Kinetic studies on the dimerization of isobutene with Ni/Al2O3 as a catalyst for reactive distillation process

doi:10.1016/j.cjche.2014.03.004

›› 2015, Vol. 23 ›› Issue (3): 520-527.DOI: 10.1016/j.cjche.2014.03.004

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Kinetic studies on the dimerization of isobutene with Ni/Al₂O₃ as a catalyst for reactive distillation process

Liwei Tong¹, Lifang Chen¹, Yinmei Ye², Zhiwen Qi¹

1 Max Planck Partner Group at the State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2013-09-19 Revised:2014-03-16 Online:2015-04-03 Published:2015-03-28
Supported by:
Supported by the State key Development Program for Basic Research of China (2012CB720502), the National High Technology Research and Development (2012AA040306), the National Natural Science Foundation of China (21076074), and the Shanghai Pujiang Talents Program (10PJ1402400).

Kinetic studies on the dimerization of isobutene with Ni/Al₂O₃ as a catalyst for reactive distillation process

Liwei Tong¹, Lifang Chen¹, Yinmei Ye², Zhiwen Qi¹

1 Max Planck Partner Group at the State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

通讯作者: Zhiwen Qi
基金资助:
Supported by the State key Development Program for Basic Research of China (2012CB720502), the National High Technology Research and Development (2012AA040306), the National Natural Science Foundation of China (21076074), and the Shanghai Pujiang Talents Program (10PJ1402400).

Abstract

Abstract: Isooctane is a promising gasoline additive that could be produced by dimerization of isobutene (IB) with subsequent hydrogenation. In this work, the dimerization of IB has been carried out in a batch reactor over a temperature range of 338-383 K in the presence of laboratory prepared Ni/Al₂O₃ as a catalyst and n-pentane as solvent. The influence of various parameters such as temperature, catalyst loading and initial concentration of IB was examined. A Langmuir-Hinshelwood kinetic model of IB dimerization was established and the parameters were estimated on the basis of the measured data. The feasibility of oligomerization of IB based on the reactive distillation was simulated in ASPEN PLUS using the kinetics developed. The simulation results showed that the catalyst of Ni/Al₂O₃ had higher selectivity to diisobutene (DIB) and slightly lower conversion of IB than ion exchange resin in the absence of polar substances.

Key words: Isobutene, Oligomerization, Catalyst, Kinetic modeling, Reactive distillation

摘要： Isooctane is a promising gasoline additive that could be produced by dimerization of isobutene (IB) with subsequent hydrogenation. In this work, the dimerization of IB has been carried out in a batch reactor over a temperature range of 338-383 K in the presence of laboratory prepared Ni/Al₂O₃ as a catalyst and n-pentane as solvent. The influence of various parameters such as temperature, catalyst loading and initial concentration of IB was examined. A Langmuir-Hinshelwood kinetic model of IB dimerization was established and the parameters were estimated on the basis of the measured data. The feasibility of oligomerization of IB based on the reactive distillation was simulated in ASPEN PLUS using the kinetics developed. The simulation results showed that the catalyst of Ni/Al₂O₃ had higher selectivity to diisobutene (DIB) and slightly lower conversion of IB than ion exchange resin in the absence of polar substances.

关键词: Isobutene, Oligomerization, Catalyst, Kinetic modeling, Reactive distillation

Liwei Tong, Lifang Chen, Yinmei Ye, Zhiwen Qi. Kinetic studies on the dimerization of isobutene with Ni/Al₂O₃ as a catalyst for reactive distillation process[J]. , 2015, 23(3): 520-527.

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Kinetic studies on the dimerization of isobutene with Ni/Al₂O₃ as a catalyst for reactive distillation process

Kinetic studies on the dimerization of isobutene with Ni/Al₂O₃ as a catalyst for reactive distillation process

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