Shift catalyst using cobalt-magnesium-aluminum hydrotalcite as precursor and preparation method thereof

A technology of cobalt-magnesium-aluminum and hydrotalcite is applied in the field of sulfur-resistant shift catalyst and its preparation, which can solve the problems of inapplicability of low-temperature shift process and poor low-temperature activity, achieve uniform distribution of surface alkalinity, improve low-temperature activity, and resist hydration strong effect

Active Publication Date: 2017-04-05
中琉科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the poor low-temperature activity of magnesium-aluminum spinel as a carrier catalyst in the prior art, which cannot be applied to low-temperature conversion processes below 350°C, thereby providing a cobalt-magnesium-aluminum-based Hydrotalcite as precursor, sulfur-resistant shift catalyst applicable to wide temperature range of 250-450°C and preparation method thereof

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shift catalyst using cobalt-magnesium-aluminum hydrotalcite as precursor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a sulfur-tolerant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor, which uses CoMgAl-LDO as a carrier and MoO 3 It is the active component, and the active component after sulfidation is Co-Mo-S phase.

[0029] The preparation method of the sulfur-resistant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor comprises the following steps:

[0030] (1) Weigh 9.3783g of Al(NO 3 ) 2 9H 2 O, 0.1455g of Co(NO 3 ) 2 ·6H 2 O, 12.6923g of Mg(NO 3 ) 2 ·6H 2 O and mix it evenly, fully dissolve it in 250ml deionized water, and ultrasonically disperse it for 10min after dissolving to form the first mixed solution. 2+ and Mg 2+ The sum of the amount of substance and Al 3+ The ratio of the amount of substance is 2:1, and Co 2+ and Mg 2+ The sum of the amount of substance and Co 2+ The ratio of the amount of substances is 100:1;

[0031] (2) Weigh 6.4g sodium hydroxide and 2.65g sodium carbonate r...

Embodiment 2

[0036] This embodiment provides a sulfur-tolerant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor, which uses CoMgAl-LDO as a carrier and MoO 3 It is the active component, and the active component after sulfidation is Co-Mo-S phase.

[0037] The preparation method of the sulfur-resistant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor comprises the following steps:

[0038] (1) Weigh 4.5268g of AlCl respectively 3 ·6H 2 O, 0.7749g of 2CoCO 3 3Co(OH) 2 , 13.4479g of MgSO 4 ·7H 2 O and mix it evenly, fully dissolve it in 250ml deionized water, and ultrasonically disperse it for 10min after dissolving to form the first mixed solution. 2+ and Mg 2+ The sum of the amount of substance and Al 3+ The ratio of the amount of substance is 2:1, and Co 2+ and Mg 2+ The sum of the amount of substance and Co 2+ The ratio of the amount of substances is 100:3;

[0039] (2) Weigh 6.4g sodium hydroxide and 2.65g sodium carbonate r...

Embodiment 3

[0044] This embodiment provides a sulfur-tolerant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor, which uses CoMgAl-LDO as a carrier and MoO 3 It is the active component, and the active component after sulfidation is Co-Mo-S phase.

[0045] The preparation method of the sulfur-resistant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor comprises the following steps:

[0046] (1) Weigh 12.4953g of Al respectively 2 (SO 4 ) 3 18H 2 O, 0.4621 g of (HCOO) 2 Co 2H 2 O, 10.8632 g of MgCl 2 ·6H 2 O and mix it evenly, fully dissolve it in 250ml deionized water, and ultrasonically disperse it for 10min after dissolving to form the first mixed solution. 2+ and Mg 2+ The sum of the amount of substance and Al 3+ The ratio of the amount of substance is 2:1, and Co 2+ and Mg 2+ The sum of the amount of substance and Co 2+ The ratio of the amount of substances is 100:5;

[0047] (2) Weigh 6.4g sodium hydroxide and 2.65g sodiu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a sulfur-tolerant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor, using CoMgAl-LDO as a carrier, and using MoO3 as an active component. The carrier CoMgAl-LDO is based on cobalt-magnesium-aluminum hydrotalcite. The precursor is prepared after roasting, and has the characteristics of uniform cobalt dispersion, suitable surface alkalinity and uniform distribution of pore structure. The catalyst prepared by further using the carrier CoMgAl-LDO to impregnate the Mo active component can make the Co and Mo components All are highly dispersed, in which the Co component is evenly distributed in the interior and surface of the catalyst carrier, and a good interaction is formed between Co and Mo, and the catalyst has high catalytic activity in a wide temperature range of 250-450°C , high thermal stability, strong hydration resistance, not only suitable for high temperature, high pressure and high steam-gas ratio conversion conditions, but also suitable for medium pressure and low temperature conversion process.

Description

technical field [0001] The invention relates to the field of water-gas shift catalysts, in particular to a sulfur-resistant shift catalyst using cobalt-magnesium-aluminum hydrotalcite as a precursor and a preparation method thereof. Background technique [0002] In recent years, due to the restriction and influence of changes in the energy structure, most of the new nitrogen fertilizer plants in my country use coal or residual oil as raw materials, and the large and medium-sized nitrogen fertilizer plants that were built and put into operation in the early 1970s with light oil as raw materials have also been expanded to more than Coal is the raw material. In the design of these devices, in consideration of low investment and quick results, a new process flow of 4.0MPa gasification gas generation, three-stage sulfur-resistant conversion, that is, medium-to-sequence low-change, and methanation purification is mostly used. Due to the high pressure and low temperature of the low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
Inventor 江莉龙曹彦宁米金星
Owner 中琉科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap