Method for preparing modified porous alumina decarburizing agent

A technology of porous alumina and decarburizer, applied in chemical instruments and methods, separation methods, alkali metal oxides/hydroxides, etc., can solve the problem of decreasing catalyst utilization rate, reducing the specific surface of absorbent, and uncontrollable loading and other problems, to achieve the effect of obvious synergy, high decarbonization selectivity, and wide range of tunability.

Active Publication Date: 2018-05-01
WUHAN TEXTILE UNIV
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above three methods use metal oxides such as sodium carbonate as active components, ignoring the corrosion damage of the carrier by alkaline metal oxides, thus greatly reducing the specific surface of the absorbent and seriously destroying its pore structure, and the direct impregnation method is extremely It is easy to cause pore blockage, which greatly reduces the decarburization activity and the utilization rate of the catalyst. Moreover, due to the uncontrollable loading capacity, it leads to difficult regeneration and decreased reaction rate, which cannot be ignored.

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
  • Method for preparing modified porous alumina decarburizing agent
  • Method for preparing modified porous alumina decarburizing agent
  • Method for preparing modified porous alumina decarburizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Weigh 0.5mol of AlCl 3 .6H 2 O, 0.05mol of Mg(NO 3 ) 2 , 0.1 mol CaCl 2 , 0.05mol FeSO 4 ,0.02mol of CoCl 2 , 0.03mol CuCl 2 , configured as AlCl 3 .6H 2 O mass fraction is 10% solution A, pours in the 500mL there-necked flask, for subsequent use;

[0039] 2. Weigh 0.2mol diethanolamine (DEA) again, and configure it into lye B with a mass fraction of 10%, for subsequent use;

[0040] 3. Put the three-necked flask containing aluminum chloride hexahydrate solution A in a water bath at 80°C, start stirring at 800r / min, and add lye B to aluminum chloride hexahydrate solution A drop by drop with a constant pressure dropping funnel In the middle, the dropping time is controlled at about 1h, and the control is 7.5

[0041] 4. After the dropwise addition is completed, continue to keep warm and stir for 1 hour, then stop the reaction to obtain a composite colloid, and then place the colloid at the reaction temperature to age for 18 hours

[0042] 5. After t...

Embodiment 2

[0047] According to the same method of embodiment case 1, use monoethanol (MEA) amine to replace diethanolamine to prepare modified porous alumina decarburizer S B

Embodiment 3

[0049] According to the same method of embodiment case 1, use triethanolamine (TEOA) instead of diethanolamine to prepare modified porous alumina decarburizer S C

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing a modified porous alumina decarburizing agent, and belongs to the technical field of environmental protection and chemical industry. According to the method for preparing the modified porous alumina decarburizing agent, composite oxides are prepared by performing co-precipitation on one or more soluble salts of Al<3+>, alkaline earth metal, transitionmetal and other metal, and alkali metal salts and a molecular sieve are adopted as auxiliary agents to mix and dissolve the composite oxides directly in a solution mode. Compared with composite oxides which are obtained by using an ordinary impregnation method and a spray method, the prepared composite oxides have a specific surface area, more uniform pore size distribution, richer active sites and more dispersed active centers, the synergistic effect between the main active component and auxiliary agents is more significant, and the utilization rate of the active component is higher.

Description

technical field [0001] The invention relates to the technical fields of environmental protection and chemical industry, in particular to a preparation method of a modified porous alumina decarburizer. Background technique [0002] With the increasing demand for olefins, the traditional petroleum-based olefins can no longer meet the market demand. my country's energy structure is "rich in coal, short of oil, and low in gas", so coal-to-olefins has gradually become an important way to realize the national strategy of replacing oil with coal. Coal-to-olefins is mainly divided into three steps: coal-to-gas, gas-to-methanol, and methanol-to-olefins. The obtained polymer-grade olefins often still contain traces of acid gases such as carbon dioxide, carbon monoxide, and sulfide. These impurity gases are synthesized Its downstream products will lead to poisoning and deactivation of the catalyst, reduce the selectivity of the catalyst, and then cause a series of problems such as a d...

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): B01J20/08B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2253/104B01D2257/504B01J20/08B01J20/28061B01J20/28073B01J20/28083Y02C20/40
Inventor 夏明桂张腊梅夏王哲王彩凤何秋瑾曲瑞娜夏广王琦王伟明薛志勇吴剑虹陈飞飞
Owner WUHAN TEXTILE UNIV
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