Abstract: A carbon dioxide separator includes an absorption tower for producing a carbon dioxide-rich absorbent and a carbon dioxide-depleted flue gas by reaction of a carbon dioxide-containing flue gas and an absorbent contained therein; a regeneration tower for removing the carbon dioxide-rich absorbent transferred from the absorption tower in the presence of the flowing gas to separate the same into a carbon dioxide-rich treatment gas and a carbon dioxide-lean absorbent; and a separation membrane module for selectively membrane-separating and concentrating the carbon dioxide, wherein the carbon dioxide-containing flue gas is transferred to the absorption tower as a carbon dioxide-lean flue gas obtained via the separation membrane module, and the flowing gas is transferred to the regeneration tower as the carbon dioxide-rich flue gas obtained via the separation membrane module from the carbon dioxide-containing flue gas.

Abstract: A bent rotor straightening method using low-frequency induction heating and a bent rotor straightening apparatus using the method are proposed. The bent rotor straightening method using low-frequency induction heating according to an embodiment of the present invention includes: calculating a heating speed when a first target temperature for correcting bending of a rotor using low-frequency induction heating is set; maintaining the first target temperature for a heating time determined on the basis of a diameter of the rotor when the first target temperature is reached, when performing primary thermal correction at the heating speed; checking whether a bending amount of the rotor reaches a predetermined critical value in accordance the result of performing the primary thermal correction; and finishing correction of bending of the rotor in accordance with the result of checking the bending amount of the rotor.

Abstract: The present invention relates to a carbon dioxide absorbent used for absorbing carbon dioxide, a carbon dioxide absorbent composition used for producing the carbon dioxide absorbent, and a solid raw material for a carbon dioxide absorbent included in the carbon dioxide absorbent.

Abstract: Disclosed herein is a method for preparing a dry regenerable sorbent which comprises the steps of obtaining a slurry through formulation, mixing, comminuting and dispersion of the sorbent raw materials, forming the slurry by spray drying to produce sorbent particles, and calcining the sorbent particles. In the step of obtaining a slurry, there is used organic additives (dispersant, a flow control agent, and an organic binder) necessary to obtain a well-dispersed, stable and free-flowing slurry in which the raw materials are present below a sub-micron level (nanosize). The organic additives are removed and decomposed through the calcining. The use of the hydrophilic and high specific surface area support allows the dry regenerable sorbent to have a high reactivity. The solid active component is used instead of a liquid amine used in a conventional wet carbon dioxide capture technology. In addition, the sorbent can be re-used through continuous sorption and regeneration processes.

Abstract: Disclosed herein is a dry regenerable sorbent for carbon dioxide capture from flue gas produced by fossil fuel-fired power plants including industrial boilers before being released to atmosphere or from fuel gas stream such as syngas produced by conversion of fossil fuel (e.g. gasification), by dry regenerable sorbent technology. The dry regenerable sorbent comprises: 70 wt % or less of an active component selected from solid compounds capable of being converted to metal carbonates; 70 wt % or less of a support selected from solid porous non-metallic materials capable of imparting a required specific surface area to the sorbent; and 70 wt % or less of an inorganic binder selected from cement-like, clay-like, and ceramic-like binders capable of imparting mechanical strength to the sorbent, the total weight of the solid raw materials being 100 wt %.