Method of disposing of carbon dioxide

Abstract

A process and also an arrangement for disposing of one of more carbon dioxide-containing fractions which occur at one or more sites of a fractionation and/or liquefaction process such as, for example, a natural gas liquefaction process. The carbon dioxide-containing fraction(s) is or are subjected to a purification (B) and/or liquefaction (C) and subsequently sequestered (D). Preferably, use is made of at least one substream ( 6 ) of the liquefied carbon dioxide-containing fraction(s) as refrigerant (D) within the fractionation and/or liquefaction process.

1 . A method of disposing of one or more carbon dioxide-containing fractions which occur at one or more sites of a fractionation and/or liquefaction process, such method comprising subjecting the carbon dioxide-containing fraction(s) a purification (B) and/or liquefaction (C) and subsequently sequestering resultant carbon dioxide-containing fraction (D). 
   
   
       2 . A method according to  claim 1 , comprising passing at least one substream ( 6 ) of the liquefied carbon dioxide-containing fraction(s) as refrigerant (D) within the fractionation and/or liquefaction process. 
   
   
       3 . A method according to  claim 1 , wherein the liquefied carbon dioxide-containing fraction(s), before sequestration (D) thereof, is or are pumped ( 9 ) to a pressure of at least 100 bar. 
   
   
       4 . A method according to  claim 1 , wherein, the carbon dioxide-containing fraction(s) has or have a carbon dioxide content of at least 90% by volume. 
   
   
       5 . An arrangement of apparatus for disposing of one or more carbon dioxide-containing fractions which occur at one or more sites of a fractionation and/or liquefaction plants, comprising at least one purification unit (B) and/or at least one liquefaction unit (C) which is or are connected in fluid communication to means for feeding the carbon dioxide-containing fraction(s), and means for feeding resultant purified and/or liquefied carbon dioxide-containing fraction(s) to means for sequestration (D). 
   
   
       6 . An arrangement according to  claim 5 , wherein the means for feeding the purified and/or liquefied carbon dioxide-containing fraction(s) to a sequestration (D) comprises at least one pressure-boosting unit ( 9 ). 
   
   
       7 . An arrangement according to  claim 6 , wherein the pressure-boosting unit ( 9 ) has means to increase the pressure of the carbon dioxide-containing fraction(s) fed to the means for sequestration (D) to at least 100 bar. 
   
   
       8 . A method according to  claim 1 , wherein said sites include a natural gas liquefaction process.