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

Catalyst and its prepn process and use

A catalyst and catalyst carrier technology, applied in the production of bulk chemicals, hydrogen production, etc., to achieve the effects of high catalytic activity, wide range of raw materials, and good catalytic performance

Inactive Publication Date: 2003-09-10
WUHAN UNIV
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve high-efficiency hydrogen production under normal temperature and pressure conditions, its wide application is limited due to the use of precious metals such as Pt, Pd, Ru or hard-to-activate metals such as Co and Ni.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: with 11.9g NiCl 2 ·6H 2 O was dissolved in double distilled water to form a 6wt% aqueous solution, and 16g of high specific surface activated carbon was added under constant stirring, the mixture was placed in an ice-water bath and cooled to below 10°C, then slowly added dropwise excess 5wt% sodium borohydride aqueous solution , keeping the reaction temperature below 10°C, through the chemical oxidation-reduction reaction to generate nickel boride precipitates, which are evenly dispersed on the surface of the porous carrier, after the reaction is complete, the loaded catalyst powder is centrifugally filtered and washed, and placed in a vacuum at 150°C The catalyst required by the present invention can be obtained by drying for 24 hours under normal conditions or in an inert atmosphere. The loading of the resulting highly dispersed catalyst was about 20 wt%. Its reaction formula is as follows:

[0015]

Embodiment 2

[0016] Example 2: Dissolve 3.04g of ferric nitrate in twice-distilled water to form a 10wt% aqueous solution, add 0.3g of high specific surface acetylene black under constant stirring, place the mixture in an ice-water bath and cool it to 2°C, then slowly drop Add 15wt% potassium borohydride alkaline aqueous solution, produce iron boride precipitation through chemical oxidation-reduction reaction, evenly disperse on the surface of the porous carrier, after the reaction is complete, centrifugally filter and wash the loaded catalyst powder, and dry it in an air atmosphere dry to obtain the desired catalyst of the present invention. The loading of the resulting highly dispersed catalyst was about 80 wt%.

Embodiment 3

[0017] Example 3: Dissolve 6.0 g of cobalt sulfate in twice-distilled water to form a 30% solution, add about 25 g of β-alumina with a high specific surface area, stir for 0.5 h to make it evenly mixed, and place the mixture in an ice-water bath Cool to about 0°C, slowly add 11.4g of 20% (weight percent) sodium borohydride alkaline aqueous solution, and form a cobalt boride precipitate through a chemical oxidation-reduction reaction, which is evenly dispersed on the surface of β-alumina. After the reaction is complete, The loaded catalyst powder was filtered and dried at 250° C. for 12 hours under an argon atmosphere to obtain the desired catalyst of the present invention. The loading of the resulting highly dispersed catalyst was about 5 wt%.

[0018] Similar catalysts can be obtained by replacing the transition metal salts, metal borohydrides, and catalyst supports in the above examples with other transition metal salts, metal borohydrides, and catalyst supports described in...

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 catalyst has porous material carrier and is prepared through chemical deposition of high-dispersivity metal boride. The preparation process includes adding powdered porous material as catalyst carrier into the aqueous solution of transition metal salt via stirring; dropping aqueous solution of metal borohydride or alkala aqueous solution at -5 deg.c to 10 deg.c to produce transition metal boride deposited homogeneously onto the surface of the carrier through chemical oxidation; and washing and drying the carried catalyst powder. The catalyst is used in producing hydrogen through the hydrolysis of borohydride and has excellent catalytic performance especially in alkali condition. The catalyst is cheap and has high catalytic activity in wide composition range.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application. Background technique [0002] Hydrogen-oxygen (air) fuel cell is a clean and efficient power generation device with high specific energy, long cycle life and no pollution. It is an ideal supporting power source for many advanced mobile electronic products and electric vehicles. At present, the technology of hydrogen-oxygen (air) fuel cell is quite mature, but one of the main reasons hindering its wide application is the lack of efficient hydrogen source. Over the years, people have used technologies such as hydrogen storage alloy hydrogen storage, carbon nanotube hydrogen storage, organic matter catalysis or chemical cracking hydrogen production to build mobile hydrogen generators, but these methods and technologies require harsh hydrogen absorption and desorption conditions or low hydrogen production (Generally <3wt%) can not meet the application requirements. The hyd...

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 Applications(China)
IPC IPC(8): C01B3/04
CPCY02E60/364Y02E60/36Y02P20/52
Inventor 杨汉西董华艾新平
Owner WUHAN UNIV
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