By Paul Feron
Absorption-Based Post-Combustion trap of Carbon Dioxide presents a finished and authoritative evaluation of using absorbents for post-combustion seize of carbon dioxide. As fossil fuel-based strength new release applied sciences tend to stay key sooner or later, at the least within the brief- and medium-term, carbon catch and garage can be a severe greenhouse gasoline relief process.
Post-combustion seize includes the removing of carbon dioxide from flue gases after gasoline combustion, which means that carbon dioxide can then be compressed and cooled to shape a correctly portable liquid that may be saved underground.
- Provides researchers in academia and with an authoritative assessment of the amine-based equipment for carbon dioxide catch from flue gases and similar processes
- Editors and participants are renowned specialists within the field
- Presents the 1st e-book in this particular topic
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Extra info for Absorption-Based Post-combustion Capture of Carbon Dioxide
The diffusion coefﬁcient of CO2 in the liquid phase DCO2 ;L is affected by the physical characteristics of the absorbent, in particular its viscosity. This plays a role in both the enhancement factor and kLÃ . 2 Desorption 1. High temperature to ensure lower afﬁnity for CO2 absorption. 2. Chemical equilibria and CO2 solubility shift in favor of CO2 release. The fundamentals of post-combustion capture 31 3. The reverse reactions are fast, and desorption rate is limited only by diffusion. 4. Desorption is endothermic, so heat must be put into the absorbent to maintain its temperature.
However, at practical CO2 loading, amines with greater pKa will have less free amine. 0 (Fig. 13). At a given pKa value, secondary amines give greater kg 0 because their carbamate species are less stable than in primary amines, resulting in greater free amine at the operating conditions of the absorber. The CO2 reaction rate with tertiary amines is much slower. This reversible fast reaction must occur in the boundary layer or bulk solution to provide a route to the equilibrium concentration of bicarbonate.
Other important amine properties include resistance to oxidation, nitrosamine formation, amine aerosol formation, and amine volatility. The chapter concludes with a comprehensive tabulation of liquid absorbent properties and some perspectives on economic optimization. 1 History Acid gas treating Amine scrubbing for CO2 capture from combustion gas is based on the common absorption/stripping process for removing H2S and CO2 from natural gas and other fuel gases. Fig. 1 shows the process patented by Bottoms (1930) to sweeten natural gas.