Kinetics of Reductive Alkylation of p-Phenylenediamine with Methyl Ethyl Ketone Using 3% Pt/Al2O3 Catalyst in a Slurry Reactor
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- 作者：Narendra G. Patil ; Debdut Roy ; Amit S. Chaudhari ; Raghunath V. Chaudhari
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：May 9, 2007
- 年：2007
- 卷：46
- 期：10
- 页码：3243 - 3254
- 全文大小：239K
- 年卷期：v.46,no.10(May 9, 2007)
- ISSN：1520-5045
文摘
Intrinsic kinetics of reductive alkylation of p-phenylenediamine (PPDA) with methyl ethyl ketone (MEK)using 3% Pt/Al2O3 catalyst was studied in a slurry reactor. The overall reaction involves a combination ofparallel and consecutive reactions involving equilibrium noncatalytic (homogeneous) and catalytic (heterogeneous) steps. For the purpose of kinetic modeling, the effects of PPDA concentration, catalyst loading,agitation speed, and partial pressure of hydrogen were studied in a temperature range of 373-413 K.Quantitative criteria were used to ensure that the reaction occurred in the kinetic regime. Different rate equationshave been considered based on the elementary steps involving catalytic and noncatalytic reactions, which laystress on the different types of interactions occurring between the reactants and the active catalyst sites. Thebest-fit rate model has been proposed by rigorous optimization and model discrimination procedures, bysimulating the experimental concentration-time data. For the best-fit model, the agreement between thepredicted and experimental data was found to be very good over a wide range of operating conditions.