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Improved Energy Efficiency of Power‐to‐X Processes Using Heat Pumps Towards Mobility Sector Defossilization
Author(s) -
Mantei Franz,
Kraume Matthias,
Salem Ouda
Publication year - 2023
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.202200118
Subject(s) - waste heat , electrolysis , electrification , efficient energy use , process engineering , energy conversion efficiency , process (computing) , waste heat recovery unit , energy carrier , environmental science , waste management , materials science , chemistry , electricity , heat exchanger , mechanical engineering , engineering , computer science , electrical engineering , electrode , optoelectronics , electrolyte , operating system
Combining Power‐to‐X (PtX) processes with high temperature heat pumps (HTHP) can significantly increase their energy efficiency. Evaluating the example of oxymethylene ethers (OME) production from H 2 via H 2 O electrolysis and captured CO 2 from air shows that by upgrading waste heat streams using HTHP, a process overall energy efficiency of higher than 61 % can be achieved compared to 30 % in conventional integrated processes. Thereby, the waste heat stream from H 2 O electrolysis already covers the low temperature heat demand for CO 2 capture via direct air capture, not only for OME but also for various PtX products. Importantly, a significant lever for the energy efficiency enhancement is the consideration of other low temperature heat‐demanding sectors. High overall process energy efficiencies and the electrification of the industry are key aspects towards a sustainable mobility sector.