Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A sepiolite-alumina composite carrier and a high temperature resistant sintering methanation catalyst using it

A composite carrier and alumina technology, which is applied in the direction of carbon compound catalysts, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the complicated preparation steps, the decrease of specific surface area, and the limitation of heat resistance and other problems to achieve the effect of improving the collapse of the pore structure, improving the stability and stabilizing the pore structure

Active Publication Date: 2022-01-25
XINDI ENERGY ENG TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the modification methods of sepiolite mainly include acid modification, thermal modification, organic modification, salt modification, ion exchange modification, hydrothermal treatment modification, etc., but pure modified sepiolite is used as a carrier for its heat resistance The performance is still limited. Under the condition of high temperature above 600℃, the hydroxyl water is easily lost, causing the structure to collapse and the specific surface area to decrease. Adding alumina can improve the heat resistance stability of the carrier.
Patent CN107020099A discloses a kind of NiAl 2 o 4 / The preparation method of sepiolite high temperature resistant supported catalyst needs to prepare NiAl 2 o 4 , to prepare modified sepiolite nanofibers, and due to the high reduction temperature of nickel-aluminum spinel, high-temperature reduction is required, the overall preparation steps are complicated, and the finished catalyst production is relatively high

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
  • A sepiolite-alumina composite carrier and a high temperature resistant sintering methanation catalyst using it
  • A sepiolite-alumina composite carrier and a high temperature resistant sintering methanation catalyst using it
  • A sepiolite-alumina composite carrier and a high temperature resistant sintering methanation catalyst using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of sepiolite-alumina carrier: Mix (A) g of sepiolite, (B) g of aluminum hydroxide powder and (C) g of squid powder in a kneader, and (D) mol / L dilute nitric acid (E) ml was added to the above mixture and kneaded for 30 minutes, then (F) g of pseudo-boehmite was added to the above mixture, and kneaded for 10 minutes. Dry the obtained solid mixture in a blower dryer at 120°C for 2 hours, grind and granulate, sieve through a 24-mesh standard sieve, add magnesium stearate (G)g of the total amount of material, and form into tablets, with a size of Φ5 *5-7mm, about 240g of sepiolite-alumina composite carrier was obtained after roasting at (H)°C for 3 hours. The specific preparation parameters and physical adsorption data are shown in the following table: The water absorption rate of the carrier is measured by taking 20g (W1) of the carrier, soaking it in deionized water at room temperature for 2 hours, filtering out the excess deionized water, and then drying the...

Embodiment 2

[0052] Preparation of sepiolite-alumina carrier: the carrier ZT-1 in Example 1 was selected.

[0053] Preparation of catalyst precursor for nickel-based methane synthesis: Weigh 50g of the carrier, weigh 91.76g of nickel nitrate hexahydrate, and 9.84g of cerium nitrate hexahydrate, dissolve them in deionized water together, and prepare 100ml of immersion solution, and heat the immersion solution in a water bath To a temperature of 65°C, pour the carrier into the impregnation solution, impregnate for 2 hours, filter, dry in a blast drying oven at 110°C for 5 hours, and after two dipping and drying, bake in a muffle furnace at 600°C 4h to obtain the catalyst precursor.

[0054] The preparation of nickel base methane synthesis catalyst: according to the method for embodiment 1, the catalyst precursor is flowed in the H of 500ml / min 2 In the hydrogen-nitrogen mixed gas atmosphere with a content of 80%, the reduction is carried out under the conditions of a reduction temperature o...

Embodiment 3

[0056] Preparation of sepiolite-alumina carrier: the carrier ZT-1 in Example 1 was selected.

[0057] Preparation of catalyst precursor for nickel-based methane synthesis: Weigh 50g of the carrier, weigh 68.12g of nickel nitrate hexahydrate, and 4.38g of samarium nitrate hexahydrate, dissolve them in deionized water together, and prepare 100ml of impregnation solution, and heat the impregnation solution in a water bath To a temperature of 65°C, pour the carrier into the impregnation solution, impregnate for 2 hours, filter, dry in a blast drying oven at 110°C for 5 hours, and after two dipping and drying, bake in a muffle furnace at 650°C 4h to obtain the catalyst precursor.

[0058] Preparation of nickel-based methane synthesis catalyst: According to the method of Example 1, the catalyst precursor was reduced in a pure hydrogen atmosphere with a flow rate of 500ml / min, the reduction temperature was 600°C and the reduction time was 5h, and then passivation was carried out. Ca...

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 discloses a sepiolite-alumina composite carrier and a high temperature resistant sintering type methanation catalyst using the same. The methanation catalyst uses sepiolite-alumina as the carrier, supports nickel as the active component, and adds rare earth metal additives. The preparation process is simple, and it is especially suitable for industrial scale-up production.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, and in particular relates to a sepiolite-alumina composite carrier, a high-temperature-resistant sintering-type methanation catalyst using the same, and a preparation method thereof. Background technique [0002] The methanation reaction is a strong exothermic reaction in which carbon oxides and hydrogen generate methane under the action of a catalyst. It is widely used in the production of synthetic natural gas using coal-based synthesis gas, coke oven gas, and semi-coke tail gas. At present, the methane synthesis process is relatively mature, and it is generally completed using three to four reactors. In order to make full use of the reaction heat to obtain high-grade heat energy, the first and second reactors generally have the characteristics of high temperature and high load, and the hot spot temperature can be adjusted. As high as 600°C or higher, the catalyst used in the reac...

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): B01J21/16B01J32/00B01J35/10B01J23/83C07C1/04C07C9/04
CPCC07C1/0435B01J21/16B01J23/002B01J23/83B01J35/1019C07C2523/83B01J2523/00B01J2523/31B01J2523/3712B01J2523/41B01J2523/847B01J2523/3737C07C9/04
Inventor 史立杰堵俊俊张伟康刘鹏翔高珠李晨佳常俊石
Owner XINDI ENERGY ENG TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com