Method for oxygen removal from hydrogen using adsorbent

Patent metadata

Field	Value
Publication number	US-2017174514-A1
Application number	US-201615342775-A
Country	US
Kind code	A1
Filing date	Nov 3, 2016
Priority date	Dec 16, 2015
Publication date	Jun 22, 2017
Grant date	—

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.

First claim

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.

Assignees

• Uop Llc

Inventors

• Caskey Stephen
• Kanazirev Vladislav I
• Traynor Thomas

Classifications

• B01D2257/104

  Oxygen · CPC title

• C01B2203/0465

  Composition of the impurity · CPC title

• B01J20/12

  Naturally occurring clays or bleaching earth · CPC title

• C01G53/04

  Oxides · CPC title

• B01D2256/16

  Hydrogen · CPC title