Unveiling the critical role of biogas compositions on carbon dioxide separation in biogas upgrading using pressure swing adsorption

Carbon dioxide (CO2) removal from natural gas attracts more attention than other impurities due to its corrosiveness property and it also possess no heating value in the sales natural gas. Amine based chemical absorption has been used commercially for CO2 separation in gas processing plant. However, the liquid amine based processes pose operating difficulties due to high regeneration energy, large equipments size and solvent leakage. This research studies modification of porous materials, zeolite NaY by grafting amine functional group using monoethanolamine directly to the surface of the solid sorbents. The structures and physical properties of amine modified adsorbent were characterized using powder X-Ray Diffraction (XRD), nitrogen adsorption at 77K and thermogravimetric analysis. Since application of Pressure Swing Adsorption (PSA) has been widely used in various plants in the world, this research was extended to study carbon dioxide separation using amine modified adsorbents in PSA experimental system. Effects of adsorption and regeneration behaviour on CO2 separation were investigated. Amine modified NaY showed better result compared to unmodified NaY in term of improvement in physical and chemical properties, high CO2 adsorption capacity and modified adsorbents were ease of regeneration.

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Adsorption of Carbon Dioxide on Monoethanolamine (MEA)–Impregnated Kenaf Core Fiber by Pressure Swing Adsorption System (PSA)

Jurnal Teknologi ◽

10.11113/jt.v68.3023 ◽

2014 ◽

Vol 68 (5) ◽

Cited By ~ 1

Author(s):

Nabilah Zaini ◽

Khairul Sozana Nor Kamarudin

Keyword(s):

Carbon Dioxide ◽

Carbon Capture ◽

Pressure Swing Adsorption ◽

Co2 Adsorption ◽

Carbon Capture And Storage ◽

Freundlich Isotherm ◽

Industrial Applications ◽

Sem Analysis ◽

Impregnation Method ◽

Pressure Swing

Emission of carbon dioxide (CO2) becomes a major concern in combating issues of global warming. The strategy to reduce the concentration of CO2 could be achieved by executing carbon capture and storage (CCS) technology such as adsorption. This study presents the used of kenaf as a green source for CO2 adsorption material. The modification of MEA on kenaf is a novelty work to enhance the capacity of adsorbent since MEA has been proved to have potential in separating CO2 in industrial applications. In this work, 10 wt % of MEA has been impregnated on kenaf via wet impregnation method. The adsorption of CO2 study was conducted by passing CO2/N2 mixture in a ratio of 30:70 in a Pressure Swing Adsorption (PSA) system with a pressure up to 1.5 bar at ambient temperature. Result obtained via SEM analysis shows that the morphology of kenaf was affected after modification with MEA. However, the presence of MEA on kenaf has improved the CO2 adsorption capacity by 16 %. In addition, the adsorption equilibrium data for kenaf and MEA modified kenaf are well fitted in Freundlich isotherm model at low pressure and well fitted in Langmuir model at higher pressure. This study indicates that the introduction of MEA on kenaf could enhance the CO2 adsorption process.

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