Browsing NTNU Open by Author "Hamedi, Homa"
Now showing items 1-4 of 4
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A novel cost-effective silica membrane-based process for helium extraction from natural gas
Hamedi, Homa; Karimi, Iftekhar A; Gundersen, Truls (Peer reviewed; Journal article, 2019)Natural gas reserves with 0.3–2 mol% helium are considered as the only viable source for this noble gas. Currently, cryogenic separation is used to extract helium, but it is energy-intensive. While membrane-based separation ... -
Optimal cryogenic processes for nitrogen rejection from natural gas
Hamedi, Homa; Karimi, Iftekhar A; Gundersen, Truls (Journal article; Peer reviewed, 2018)Nitrogen rejection processes are usually needed for two natural gas sources: sub-quality natural gas reserves and produced gas from enhanced oil/gas recovery technologies. The nitrogen content of natural gas in the former ... -
Optimization of helium extraction processes integrated with nitrogen removal units: A comparative study
Hamedi, Homa; Karimi, Iftekhar A; Gundersen, Truls (Journal article; Peer reviewed, 2019)Helium is regarded as a vital gas to various industries such as medicine, aircraft manufacturing, electronics and fiber optics fabrication. Currently, natural gas reserves are considered the only viable resource for this ... -
Simulation-based approach for integrating work within heat exchange networks for sub-ambient processes
Hamedi, Homa; Karimi, Iftekhar; Gundersen, Truls (Peer reviewed; Journal article, 2020)Integrating work synergistically within heat exchange networks can offer considerable energy savings. Several publications have attempted to optimize this integration using a mathematical programming approach. However, the ...