초록 ▼

Acid gases such as carbon dioxide are removed from air or other gases using a unique carbon-based material. The material is a carbon molecular sieve prepared from oxygen-free precursors carbonized in the absence of oxygen. The pores of the material are then enlarged as by high temperature steaming.

Acid gases such as carbon dioxide are removed from air or other gases using a unique carbon-based material. The material is a carbon molecular sieve prepared from oxygen-free precursors carbonized in the absence of oxygen. The pores of the material are then enlarged as by high temperature steaming. Alcohol amines are then used to impart an amine functionality to the materials. A gas to be treated is contacted with this material at room temperature and atmospheric pressure, with the adsorbed gas being released by heating to a moderate temperature.

대표청구항 ▼

A method of removing an acid gas from a vapor which comprises contacting the vapor and adsorbing at an acid gas adsorption-promoting conditions with an adsorbent which is manufactured by a method which comprises: (a) polymerizing a cross-linking agent and a precursor monomer, with both the cross-lin

A method of removing an acid gas from a vapor which comprises contacting the vapor and adsorbing at an acid gas adsorption-promoting conditions with an adsorbent which is manufactured by a method which comprises: (a) polymerizing a cross-linking agent and a precursor monomer, with both the cross-linking agent and the monomer being essentially free of molecular oxygen, and producing a cross-linked polymer; (b) shaping a quantity of the polymer into an article having a desired configuration; (c) carbonizing the resultant shaped article in a substantially oxygen-free environment and converting polymer into carbon molecular sieves; (d) increasing the pore volume of the carbonized article by contact with steam at 600-1000 degrees C.; and, (e) contacting the carbonized article with a dihydric alcohol amine compound.