“…If the membrane surface is modified, the hydrophobic will be improved. A study by Koonaphapdeelert et al (2009) suggested that ceramic hollow fiber membrane contactors were immune from hydrodynamic problems.…”
With the aggravation of the unprecedented greenhouse effect, the reduction of greenhouse gases which mainly consist of CO 2 has caught high attention by global scholars. The membrane absorption of CO 2 from the flue gas seems a promising alternative to conventional absorption methods like chemical absorption. In this article, the principles of the membrane absorption process were discussed. The research development and current status of CO 2 capture in flue gas using a hollow fiber membrane contactor were reviewed. The affecting factors included the membrane structure and material, module connection form, gas and liquid flow pattern and absorbent. Also, these factors that affected the separation performance of mass transfer processes, as well as the mass transfer coefficients and models for CO 2 absorption were critically discussed in the tube side, shell side and membrane. Also, an experiment system for CO 2 absorption in a membrane contactor was dipicted. The modeling works were validated with experimental results. Additionally, the deficiencies of present development in membrane gas absorption of acid gases and recommendations for future pilot-scale applications were proposed.
“…If the membrane surface is modified, the hydrophobic will be improved. A study by Koonaphapdeelert et al (2009) suggested that ceramic hollow fiber membrane contactors were immune from hydrodynamic problems.…”
With the aggravation of the unprecedented greenhouse effect, the reduction of greenhouse gases which mainly consist of CO 2 has caught high attention by global scholars. The membrane absorption of CO 2 from the flue gas seems a promising alternative to conventional absorption methods like chemical absorption. In this article, the principles of the membrane absorption process were discussed. The research development and current status of CO 2 capture in flue gas using a hollow fiber membrane contactor were reviewed. The affecting factors included the membrane structure and material, module connection form, gas and liquid flow pattern and absorbent. Also, these factors that affected the separation performance of mass transfer processes, as well as the mass transfer coefficients and models for CO 2 absorption were critically discussed in the tube side, shell side and membrane. Also, an experiment system for CO 2 absorption in a membrane contactor was dipicted. The modeling works were validated with experimental results. Additionally, the deficiencies of present development in membrane gas absorption of acid gases and recommendations for future pilot-scale applications were proposed.
“…That allows to conclude that in a case of use of microporous membranes microbubbling device may have advantages in terms of efficiency of mass transfer as compared to devices with hollow fiber membranes. In addition, the majority of polymer hollow fiber membranes lose their performance characteristics at elevated temperatures, in contrast to ceramic membranes (Koonaphapdeelert, & Zhentao, 2009), which indicates another important advantage of microbubbling device.…”
Section: Analysis Of Adequacy Of the Obtained Datamentioning
The presented paper describes energy saving technology of biogas purification by microbubling method Description of a new design of microbubling equipment for gas-liquid solution and mathematical simulation of a process during chemisorption of carbon dioxide are presented. Experimental studies of mass transfer characteristics of microbubling equipment, based on model systems, were conducted with an aim to define a possibility of application of microbubling process for removal of carbon dioxide from biogas in order to obtain highly concetrated metane. As a result of the study optimal process parameters are defined, key factors affecting mass transfer characteristics of membrane microbubling method are also established. Efficiency of membrane microbubling equipment from the point of view of interphase mass transfer is assessed.
The process of carbon dioxide removal from monoethanolamine (MEA) -water solution was investigated on Poly Di Methyl Siloxane (PDMS) hydrophobic tubular membrane with a ceramic support. The effects of feed temperature, liquid flow rate and MEA concentration on CO 2 mass transfer and selectivity were examined and found to be with a reasonable deviation (±25%) with predictions based on the multilayer film model. The membrane resistance was evaluated in separate experiments. The measured CO 2 mass fluxes (0.17-0.45 kg/(m 2 h)) were found to be independent of the MEA concentration in the feed.
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