US 8,146,661 B2 · Cryogenic treatment of gas

Abstract

Systems and methods of treating a gas stream are described. A method of treating a gas stream includes cryogenically separating a first gas stream to form a second gas stream and a third stream. The third stream is cryogenically contacted with a carbon dioxide stream to form a fourth and fifth stream. A majority of the second gas stream includes methane and/or molecular hydrogen. A majority of the third stream includes one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof. A majority of the fourth stream includes one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2. A majority of the fifth stream includes hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.

Claims20

Dependent claims

A method of treating a gas stream, comprising:

in a first cryogenic zone, cryogenically separating a first gas stream to form a second gas stream and a third stream, wherein a majority of the second gas stream comprises methane and/or molecular hydrogen and a majority of the third stream comprises one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof;
and
in a second cryogenic zone, cryogenically contacting the third stream with a carbon dioxide stream to form a fourth stream and a fifth stream, wherein a majority of the fourth stream comprises one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2, and a majority of the fifth stream comprises hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.

Dependencies are inferred from the claim text.

Cryogenic treatment of gas

Life of this patent

Cryogenic treatment of gas

Life of this patent

Abstract

Claims20