Hydrogen Sulfide Capture Using Amine Modified Mesoporous Oxides
Okonkwo, Claudia N.
MetadataShow full item record
Hydrogen Sulfide (H2S) is a pollutant that is odorous, poisonous and corrosive. It is a common contaminant in effluents associated with many industrial processes, including natural gas and biogas upgrading. Liquid phase chemical scrubbing with liquid amines and polymer membrane technology are the two current major acid gas removal techniques, with limitations arising in their high regeneration cost, excessive corrosion, or low selectivity, which lead to the loss of methane. Adsorption is an energy-efficient technology for both carbon dioxide (CO2) and H2S capture and requires materials with high and stable adsorption capacity and selectivity that operate under mild conditions. Solid amine adsorbents have been proposed for capture of such acid gases, owing to their basic character, imparted by the amines. This work investigates the effects of amine type (primary, secondary and tertiary amines), amine structure (hindered and unhindered amines) and humidity on the adsorption of H2S. By developing amine- H2S -silica structure-property relationships for these materials, the requisite fundamental understanding of the adsorption process will be obtained such that the rational design of improved adsorption materials, tailored for H2S interactions, will be possible.