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Effect of Operating Conditions on Cryogenic Carbon Dioxide Removal
Author(s) -
Fazlollahi Farhad,
Saeidi Samrand,
Safdari MohammadSaeed,
Sarkari Majid,
Klemeš Jiří J.,
Baxter Larry L.
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600802
Subject(s) - heat exchanger , liquefied natural gas , process engineering , methane , natural gas , carbon dioxide , exergy , co2 removal , test bench , cryogenics , extraction (chemistry) , process (computing) , waste management , environmental science , chemistry , materials science , nuclear engineering , mechanical engineering , chromatography , thermodynamics , engineering , computer science , organic chemistry , physics , operating system
In this investigation, a natural‐gas (NG) treatment system for NG sources with high CO 2 content is simulated experimentally and theoretically using Aspen Plus. The concept uses patented heat exchangers and a process design developed as part of the cryogenic carbon capture(CCC) process to remove enough CO 2 to enable the treated gas to be handled without the modification of traditional NG equipment. Simultaneously, the process removes liquefied natural gas (LNG) very efficiently. This process provides a simpler alternative to the solvent‐based CO 2 removal, absorbent drying, and cryogenic NG liquid extraction systems found in traditional NG processing. The data from an experimental bench‐scale apparatus verify the results of the simulations as a function of NG composition and pressure. Costing parameters, exergy loss, and heat‐exchanger efficiency are also discussed. The results confirm low exergy losses for bench‐scale apparatus. The system uses heat exchangers with efficiencies of more than 90 %. High pressure and low methane content in the NG result in high CO 2 capture.