A Kinetic Model for the Isomerization of n-Butene to Isobutene

Discrimination of the Kinetic Models for Isomerization of n-Butene to Isobutene

“…We used a commercial software Sigma Plot ver 9.0 to perform the nonlinear regression and parameter fitting. Both yield ratio equations were employed to fit the data published by Choudhary and Doraiswamy (1975) at five different reaction temperatures from 300 to 435 • C. The results of comparing the experimental and the predicted yield ratios and r -square …”

“…The explicit reaction rate for the isomerization reaction can also be easily obtained by using the methodology to calculate the D ii terms. Choudhary and Doraiswamy (1975) and Raghavan and Doraiswamy (1977) proposed nine different Langmuir-Hinshelwood-type or empirical kinetic models for the system and concluded that different models should be used at different temperatures. The reactions for multi-step isobutene addition were ignored in their studies.…”

“…There has been a considerable interest in the production of isobutene from n-butene over different catalysts Doraiswamy, 1971, 1975;Raghavan and Doraiswamy, 1977;Gayubo et al, 1997;Byggningsbacka et al, 1999). In the past fifty years, there were some published literatures investigated on the kinetic modeling of isomerization of nbutene to isobutene over catalysts or zeolites (Choudhary and Doraiswamy, 1975;Gayubo et al, 1997;Byggningsbacka et al, 1999). Though the reaction system seems not very complex apparently, the real reaction mechanism is somehow complicated due to the heterogeneous catalytic reaction.…”

“…Choudhary and Doraiswamy (1975) studied the reaction over fluorinated η-alumina catalyst and compared one power-law equation and nine Langmuir-Hinshelwoodtype rate equations at different temperatures. However, there was no single suitable rate expression that can be used at various temperatures.…”

“…For illustrating the advantages of using the general rate equation method, two proposed mechanisms modified from the literature (Byggningsbacka et al, 1999) were used as examples to analyze the yield ratio and to identify the more suitable and reasonable mechanism. The experimental data from the published literature (Choudhary and Doraiswamy, 1975) were used as the test data in this study.…”