dimensional gas model and statistical thermo model have been reversed. Also, Table VI should be extended as follows. ethane concn ethylene concn total vel. adsorbed vapor adsorbed vapor adsorbed phase, cm3 run phase, phase, phase, mol % mol % STP/g no. mol % mol % 3.3 44.5 24.9 7 75.1 96.7 15.8 48.4 57.4 84.2 8 42.6 2.7 43.9 97.3 23.2 9 76.8
