Premium
Porosity effects on catalytic char oxidation. Part II: Experimental results
Author(s) -
Su J. L.,
Perlmutter D. D.
Publication year - 1985
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690310613
Subject(s) - catalysis , activation energy , chemistry , porosity , char , isothermal process , kinetics , context (archaeology) , kinetic energy , chemical engineering , reaction rate , thermodynamics , organic chemistry , physics , paleontology , quantum mechanics , biology , engineering , combustion
Oxidation rates of Na 2 CO 3 ‐ and K 2 CO 3 ‐impregnated char samples were measured in an isothermal kinetic control regime. The results were analyzed by a previously developed model to extract the intrinsic catalytic reactivities, freed from superimposed noncatalytic and structural effects. Although the overall catalyzed rates are only several times greater than their uncatalyzed counterparts, the intrinsic catalytic rates were found to be four orders of magnitude greater. The results further indicate that the function of the catalyst is to increase the number of active sites without affecting the activation energy. The overall reaction kinetics are demonstrated to contain the combined contributions of both catalytic and noncatalytic reactions, and in this context the effects of multiple catalysts as well as of the pore structure development during reaction can be understood and interpreted.