Ni—MgO—ZnO solid catalysts for syngas preparation and process for the preparation thereof

Patent metadata

Field	Value
Publication number	US-9950315-B2
Application number	US-201514842301-A
Country	US
Kind code	B2
Filing date	Sep 1, 2015
Priority date	Sep 2, 2014
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present invention provides a process and catalyst for the production of synthesis gas (a mixture of CO and H 2 ) by reforming of methane with carbon dioxide. The process provides a direct single step selective vapor phase dry reforming of methane with carbon dioxide to produce synthesis gas over Ni—MgO—ZnO catalyst between temperature range of 600° C. to 800° C. at 1 atmospheric pressure. The process provides a methane conversion of 5-95% with H 2 to CO mole ratio of 0.83-1.2.

First claim

We claim:

1. A process for the preparation of a Ni—MgO—ZnO solid catalyst, the catalyst comprising:
a) Ni in the range of 2-10%,
b) MgO in the range of 2-10% and
c) ZnO in the range of 90-95%,

wherein the said process comprises the steps of:
i. dissolving Zinc nitrate hexahydrate and Magnesium nitrate hexahydrate in water,
ii. adding Nickel nitrate hexahydrate in water to the mixture as obtained in step (i) followed by stirring to obtain a homogenous mixture;
iii. adding a solution of CTAB (cetyltrimethylammonium bromide) in ethanol to the mixture as obtained in step (ii) with stirring for period in the range of 1 to 2 hours followed by adding hydrazine hydrate with adjusting the pH of the solution in the range of 8-12 to obtain a solution,
iv. stirring the solution as obtained in step (iii) for a period in the range of 1-3 hours followed by autoclaving for period in the range of 12 to 48 hours at a temperature in the range of 160 to 180° C. to obtain a precipitate;
v. filtering the precipitate as obtained in step (iv) with water and drying at a temperature ranging between 60 to 110° C. for a time period ranging between 12-20 hours followed by calcining at a temperature in the range of 400-750° C. for a time period of 4-8 hours to obtain the Ni—MgO—ZnO catalyst.

2. The process as claimed in claim 1 , wherein the Ni to Ni—MgO—ZnO of the catalyst varied in the range of 2 to 10%.

Assignees

• Council Scient Ind Res

Inventors

• Bal Rajaram
• Singha Rajib Kumar
• Pendem Chandrashekar
• Konathala Laxmi Narayan Siva Kumar
• Bordoloi Ankur
• Saran Sandeep

Classifications

• C01B2203/1241

  Natural gas or methane · CPC title

• C01B2203/0238

  the reforming step being a carbon dioxide reforming step · CPC title

• B01J37/08

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

• C01B3/40

  characterised by the catalyst · CPC title

• Y02P20/142

  Cross-Sectional Technologies · mapped topic