Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement

CIESC Journal ›› 2011, Vol. 19 ›› Issue (3): 371-379.

Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement

Andreas Harwardt, Korbinian Kraemer, Bettina Rüngeler, Wolfgang Marquardt

Aachener Verfahrenstechnik-Process Systems Engineering, RWTH Aachen University, Germany

收稿日期:2010-08-09 修回日期:2011-04-09 出版日期:2011-06-28 发布日期:2011-06-28
通讯作者: Andreas Harwardt, E-mail: Andreas.Harwardt@avt.rwth-aachen.de
基金资助:
Work originally presented on the 2nd Int. Symp. Sustainable Chemical Product and Process Engineering, held at Hangzhou, China from May 9 to 12, 2010

Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement

Andreas Harwardt, Korbinian Kraemer, Bettina Rüngeler, Wolfgang Marquardt

Aachener Verfahrenstechnik-Process Systems Engineering, RWTH Aachen University, Germany

Received:2010-08-09 Revised:2011-04-09 Online:2011-06-28 Published:2011-06-28
Supported by:
Work originally presented on the 2nd Int. Symp. Sustainable Chemical Product and Process Engineering, held at Hangzhou, China from May 9 to 12, 2010

摘要/Abstract

摘要： Butyl-levulinate has been identified as a promising fuel candidate with high oxygen content. Its combustion in diesel engines yields very low soot and NO_x emissions. It can be produced by the esterification of butanol and levulinic acid, which themselves are platform chemicals in a biorenewables-based chemical supply chain. Since the equilibrium of esterification limits the conversion in a conventional reactor, reactive distillation can be applied to overcome this limitation. The presence of the high-boiling catalyst sulfuric acid requires a further separation step downstream of the reactive distillation column to recover the catalyst for recycle. Optimal design specifications and an optimal operating point are determined using rigorous flowsheet optimization. The challenging optimization problem is solved by a favorable initialization strategy and continuous reformulation. The design identified has the potential to produce a renewable transportation fuel at reasonable cost.

关键词: biofuels, conceptual design, reactive distillation, butyl-levulinate, mixed-integer nonlinear problems, continuous reformulation, process optimization, process intensification

Abstract: Butyl-levulinate has been identified as a promising fuel candidate with high oxygen content. Its combustion in diesel engines yields very low soot and NO_x emissions. It can be produced by the esterification of butanol and levulinic acid, which themselves are platform chemicals in a biorenewables-based chemical supply chain. Since the equilibrium of esterification limits the conversion in a conventional reactor, reactive distillation can be applied to overcome this limitation. The presence of the high-boiling catalyst sulfuric acid requires a further separation step downstream of the reactive distillation column to recover the catalyst for recycle. Optimal design specifications and an optimal operating point are determined using rigorous flowsheet optimization. The challenging optimization problem is solved by a favorable initialization strategy and continuous reformulation. The design identified has the potential to produce a renewable transportation fuel at reasonable cost.

Key words: biofuels, conceptual design, reactive distillation, butyl-levulinate, mixed-integer nonlinear problems, continuous reformulation, process optimization, process intensification

Andreas Harwardt, Korbinian Kraemer, Bettina Rüngeler, Wolfgang Marquardt. Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement[J]. CIESC Journal, 2011, 19(3): 371-379.

Andreas Harwardt, Korbinian Kraemer, Bettina Rüngeler, Wolfgang Marquardt. Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement[J]. , 2011, 19(3): 371-379.

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Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement

Conceptual Design of a Butyl-levulinate Reactive Distillation Process by Incremental Refinement

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