清华化工论坛第五十一讲 Process Intensification in Carbon Capture

发布时间:2018-03-19

报告题目:Process Intensification in Carbon Capture

报告人: Prof. Andrzej Górak TU Dortmund University

报告时间: 3月19日, 14:00~15:30

报告地点: 英士楼201会议室

 

Professor Andrzej Górak studied chemistry at the Technical University of Lodz in Poland. He obtained his Ph.D. from the Faculty of Process Engineering in 1979. He worked at the same faculty as senior researcher until 1988. The following four years he spent as a researcher at Henkel KGaA in Düsseldorf. Having completed his “habilitation” at RWTH Aachen in 1989 and at Technical University Warsaw in 1990, Andrzej Górak became professor at the chair of fluid separation processes at TU Dortmund University in 1992. In 1996 he took over the chair of fluid separation processes at the University of Essen. Four years later, in 2000, he returned to TU Dortmund University to become the head of Laboratory of Fluid Separations. Apart from this, he has been full professor at the Technical University of Lodz since 2003.

The scientific activities of Professor Andrzej Górak are focused on the computer aided simulation and experimental validation of intensified processes like integrated reaction and separation processes, reactive distillation and reactive absorption as well as on the analysis of hybrid separation processes and the purification of biotechnological products. Professor Górak is an editor of the journal "Chemical Engineering and Processing: Process Intensification“. He was awarded the Federal Cross of Merit of the Federal Republic of Germany and Republic Poland. In 2014 he was also awarded by DECHEMA and Verein Deutscher Ingenieure with Kirschbaum‐Medaille for his outstanding achievements in fluid separations. He is editor of the series of three books on distillation (2014), which was awarded 2015 with the PROSE award in the category "chemistry and physics". He is one of the founders of European Process Intensification Centre (Europic), together with Prof. A.Stankiewicz (Delft) and Prof. Ch. Gourdon (Toulouse).

 

Process Intensification in Carbon Capture

Andrzej Górak, TU Dortmund University,

Department of Biochemical and Chemical Engineering, Laboratory of Fluid Separations

Emil‐Figge‐Straße 70, D‐44227 Dortmund, Germany, Tel.: +49 231‐755 23 23

andrzej.gorak@tu‐dortmund.de ; www.fvt.bci.tu‐dortmund.de

CO2 capture is an essential step for providing a sustainable and ecological solution to cope with increasing energy supply burning fossil fuels. However, industrial application of current CO2 capture technologies is limited due to the significant energy penalty. In order to reduce this energy penalty two different approaches of process intensification are examined in this study. The first approach aims at the intensification of mass transfer to compensate for low absorption rates of solvents with high capacity that would allow for more energy-efficient CO2 capture. Here the tertiary amine methyldiethanolamine (MDEA) is combined with a highly efficient biocatalyst, the enzyme Carbonic Anhydrase (CA), for which significant enhancement of absorption performance was demonstrated in literature.

In addition to the intensification of the solvent system, the contacting of gas and liquid streams in aband desorption can be improved in intensified contacting devices (ICD). Here especially membrane contactors (MC) and rotating packed beds (RPB) are promising alternatives to classical packed columns. MC provides a well-defined interfacial area that is orders of magnitude higher than for conventional equipment and introduces additional operational flexibility, expressed by the independent flow ratio between liquid and gas phase. In a RPB centrifugal forces are exploited to increase acceleration of the liquid and improve turbulence and mass transfer. The rotational speed of the rotating packing introduces an additional degree of freedom compared to common static equipment. Both ICDs offer a very compact design.

While both, ICD and the improved solvent system with CA, can significantly intensify the CO2 capture process, research on the combination of both is scarce. In order to evaluate the potential benefit of a joint implementation, a first step of imminent importance is to characterize the operating windows of such an intensified process. Based on prior results concerning the energy requirements for solvent regeneration, an aqueous amine solution with 30wt.-% MDEA is investigated in this study without and with dissolved CA. In order to evaluate the potential improvement of a joint application of the ICD and the application of CA absorption experiments in a packed column and in the two ICDs are performed. While all three devices show similar absorption performance without CA added, the RPB offers the advantage to handle exceptionally high gas loads while the MC can be operated over a much wider range of liquid loads. When CA is added to the solvent system the packed column and the RPB show superior performance compared to the MC. While none of the combinations is generally superior, the different means for process intensification extent the operating window and facilitate improved absorption performances.