Functionalized Adsorbent for Removal of Acid Gases and Use Thereof

2:

• The mesoporous support material of claim 1, which is functionalized by addition of acid-gas reactive functional groups within the pores of said support material.

3:

• A regenerable acid-gas adsorbent comprising the mesoporous support material of claim 1, which support is functionalized by addition of acid-gas reactive functional groups within the pores of said support material.

4:

• The acid-gas adsorbent of claim 3, wherein said acid-gas reactive functional groups are amino groups.

5:

• The acid-gas adsorbent of claim 4, wherein said functional groups are added by direct loading of compounds containing said functional groups to said mesoporous support material.

6:

• The acid-gas adsorbent of claim 4, wherein said functional groups are added by grafting of silane compounds containing said functional groups to said mesoporous support material.

7:

• The acid-gas adsorbent of claim 6, wherein said silane compounds are alkoxy-silane compounds, chloro-silane compounds, silanol compounds, or any combination thereof.

8:

• The acid-gas adsorbent of claim 7, wherein said alkoxy-silane compounds are selected from the group consisting of aminopropyl-methyl-dimethoxysilane, amino-propyl-trimethoxysilane, aminoethylaminopropyl-methyl-dimethoxysilane, aminoethylaminopropyl-trimethoxysilane, aminoethylaminoethylaminopropyl-methyl-dimethoxysilane, aminoethylaminoethylaminopropyl-trimethoxysilane and combinations thereof.

9:

• A method for removing or recovering acid gas from an gaseous stream or atmosphere containing said acid gas, comprising the step of contacting the gaseous stream or atmosphere with an adsorbent according to claim 3.

10:

• The method according to claim 9, for use in a confined space closed loop system, a fossil fuel combustion process, a biogas combustion process, a biogas derived process, a natural gas treatment process, an industrial process or a chemical production process.

13:

• The process according to claim 12, wherein said functionalization compound is an alkoxy-silane compound, a chloro-silane compound, a silanol compound, or any combination thereof.

14:

• The process according to claim 13, wherein said alkoxy-silane compound is selected from the group consisting of aminopropyl-methyl-dimethoxysilane, amino-propyl-trimethoxysilane, aminoethylaminopropyl-methyl-dimethoxysilane, aminoethylaminopropyl-trimethoxysilane, aminoethylaminoethylaminopropyl-methyl-dimethoxysilane, aminoethylaminoethylaminopropyl-trimethoxysilane and combinations thereof.

15:

• The process according to claim 12, wherein a temperature ratio is in the range of 0.1 to 1.0, said temperature ratio being the ratio of the functionalization temperature to the boiling point of said solvent.

16:

• The process according to claim 15, wherein said solvent is toluene and said temperature ratio is in the range of 0.68 to 0.82.

17:

• The process according to claim 13, wherein the ratio of silane compound to said support material is in the range of 0.0001 to 10 (volume/weight).

18:

• The process according to claim 12, wherein water is added to the suspension formed in step (i) prior to the addition of said functionalization compound in step (ii).

19:

• The process according to claim 18, wherein said functionalization compound is an alkoxy-silane compound, said solvent is toluene and the ratio of the molar amount of water added to the molar amount of alkoxy groups present in said alkoxy-silane compound is in the range of 0.0 to 1.0.