(571g) Process Design and Integration of Membrane-Cryogenic Distillation Based Hybrid Capture Systems for Hydrogen Production Process

Membrane-based capture processes offer various advantages including modularity configuration, compact size, less noxious emissions, and small carbon footprint, compared to other capture technologies, such as solvent or sorbent processes. Stand-alone membrane-based capture is inherently limited to achieve a very high purity product because of its separation mechanism. However, the shortcoming of non-sharp separation from the membrane can be supplemented with the hybridization of membrane-based capture with other separation technologies, for example, cryogenic distillation. To fully materialize the synergetic benefit of membrane-cryogenic distillation hybrid process, design interactions between two separation mechanisms should be systematically understood. Hence, in this study, process modelling and simulation of membrane-cryogenic distillation hybrid capture systems is carried out when the capture is applied to the post-combustion flue gas stream generated from a SMR(Steam Methane Reforming)-based hydrogen plant. Process modelling and simulation was conducted in a MATLAB® environment which is linked with UniSim® simulator. Genetic Algorithm was applied to determine optimal process configuration and its operating conditions in a holistic manner. Economic trade-off between capital cost and operating expenditure is investigated to understand techno-economic benefits gained from the hybridization concept.

Acknowledgement: This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Environmental Technology Development Program, funded by Korea Ministry of Environment (MOE) (No. 202200000000760)

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A2C2002263)