Nb-doped nickel oxide-zirconia composite catalyst and process for preparing the same

Patent metadata

Field	Value
Publication number	US-11203012-B2
Application number	US-201916545480-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Aug 22, 2018
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

Provided are a Nb-doped nickel oxide-zirconia composite catalyst, and a method for preparing the same. An excellent methane modification reaction is performed by doping a nickel oxide site with niobium, so that alcohol may be prepared at low costs.

First claim

What is claimed is:

1. A Nb-doped nickel oxide-zirconia composite catalyst, wherein the niobium is comprised in an amount of 0.01 to 0.15 mol based on 1 mol of the composite catalyst, and
wherein the composite catalyst consists of the Nb-doped nickel oxide and the zirconia and has a mol ratio of Nb-doped nickel oxide to zirconia of 9.9:0.1 to 8.0:2.0.

2. The composite catalyst of claim 1 , wherein the niobium is niobium dioxide doped on a nickel oxide site.

3. The composite catalyst of claim 2 , wherein the nickel oxide is present in a cubic phase, and the niobium dioxide and the zirconia are present in a tetragonal phase.

4. The composite catalyst of claim 1 , wherein the composite catalyst has an average particle diameter of 1 to 50 μm.

5. A method for preparing the composite catalyst according to claim 1 , the method comprising:
obtaining a precursor mixture solution by dissolving a niobium oxide precursor, a nickel oxide precursor, and a zirconia precursor in an organic solvent;
drying the precursor mixture solution; and
sintering the dried product.

6. The method of claim 5 , wherein the nickel oxide precursor is one or more selected from nickel(II) chloride hydrate, nickel(II) acetate tetrahydrate, and nickel(II) nitrate hexahydrate.

7. The method of claim 5 , wherein the zirconia precursor is zirconium acetate, or zirconium(IV) oxynitrate hydrate.

8. The method of claim 5 , wherein the niobium oxide precursor is ammonium niobate(V) oxalate hydrate or niobium(V) chloride.

9. The method of claim 5 , wherein the organic solvent is one or more selected from methanol, 1-propanol, and 2-propanol.

10. The method of claim 5 , wherein the nickel oxide precursor and the zirconia precursor are mixed at a mol ratio of 10:1 to 8:1.

11. The method of claim 5 , wherein the niobium oxide precursor is used in an amount of 0.7 to 14 parts by weight based on 100 parts by weight of a combined amount of the nickel oxide precursor and the zirconia precursor.

12. The method of claim 5 , wherein the drying of the precursor mixture solution is performed at a temperature of 40 to 100° C. for 1 to 24 hours.

13. The method of claim 5 , wherein the sintering of the dried product is performed at a temperature of 400 to 600° C. for 1 to 4 hours.

Assignees

• Univ Sogang Res & Business Development Found

Inventors

• Moon Jun Hyuk
• Kim Cheol Ho
• Jeong Min Jae

Classifications

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/05

  Nuclear magnetic resonance [NMR] · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title