Method for regenerating a used sorbent having a gas adsorbate adsorbed thereto

Patent metadata

Field	Value
Publication number	US-2017036192-A1
Application number	US-201515305336-A
Country	US
Kind code	A1
Filing date	Apr 16, 2015
Priority date	Apr 22, 2014
Publication date	Feb 9, 2017
Grant date	—

Abstract

The invention relates to methods for regenerating a used sorbent having a gas adsorbate adsorbed thereto. In particular, the used sorbent comprises liquid marbles. The liquid in the liquid marbles is comprised of a material or mixture of materials that selectively removes unwanted gaseous component in the gas to be purified.

First claim

1 . A method for regenerating a used sorbent having a gas adsorbate adsorbed thereto, comprising exposing the used sorbent to dielectric heating wherein the used particles and/or a mixture of a plurality of particles encapsulating at least one type of liquid therein

2 . The method according to claim 1 , wherein exposing the used sorbent to dielectric heating comprises exposing the used sorbent to microwave radiation,

3 . The method according to claim 2 , when the used sorbent is exposed to microwave radiation in microwave synthesizer.

4 . The method according to claim 3 , wherein the microwave synthesizer is configured to operate at 100 to 1,200 Watts.

5 . The method according to claim 4 , wherein the microwave synthesizer is configured to operate at 500 to 1,200 Watts.

6 . (canceled)

7 . The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation for 3 hours or less.

8 . The method according to claim 7 , wherein the used sorbent is exposed to microwave radiation for 1 hour or less.

9 . The method according to claim 2 wherein the used sorbent is exposed to microwave radiation for an interval of 10-30 seconds.

10 . The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation at 90-150° C.

11 . The method according to claim 10 , wherein the used sorbent is exposed to microwave radiation at 90-120° C.

12 . The method according to claim 2 , wherein the used sorbent is exposed to microwave radiation in the absence of an inert purge gas.

13 . (canceled)

14 . The method according to claim 1 , wherein the gas adsordate comprises natural gas, flue gas, carbon monoxide, carbon dioxide, hydrogen sulfide, water vapour, a sulfur-containing gas, a malodorous gas, a toxic gas, or a mixture thereof.

15 . The method according to claim 1 , wherein the at least one type of liquid is selected from the group consisting of ionic liquid, alkanoamine molecule containing amine functionality, desiccant, glycol, a solution thereof, amine-containing oligomers or polymers and a mixture thereof.

16 . The method according to claim 15 , wherein the alkanolamine comprises ethanolamine, preferably monoethanolamine (MEA), diethanolamine (DEA) triethanolamine (TEA), methyldiethanoamine (MDEA), or 2-amino-2-methyl-1-propanol (AMP).

17 . The method according to claim 16 , wherein the alkanolamine comprises neat MEA or an aqueous solution of MEA.

18 . The method according to claim 15 , wherein the at least one type of liquid comprises a mixture of at least one alkanolamine and at least one further amine.

19 . The method according to claim 18 , wherein the at least one alkanolamine comprises MEA, DEA, or AMP and the at least one further amine comprises piperazine.

20 . The method according to claim 16 , wherein the alkanolamine comprises neat DEA or an aqueous solution of DEA.

21 . The method according to claim 1 , wherein the plurality of particles comprises or consists of a material selected from the group consisting of a metal, a metal oxide, an organic compound, a polymer, a composite, and a mixture thereof.

22 . The method according to claim 21 , wherein the plurality of particles is comprised of titanium dioxide (TiO 2 ), zinc oxide (ZnO), aluminium oxide (Al 2 O 3 ), or cerium oxide (CeO 2 ).

23 . (canceled)

Assignees

• Agency Science Tech & Res

Inventors

• Chin Jia Min
• Yang Jin
• Tan Han Yang
• Sum Yin Ngai
• Tay Siok Wei

Classifications

• B01J20/08

  comprising aluminium oxide or hydroxide; comprising bauxite · CPC title

• B01J20/06

  comprising oxides or hydroxides of metals not provided for in group B01J20/04 · CPC title

• B01J20/3441

  Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves · CPC title

• B01D2252/504

  Mixtures of two or more absorbents · CPC title

• B01D2252/2023

  Glycols, diols or their derivatives · CPC title