Removal Efficiency of Saltsfor Desalination Process Using Gas Hydrate Formation  

Oleh:

Park, Kyeong Nam ; Kang, Kyung Chan ; Hong, Sang Yeon ; Lee, Jinwoo ; Lee, Ju Dong

Jenis: Article from Proceeding
Dalam koleksi: The 14th Asia Pacific Industrial Engineering and Management Systems Conference (APIEMS), 3-6 December 2013 Cebu, Philippines, page 1-6.
Topik: gas hydrate; desalination; desalination process; CO2 hydrate
Fulltext: 1274.pdf (327.94KB)

Isi artikel

A novel desalination process was suggested using gas hydrate formation. The gas hydrates are non-stoichiometric crystalline inclusion compounds formed by water and a number of small molecules at suitable temperature and pressure conditions. The desalination process by gas hydrate is based on a liquid to solid phase change coupled with a physical process to separate the solids from the remaining liquid phase. The experimental pressure and temperature conditions were 2.9 MPa and 278 K. The reactor was filled with gas hydrate slurries formed by mixing sea water and CO2. The process is able to extract hydrate pellets from the reactor containing hydrate slurries. The desalination process continuously produces and pelletizes CO2 hydrates. The salt concentrations of dissolved CO2 hydrates were investigated using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) analysis for calculating removal efficiencies. 72-80% of each dissolved mineral was removed by the desalination process using gas hydrate formation. This study illustrates that the suggested method and apparatus may solve the separation difficulty between hydrate crystals and concentrated brine solutions, thus it can be applied for more effective desalination processes.

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