期刊
AICHE JOURNAL
卷 54, 期 8, 页码 2145-2154出版社
WILEY
DOI: 10.1002/aic.11540
关键词
one-step or single tranformations; approximations; kinetic model; Kissinger method; thermal analysis
We develop a method,lor obtaining the approvimate solwionj r the evolution qf single-stcl) transf rniations unde)- nonisothermal conditions. We have applied it to manY reaction models and obtained very simple analytical e.vpressions for the shape of the corresponding transfbi-mation rate peaks. These analytical..olutions repi-esent a significant simplification oj'the system's description allowing easy cta-vefitting to e.yperiment. A remarkable property is that the evolutions of the translormed fi-action obtained at cl ffi,rent heating rates are identical when time is scaled by a time constant. The accura c), achieved with our method is checked against several reaciion models and d ff,rent temperature dependencies of the transfoi-mation rate constant. It is shown that its accuracy is closclY related with that of the Kissinger method. (c) 2008 American Institute of Chemical Engineers.
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