Abstract
Conventional flue gas cleaning processes are characterized by huge space requirements and related high capital costs. Recent studies on membrane contactors have shown that the contactor volume can be reduced considerably due to the high packing density in this contactor type. This dissertation describes an experimental and theoretical study of the possibilities for replacing conventional scrubbers for flue gas desulfurization by membrane contactors. Three major tasks are critical for development of the membrane based flue gas cleaning process: the membrane, the module design and the process design. A comprehensive study for characterisation of microporous membranes for use in membrane contactors has been carried out in the laboratory. The effect of membrane parameters have been investigated for a wide variety of hydrophobic, microporous membranes in both flat sheet and hollow fibre form. The investigation was performed by SO{sub 2} diffusivity experiments, N{sub 2}- and water permeability experiments, and measurements of NaCl diffusivity through prewetted membranes. Additional information about the pore structures of the flat membranes was obtained from scanning electron microscope photos and measurements of the bubble point pressure. The performance and economics of a membrane contactor flue gas desulfurization process with electrodialytic regeneration of the spent absorbent solution (MCED process)
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Citation Formats
Brummerstedt Iversen, S.
Membrane contactors to replace conventional scrubbers.
Denmark: N. p.,
1994.
Web.
Brummerstedt Iversen, S.
Membrane contactors to replace conventional scrubbers.
Denmark.
Brummerstedt Iversen, S.
1994.
"Membrane contactors to replace conventional scrubbers."
Denmark.
@misc{etde_10110368,
title = {Membrane contactors to replace conventional scrubbers}
author = {Brummerstedt Iversen, S}
abstractNote = {Conventional flue gas cleaning processes are characterized by huge space requirements and related high capital costs. Recent studies on membrane contactors have shown that the contactor volume can be reduced considerably due to the high packing density in this contactor type. This dissertation describes an experimental and theoretical study of the possibilities for replacing conventional scrubbers for flue gas desulfurization by membrane contactors. Three major tasks are critical for development of the membrane based flue gas cleaning process: the membrane, the module design and the process design. A comprehensive study for characterisation of microporous membranes for use in membrane contactors has been carried out in the laboratory. The effect of membrane parameters have been investigated for a wide variety of hydrophobic, microporous membranes in both flat sheet and hollow fibre form. The investigation was performed by SO{sub 2} diffusivity experiments, N{sub 2}- and water permeability experiments, and measurements of NaCl diffusivity through prewetted membranes. Additional information about the pore structures of the flat membranes was obtained from scanning electron microscope photos and measurements of the bubble point pressure. The performance and economics of a membrane contactor flue gas desulfurization process with electrodialytic regeneration of the spent absorbent solution (MCED process) has been evaluated and compared with conventional flue gas desulfurization processes. The basis for the comparison is 96.5% SO{sub 2} removal from a 500 MW power plant burning high sulfur coal. The analysis shows that the MCED process will be highly competitive with the conventional flue gas desulfurization processes. For the best hollow fibre available today, the projected capital costs is about 30% lower than the limestone process with on-site byproduct disposal. (EG)}
place = {Denmark}
year = {1994}
month = {Mar}
}
title = {Membrane contactors to replace conventional scrubbers}
author = {Brummerstedt Iversen, S}
abstractNote = {Conventional flue gas cleaning processes are characterized by huge space requirements and related high capital costs. Recent studies on membrane contactors have shown that the contactor volume can be reduced considerably due to the high packing density in this contactor type. This dissertation describes an experimental and theoretical study of the possibilities for replacing conventional scrubbers for flue gas desulfurization by membrane contactors. Three major tasks are critical for development of the membrane based flue gas cleaning process: the membrane, the module design and the process design. A comprehensive study for characterisation of microporous membranes for use in membrane contactors has been carried out in the laboratory. The effect of membrane parameters have been investigated for a wide variety of hydrophobic, microporous membranes in both flat sheet and hollow fibre form. The investigation was performed by SO{sub 2} diffusivity experiments, N{sub 2}- and water permeability experiments, and measurements of NaCl diffusivity through prewetted membranes. Additional information about the pore structures of the flat membranes was obtained from scanning electron microscope photos and measurements of the bubble point pressure. The performance and economics of a membrane contactor flue gas desulfurization process with electrodialytic regeneration of the spent absorbent solution (MCED process) has been evaluated and compared with conventional flue gas desulfurization processes. The basis for the comparison is 96.5% SO{sub 2} removal from a 500 MW power plant burning high sulfur coal. The analysis shows that the MCED process will be highly competitive with the conventional flue gas desulfurization processes. For the best hollow fibre available today, the projected capital costs is about 30% lower than the limestone process with on-site byproduct disposal. (EG)}
place = {Denmark}
year = {1994}
month = {Mar}
}