Economic analysis of CO2 separation from coal-fired flue gas by chemical absorption and membrane absorption technologies in China

CO2 Capture from Flue Gas by Phase Transitional Absorption

Correlating Physicochemical Properties of Commercial Membranes with CO2 Absorption Performance in Gas-Liquid Membrane Contactor

The gas-liquid membrane contactor (GLMC) is a promising alternative gas absorption/desorption configuration for effective carbon dioxide (CO2 ) capture. The physicochemical properties of membranes may synergistically affect GLMC performances, especially during the long-term operations. In this work, commercial polypropylene (PP) and polyvinylidene fluoride (PVDF) hollow fiber (HF) membranes wer...

Using bromine gas to enhance mercury removal from flue gas of coal-fired power plants.

Bromine gas was evaluated for converting elemental mercury (Hg0) to oxidized mercury, a form that can readily be captured by the existing air pollution control device. The gas-phase oxidation rates of Hg0 by Br2 decreased with increasing temperatures. SO2, CO, HCl, and H2O had insignificant effect, while NO exhibited a reverse course of effect on the Hg0 oxidation: promotion at low NO concentra...

Enhanced elemental mercury removal from coal-fired flue gas by sulfur-chlorine compounds.

Oxidation of Hg(0) with any oxidant or converting itto a particle-bound form can facilitate its removal. Two sulfur-chlorine compounds, sulfur dichloride (SCl2) and sulfur monochloride (S2Cl2), were investigated as oxidants for Hg(0) by gas-phase reaction and by surface-involved reactions in the presence of flyash or activated carbon. The gas-phase reaction between Hg(0) and SCl2 is shown to be...

Solvent Formulation for CO2 Separation from Flue Gas Streams

CO2 separation using reactive solvents is considered to be a technically viable option for capturing of CO2 from flue gas streams. However, the cost of CO2 capture using conventional solvents such as aqueous solutions of monoethanolamine (MEA) is prohibitively high. Nearly half of the total cost is due to operational costs, of which about 70 to 80% can be contributed to the cost of regeneration...