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Geopolymer molecular sieve, preparation method and application

A polymer and molecular sieve technology, which is applied in the direction of molecular sieve compounds, molecular sieve catalysts, molecular sieves and base exchange compounds, etc., can solve the problem of single diffusion limitation of sieve structure, achieve the effect of fluffy structure and improved capacity

Pending Publication Date: 2021-05-28
西安建筑科技大学华清学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects and deficiencies in the prior art, the present invention provides a gasification slag-based geopolymer molecular sieve, its preparation method and its application to solve the problem of diffusion limitation in the prior art due to the single pore structure of the geopolymer molecular sieve. Technical problem, to provide a porous grade geopolymer molecular sieve with microporous-mesoporous structure

Method used

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  • Geopolymer molecular sieve, preparation method and application
  • Geopolymer molecular sieve, preparation method and application
  • Geopolymer molecular sieve, preparation method and application

Examples

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Embodiment 1

[0060]In the present embodiment, the gasified slag, a silica sol, and alkaline excitation agent is raw, and the content of the gasified slag is 17.24%, the silica sol content is 34.8%, and the content of the basic excitation agent is 48.28. %, The amount of the gasified slag, silica sol with the alkaline excitation agent is 100%. The coal gasification slag is mechanically polished, and the water-soluble impurities are passed through mechanically polished, and the water-soluble impurity is washed, and the cooling is baked; the mass fraction of the pretreated gasifier slag and the NaOH will be in normal temperature. The mixture was mixed and mixed, and the reaction was obtained at 120 ° C to 150 ° C, and the reaction was obtained after the reaction was obtained; the material obtained by the material obtained by the substrate was separated, and the silica sol were added to the isolated filtrate, mixed uniform and stirred to the stick. The thickness appears; the resulting material is po...

Embodiment 2

[0065]The present embodiment is different from that of the first embodiment: the crystallization time is 10 h, the other test parameters and the preparation step are the same as in Example 1, and finally obtain a gasified slag base polymer molecular sieve.

[0066]Such asFigure 4 As shown, the gasification slag base polymer molecular sieve prepared in Example 2 is irregular particulate shape, and the surface distribution has a relatively intensive and size of different sizes. The pore distribution of the molecular sieve is more dense compared to Example 1.

[0067]Analysis of results:

[0068]Such asimage 3 As shown, it is detected that the ingredients contained in the gasified slag base polymer molecular sieve contained in the present embodiment include aluminum silicate calcium CaO · Al2O3· 3Sio2, Calcium aluminate Cao · Al2O3.

Embodiment 3

[0070]In this embodiment, the first embodiment is that the crystallization time is 12 h, the other test parameters and the preparation step are the same as in Example 1, and finally obtain a gasified slag base polymer molecular sieve.

[0071]Such asFigure 6 As shown, the gasified slag base polymer molecular sieve surface prepared in Example 3 is relatively flat, and the surface particle portion is irregular four-sided shape, and the part is a scales; the increase in magnification can also be observed. The pore distribution of the molecular sieve is more dense compared to Example 1.

[0072]Analysis of results:

[0073]Such asFigure 5 As shown, it is detected that the ingredients contained in the gasified slag base polymer molecular sieve contained in the present embodiment include aluminum silicate calcium CaO · Al2O3· 3Sio2, Calcium aluminate Cao · Al2O3.

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Abstract

The invention discloses a gasification slag-based geopolymer molecular sieve, a preparation method and application thereof. The preparation method adopts coal gasification slag, silica sol and an alkaline activator as raw materials, and adopts a hydrothermal synthesis method to prepare the gasification slag-based geopolymer molecular sieve. The invention also discloses application of the prepared gasification slag-based geopolymer molecular sieve in adsorption of heavy metal ions Cu<2+>. According to the invention, the technical problem of diffusion limitation caused by single pore structure of the geopolymer molecular sieve in the prior art is solved, and the porous geopolymer molecular sieve with the micropore-mesopore structure is provided; and the solid foundation is provided for researching the heavy metal ion curing capacity of the gasification slag-based geopolymer molecular sieve, exploring the curing mechanism of the molecular sieve on the heavy metal ions and applying the molecular sieve as a novel material in the catalysis field.

Description

Technical field[0001]The present invention relates to the field of inorganic non-metallic materials, and more particularly to a gasified slag base polymer molecular sieve, preparation method and application.Background technique[0002]As one of the important means of coal cleaning and utilization, coal gasification technology is the core technology of coal efficient use, but this technology is also an important source of waste. The reduction of gas-sagging, resource utilization technology is to achieve coal gasization, enterprises to reduce the cost, economic efficiency and environmental efficiency of gas wasteland.[0003]Gas-slag is mainly composed of silicate glass such as calcium oxide, iron oxide and silica, in excitation agent NaOH, KOH or NA2SiO3Under the action, the silicate glass body in the gas slag is polymerized to form an oligomer, dimer or monomer of a silicate or an aluminate; an alkaline environment, and the polymerized small molecule is rerouped. Generation by [SIO4]4-T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C01B37/00C01B39/00C01B39/02B01J29/70B01J35/10B01J37/10B01J20/16B01J20/28B01J20/30C02F1/28C02F101/20
CPCC01B33/26C01B37/00C01B39/00C01B39/02B01J20/16B01J20/28042C02F1/281B01J29/70B01J37/10C02F2101/20B01J35/60B01J35/39Y02P40/10
Inventor 杨潘杨柳吴伟奇张海贵王丹张丽敏柴倩王静怡
Owner 西安建筑科技大学华清学院
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