METHOD FOR OXYGEN REMOVAL FROM HYDROGEN USING ADSORBENT

• US 20170174514A1
• Filed: 11/03/2016
• Published: 06/22/2017
• Est. Priority Date: 12/16/2015
• Status: Active Grant

• Current Assignee: UOP Llc (Honeywell International Inc.)
• Original Assignee: UOP Llc (Honeywell International Inc.)
• Inventors: Caskey, Stephen, Kanazirev, Vladislav I., Traynor, Thomas
• Granted Patent: US 10,450,244 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2253/112 Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
• CPC Class Codes: B01D 2256/16 Hydrogen
• CPC Class Codes: B01D 2256/20 Carbon monoxide
• CPC Class Codes: B01D 2256/245 Methane
• CPC Class Codes: B01D 2257/104 Oxygen
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/04 with stationary adsorbents B01D53/025 takes precedence
• CPC Class Codes: B01D 53/46 Removing components of defined structure
• CPC Class Codes: B01J 20/06 comprising oxides or hydroxides of metals not provided for in group B01J20/04
• CPC Class Codes: B01J 20/12 Naturally occurring clays or bleaching earth
• CPC Class Codes: B01J 20/3042 Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
• CPC Class Codes: B01J 20/3085 Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
• CPC Class Codes: C01B 13/0281 in getters
• CPC Class Codes: C01B 2203/042 Purification by adsorption on solids
• CPC Class Codes: C01B 2203/0465 Composition of the impurity
• CPC Class Codes: C01B 3/50 Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification C01B3/14 takes precedence
• CPC Class Codes: C01G 45/02 Oxides; Hydroxides
• CPC Class Codes: C01G 49/02 Oxides; Hydroxides C01G49/0018 takes precedence
• CPC Class Codes: C01G 51/04 Oxides; Hydroxides
• CPC Class Codes: C01G 53/04 Oxides; Hydroxides
• CPC Class Codes: C07C 7/12 : by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers

Abstract

The present subject matter relates generally to a method for the removal of oxygen from hydrogen using a manganese, iron, nickel or cobalt based adsorbent. More specifically, the present subject matter relates to the methods for the removal of oxygen from hydrogen using a manganese based adsorbent without the generation of water or other oxides.

Claims

1. A process for removing oxygen from an oxygen containing gas mixture comprising the steps of:

providing a partially oxidized form of a metal carbonate selected from the group consisting of manganese carbonate, iron carbonate, nickel carbonate and cobalt carbonate;

contacting said partially oxidized form of metal carbonate with said gas mixture; and

adsorbing said oxygen from the gas mixture without generating water to produce a purified gas.

2. The process of claim 1 wherein said adsorption is carried out at a temperature from about 20°

C. to about 200°

C.

3. The process of claim 1 wherein said partially oxidized form of metal carbonate has a crystallite particle size of less than about 0.08 microns.

4. The process of claim 1 wherein said gas mixture comprises from about 1 to about 100 ppm oxygen.

5. The process of claim 1 wherein said gas mixture further comprises hydrocarbons.

6. The process of claim 5 wherein said hydrocarbons comprise methane.

7. The process of claim 1 wherein said gas mixture further comprises hydrogen and carbon monoxide.

8. The process of claim 1 wherein said purified gas contains no more than about 0.1 ppm oxygen.

9. A method for preparing an improved adsorbent for removing oxygen comprising:

providing a precursor selected from the group consisting of manganese carbonate, iron carbonate, nickel carbonate and cobalt carbonate;

adding and mixing about 15-20% water to the precursor to generate a mull LOI of 45-55% to prepare a mixture;

mixing and forming;

drying the mixture to about 0.5-3% water; and

partially decomposing to suboxide the said precursor.

10. An adsorbent prepared by the method of claim 9.

11. The adsorbent of claim 10 wherein said precursor is manganese carbonate.

12. The adsorbent of claim 10 wherein said precursor is iron carbonate.

13. The adsorbent of claim 10 wherein said precursor is nickel carbonate.

14. The adsorbent of claim 10 wherein said precursor is cobalt carbonate.