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

Core-shell structured Beta molecular sieve and preparation method thereof

A core-shell structure and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as weak ethanol conversion ability, limited catalytic performance, poor selectivity, etc., to achieve efficient utilization and high ethanol Conversion, hydrogen selectivity, and effect of selectivity reduction

Active Publication Date: 2015-11-04
TAIYUAN DACHENG ENVIRONMENTAL ENERGY CHEM TECH
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ni has a strong ability to break C-C bonds, but for H 2 Poor selectivity; Cu has a good ability to break O-H bonds, H 2 The yield is very low; Fe has good catalytic performance, but the conversion ability for ethanol is weak
So far, the number of patents and documents on the application of molecular sieve-supported catalysts to the hydrogen production reaction of ethanol steam reforming at home and abroad is relatively small, and they are mainly limited to the catalytic performance of a single molecular sieve as a carrier and a single metal active component catalyst.

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
  • Core-shell structured Beta molecular sieve and preparation method thereof
  • Core-shell structured Beta molecular sieve and preparation method thereof
  • Core-shell structured Beta molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 2 mL of deionized water, 37.2 mL of tetraethylammonium hydroxide, and 21.95 mL of silica sol into a polytetrafluoroethylene container, heat to 40°C and stir for 3 hours to form a transparent mixed solution, and add hydrogen dropwise at a rate of 0.1 mL / min Fluoric acid 2.88mL, stirred for 1h, formed a white colloidal mixed solution.

[0030] Put the polytetrafluoroethylene container containing the white colloidal mixed solution into a stainless steel reaction kettle, seal it, place it in a constant temperature box, and heat it to 140°C for static crystallization for 168 hours; take out the reaction kettle and place it in a quenching tank at 10°C The deionized water was rapidly cooled to 20°C; the crystallized gel solution was centrifuged at 8000r / min for 20min, the solid precipitate was retained, placed in a vacuum drying oven, and dried at 100°C for 12h to obtain a white solid product.

[0031] Put the vacuum-dried white solid product in a roasting furnace and roa...

Embodiment 2

[0046] Take 2 mL of deionized water, 37.2 mL of tetraethylammonium hydroxide, and 21.95 mL of silica sol into a polytetrafluoroethylene container, heat to 40°C and stir for 3 hours to form a transparent mixed solution, and add hydrogen dropwise at a rate of 0.1 mL / min Fluoric acid 2.88mL, stirred for 1h, formed a white colloidal mixed solution.

[0047] Put the polytetrafluoroethylene container containing the white colloidal mixed solution into a stainless steel reaction kettle, seal it, place it in a constant temperature box, and heat it to 140°C for static crystallization for 168 hours; take out the reaction kettle and place it in a quenching tank at 10°C The deionized water was rapidly cooled to 20°C; the crystallized gel solution was centrifuged at 8000r / min for 20min, the solid precipitate was retained, placed in a vacuum drying oven, and dried at 100°C for 12h to obtain a white solid.

[0048] Put the vacuum-dried white solid product in a roasting furnace and roast at 55...

Embodiment 3

[0060] Take 3.1mL of deionized water, 40.2mL of tetraethylammonium hydroxide, and 23.3mL of silica sol into a polytetrafluoroethylene container, heat to 40°C and stir for 3 hours to form a transparent mixed solution, and add dropwise at a rate of 0.1mL / min Hydrofluoric acid 2.88mL, stirred for 1h, formed a white colloidal mixed solution.

[0061] Put the polytetrafluoroethylene container containing the white colloidal mixed solution into a stainless steel reaction kettle, seal it, place it in a constant temperature box and heat it to 160°C, and statically crystallize it for 200h; take out the reaction kettle and place it in a quenching tank at 10°C The deionized water was rapidly cooled to 20°C; the crystallized gel solution was centrifuged at 8000r / min for 20min, the solid precipitate was retained, placed in a vacuum drying oven, and dried at 100°C for 12h to obtain a white solid.

[0062] The vacuum-dried white solid product was placed in a roasting furnace, and roasted at 6...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to View More

Abstract

A core-shell structured Beta molecular sieve comprises 70-75wt% of an inner layer Beta molecular sieve core structure and 25-30wt% of an outer layer Beta molecular sieve shell structure wrapped outside the surface of the core structure, total silicon Beta molecular sieve is adopted as the carrier of the inner layer Beta molecular sieve to support copper and / or iron oxide, the copper and / or iron oxide accounts for 3-8% of the mass of the total silicon Beta molecular sieve, the surface of the inner layer Beta molecular sieve is connected with a poly(diallyldimethylammonium chloride) group, and 10-15% of nickel oxide is supported on the outer layer Beta molecular sieve. The core-shell structured Beta molecular sieve utilizing synergism of inner and outer double-layer molecular sieves and supported metal elements has high catalysis activity, and has the advantages of great improvement of the selectivity of a target product hydrogen, and very high ethanol conversion rate and hydrogen selectivity as an ethanol steam reforming hydrogen production catalyst.

Description

technical field [0001] The invention relates to a Beta molecular sieve, in particular to a Beta molecular sieve with a core-shell structure and a preparation method for the Beta molecular sieve. The core-shell structure of the Beta molecular sieve of the present invention is loaded with different metal active components, and can be used as a catalyst for catalytic hydrogen production. Background technique [0002] Since the 21st century, people's demand for energy has been increasing, and the development of new renewable energy and clean energy has become an inevitable trend in future energy development. Among the many renewable energy sources, hydrogen energy is considered as one of the most potential clean alternative energy sources. [0003] At present, hydrogen is mainly produced by steam reforming of methane and electrolysis of water. The reaction process is accompanied by the generation of a large amount of carbon dioxide, which exceeds the balance limit of the enviro...

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
IPC IPC(8): B01J29/76B01J35/02B01J37/10C01B39/04C01B3/32
Inventor 郑子良谢鲜梅杨冬花代蓉王诗瑶
Owner TAIYUAN DACHENG ENVIRONMENTAL ENERGY CHEM 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