Method for preparing lithium silicate serving as high-temperature CO2 absorbing material

An absorbing material, lithium silicate technology, applied in silicates, alkali metal silicates, chemical instruments and methods, etc., can solve problems that have not yet been seen, achieve environmental protection, reduce CO2 emissions, and low preparation costs. Effect

Inactive Publication Date: 2010-04-21
KUNMING UNIV OF SCI & TECH
0 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0007] So far, it has not been seen to use cheap artificial zeolites as raw materials to prepare high-t...
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

Abstract

The invention discloses a method for preparing lithium silicate material absorbing high-temperature CO2 by taking artificial zeolite as raw material, and provides a process for preparing lithium silicate material serving as high-temperature CO2 absorbent by use of artificial zeolite. Lithium silicate precursors are prepared from LiNO3 and artificial zeolite in different proportions by ion exchange and sol-gel methods, and the lithium silicate material is synthesized by roasting the lithium silicate precursors at a temperature between 600 and 900 DEG C for 2 to 8 hours. The lithium silicate material prepared absorbs CO2 in a thermogravimetric analyzer at a temperature between 400 and 700 DEG C in CO2 and N2 atmosphere in different proportions. Aiming at the problem of a great amount of high-temperature CO2 emitted from power plants and flue gas, the method recycles carbon resources and reduces CO2 emission. The method synthesizes the lithium silicate material by taking cheap artificial zeolite and LiNO3 as raw material and adopting the ion exchange and sol-gel methods. Compared with the prior art, the method has the advantages of cheap and readily available artificial zeolite used as the raw material, reduction in preparation cost of the lithium silicate material and easiness of realizing industrial production.

Application Domain

Technology Topic

Examples

  • Experimental program(6)

Example Embodiment

[0028] Example 1
[0029] Taking lithium nitrate powder with a molar ratio of 4.2 and pretreated artificial zeolite as raw materials, lithium silicate precursor powder was prepared by ion exchange and sol-gel method, and then the precursor powder was calcined at 680°C for 4.5 hours The obtained lithium silicate powder. Put the prepared lithium silicate powder into the thermogravimetric analyzer, in the CO 2 : N 2 =1 (molar ratio) in an atmosphere with a heating rate of 10K/min from 40°C to 635°C (absorption temperature), and constant temperature for 45min for CO 2 Absorption reaction to get CO 2 The absorption capacity is 21.89%.

Example Embodiment

[0030] Example 2
[0031] Referring to Example 1, a lithium silicate material was prepared, and the lithium silicate material was placed in a thermogravimetric analyzer for CO 2 Absorption reaction, the different roasting temperature is 700℃, and CO is obtained 2 The absorption capacity is 16.53%.

Example Embodiment

[0032] Example 3
[0033] Referring to Example 1, a lithium silicate material was prepared, and the lithium silicate material was placed in a thermogravimetric analyzer for CO 2 Absorption reaction, the difference is that the calcination temperature is 850℃ to obtain CO 2 The absorption capacity is 18.65%.
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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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

Similar technology patents

Classification and recommendation of technical efficacy words

  • Low cost of preparation
  • Energy saving

Preparation of microballoons based on microfluid

InactiveCN101279232ALow cost of preparationEasy integration and miniaturizationGranulation by liquid drop formationMicroballoon preparationMicrofluidic channelPolymer chemistry
Owner:NANJING DONGJIAN BIOLOGICAL TECH
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