Abstract The flexible operation of energy‐intensive processes, such as cryogenic air separation, has economic potential due to increasing fluctuations of the electricity markets. Multiproduct air separation processes with high ratios of liquid product are very promising for flexible operation due to storable products. We present a process design with an integrated liquefication cycle and liquid assist operation, that facilitates a high liquid product ratio and a flexible process operation. We use a mechanistic dynamic process model in steady‐state process optimizations covering the wide operational range of the proposed process. The optimization results show that the power demand can be varied in a range from 3.5 to 28 MW without violating operational constraints by changing the nitrogen and oxygen production rates. Thus, the proposed process is a promising air separation candidate for flexible operation with respect to fluctuating electricity markets.
Abstract The common understanding of Power‐to‐X is exclusively the use of renewable electricity to manufacture products currently based on fossil sources. In this paper, it is argued that beyond such e‐Production many of these technologies also include aspects related to demand side management and temporal storage of electricity. Therefore, a definition of Power‐to‐X is suggested that encompasses all three aspects. It is discussed, which of these are relevant under which conditions and illustrative examples are highlighted, which show how process systems engineering can help address common challenges for Power‐to‐X technologies.
vergleichsweise aufwa ¨ndig und beno ¨tigt informative Experimente.Um Korrelationen der Analyten zu durchbrechen und zuverla ¨ssige PLS-Modelle zu erhalten, werden die verschiedenen Zusta ¨nde