Removal of Amines from Wastewater Using Membrane Separation Processes

Abstract:

Natural gas is one of the energy sources in the world. It consists of predominantly methane (CH₄), ethane (C₂H₆), ethylene (C₂H₄), propane (C₃H₈) butane (C₄H₁₀), pentane (C₅H₁₂) and some impurities particularly hydrogen sulfide (H₂S) and carbon dioxide (CO₂) that need to be treated prior utilized. Amine solution such as diisopropanolamine (DIPA) is used to remove the CO₂ and H₂S in natural gas processing. However a small amount of amines losses in some unit operations causing amines discharged into the effluent wastewater. The objective of this study are to investigate the flux of water and permeate, and rejection of DIPA solution across reverse osmosis, nanofiltration and ultrafiltration membrane which known as AFC99, AFC40 and CA202 respectively. This paper studies the effect of cross-flow velocity on permeate flux and the effect of feed concentration on observed rejection of DIPA solution across AFC99, AFC40 and CA202 over the operating pressure. The results showed a significant role of cross-flow velocity on membrane performance from aspect flux obtained and phenomenon of concentration polarization that would increase the transport resistance of permeate flow. The highest flux can be achieved by high cross-flow velocity. While for rejection study, rejection of all membranes increase with increase of pressure yet decrease with concentration.

• Periodical: Applied Mechanics and Materials (Volume 625)
• Pages: 639-643
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.625.639
• Online since: September 2014
• Authors: Ma Umaira Suhaddha Zainal Abidin*, Hilmi Mukhtar, Maizatul Shima Shaharun
• Keywords: Cross-Flow Velocity, Membrane, Permeate Flux, Rejection

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