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Lim, Hankwon
Sustainable Process Analysis, Design, and Engineering (SPADE)
Research Interests
  • Process analysis, Process design, Techno-economic analysis, Separation process, Reaction engineering, Computational fluid dynamics, Membrane reactor, H2 energy, Water electrolysis, Vanadium redox flow battery, Greenhouse gas reduction

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SNG production with net zero outflow of CO2 in an integrated energy system: An energy and economic aspects

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Title
SNG production with net zero outflow of CO2 in an integrated energy system: An energy and economic aspects
Author
Haider, JunaidLee, BoreumChoe, ChanggwonQyyum, Muhammad AbdulLam, Su ShiungLim, Hankwon
Issue Date
2022-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ENERGY CONVERSION AND MANAGEMENT, v.270, pp.116167
Abstract
Integrated energy systems are getting high attention due to their synergistic effects on both the energy efficiency and process economy. This study demonstrates the similar effect of coupling four processes such as solid oxide electrolyzer cell (SOEC)-based hydrogen production from renewable energy, synthetic natural gas (SNG) pro-duction, steam Rankine cycle (SRC) for energy recovery, and amine-based SNG upgrading. Integration of two SRCs with SNG produces 1.8 MW of power that is assumed to reduce the load on SOEC. In addition, monoethanol amine (MEA)-based chemical absorption provides two benefits comprising SNG upgrading and capture of unreacted CO2. The proposed process integration claims the net zero output of CO2 in purified SNG stream as the captured CO2 is recycled back to the SNG reaction system for process enhancement. Conclusively, proposed integrated process synergistically enhances the SNG production efficiency by up to 86 % while the whole in-tegrated process efficiency is calculated at 77.3 %. Corresponding to process economy, unit production price of SNG is observed to be 0.223 $/kWh, which is comparable to other existing processes. Moreover, methane parity analysis and future predictions are made with expected natural gas price to estimate the possible reliance on SNG in coming decades.
URI
https://scholarworks.unist.ac.kr/handle/201301/60011
DOI
10.1016/j.enconman.2022.116167
ISSN
0196-8904
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