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

Amino silane grafted and modified sepiolite adsorbent and preparation method and application thereof

A technology of aminosilane and sepiolite, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of inability to meet the requirements of carbon dioxide capture, high cost of carbon dioxide capture, poor carbon dioxide adsorption effect, etc., and achieve cyclic adsorption Excellent performance, outstanding cycle regeneration adsorption performance, simple and easy preparation process

Inactive Publication Date: 2018-10-16
HUNAN UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current adsorption technology of solid amine materials faces the problem of high cost of carbon dioxide capture. The main reason is that the carriers used in the preparation of solid amine materials in the past are all expensive mesoporous molecular sieves (such as MCM-41, SBA-15, KIT-6, etc. ) kind of porous materials, and the use of relatively low-priced activated carbon materials as a carrier results in poor carbon dioxide adsorption effect and poor thermal stability of solid amine adsorbents, which cannot meet the requirements of industrial flue gas carbon dioxide capture

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
  • Amino silane grafted and modified sepiolite adsorbent and preparation method and application thereof
  • Amino silane grafted and modified sepiolite adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing a sepiolite adsorbent modified by aminosilane grafting, comprising the following steps:

[0026] (1) Pretreatment: Add the industrial sepiolite powder into the hydrochloric acid solution with a concentration of 2mol / L, the solid-liquid ratio is 1:30, and after stirring continuously at room temperature for 15 hours, the solid-liquid separation is carried out, and the filtrate is fully washed until the filtrate is neutral. After drying at 100°C for 12 hours, acid-treated sepiolite was obtained after grinding. Then activate the acid-treated sepiolite at a high temperature of 250° C. for 2 hours to obtain pretreated sepiolite.

[0027] (2) Aminosilane modification: add 6g of pretreated sepiolite to absolute ethanol, so that the solid-to-liquid mass ratio of sepiolite to absolute ethanol is 1:20, and stir evenly. The temperature of the above mixture was raised to 70°C, and 1.2 g of 3-aminopropyltrimethoxysilane (APTS) was slow...

Embodiment 2

[0029] This embodiment provides a method for preparing a sepiolite adsorbent modified by aminosilane grafting, comprising the following steps:

[0030] (1) Pretreatment: Add the industrial sepiolite powder into the hydrochloric acid solution with a concentration of 2mol / L, the solid-liquid ratio is 1:30, and after stirring continuously at room temperature for 15 hours, the solid-liquid separation is carried out, and the filtrate is fully washed until the filtrate is neutral. Dry at 100°C for 12 hours, fully grind and activate at 250°C for 2 hours to obtain pretreated sepiolite.

[0031] (2) Aminosilane modification: add 6 g of pretreated sepiolite to absolute ethanol, so that the solid-to-liquid mass ratio of sepiolite to absolute ethanol is 1:30, and stir evenly. The temperature of the above mixture was raised to 80°C, and 1.2 g of 3-aminopropyltriethoxysilane (APTES) was slowly added, so that the mass ratio of APTES to sepiolite was 1:5, and the reaction was kept under reflu...

Embodiment 3

[0033] This embodiment provides a method for preparing a sepiolite adsorbent modified by aminosilane grafting, comprising the following steps:

[0034] (1) Pretreatment: Add the industrial sepiolite powder into the hydrochloric acid solution with a concentration of 2mol / L, the solid-liquid ratio is 1:30, and after stirring continuously at room temperature for 15 hours, the solid-liquid separation is carried out, and the filtrate is fully washed until the filtrate is neutral. Dry at 100°C for 12 hours, fully grind and activate at 250°C for 2 hours to obtain pretreated sepiolite.

[0035](2) Aminosilane modification: add 6 g of pretreated sepiolite to absolute ethanol, so that the solid-to-liquid mass ratio of sepiolite to absolute ethanol is 1:30, and stir evenly. Raise the temperature of the above mixture to 80°C, slowly add 1.2g of 2-aminoethyl-3-aminopropyltrimethoxysilane (AEAPTS), so that the mass ratio of AEAPTS to sepiolite is 1:5, and keep the reflux reaction for 12 hou...

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
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an amino silane grafted and modified sepiolite adsorbent and a preparation method and application thereof. The method comprises the following steps: (1) adding sepiolite in a hydrochloric acid solution with the concentration being 1-4 mol / L to pre-modifying the sepiolite, and then carrying out thermal activation at the temperature of 200-300 DEG C to obtain pretreated sepiolite; and (2) reacting the pretreated sepiolite with an amino silane coupling agent to obtain the amino silane modified sepiolite adsorbent. While the prepared sepiolite adsorbent has high adsorptioncapacity to carbon dioxide, the cost for capturing carbon dioxide in a solid amine adsorption technology is greatly reduced, and the adsorbent has outstanding cyclic regeneration and adsorption properties, is good in working cycling stability and good in thermal stability.

Description

technical field [0001] The invention relates to the technical field of modification of sepiolite materials, in particular to an aminosilane-modified sepiolite adsorbent and its preparation method and application. Background technique [0002] In recent years, the frequent occurrence of extreme climate events and the increasing number of natural disasters have alerted people to the issue of climate warming. A large amount of greenhouse gas emissions produced by human activities is the main cause of climate warming, and reducing greenhouse gas emissions is of great significance for controlling global climate warming. Carbon dioxide is a major greenhouse gas, which contributes nearly 70% of the damage to the greenhouse effect. The massive combustion of fossil energy is the main reason for the continuous increase of atmospheric carbon dioxide concentration, and reducing carbon dioxide emissions from the fossil energy industry is crucial to slowing down global warming. Therefor...

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): B01J20/28B01J20/30B01J20/22B01D53/02
CPCB01D53/02B01D2253/106B01D2253/20B01J20/10B01J20/22B01J20/28054B01J20/28083B01J2220/46Y02C20/40
Inventor 罗潇袁梦袁树祥梁志武
Owner HUNAN 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