Phenomenological kinetics of wood delignification: application of a time-dependent rate constant and a generalized severity parameter to pulping and correlation of pulp properties

摘要: Kraft delignification kinetics has been modelled on the basis of a first order decay process with time-dependent rate constant. A generalized severity parameter derived from this kinetic model, Roh, applied to describe lignin solubilization during alkaline (soda and Kraft) bisulphite pulping different wood species. The model succesfuly data sets available literature. Our approach combined main variables (temperature, time chemical load) into single parameter, which is then used as reaction ordinate map changes in composition physical properties. An extension initial formulation Roh made cover situations where catalytic system composed by two active species, process.