A triangular reaction network lumping three xylene isomers into a species is proposed for hydroisomerization of C8-aromatics and the corresponding kinetic model for an industrial reactor is also developed.The kinetic parameters are estimated by the traditional optimization method based on several sets of balanced plant data.Meanwhile

the model is simulated by large number of plant data at different operating conditions and a good agreement is obtained between the estimated and observed values.When compared with other models

the good performance of the proposed model is demonstrated in detail in terms of the indexes such as relative error

relative mean square error and parameter estimation time.