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A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite

A mesoporous material and organic framework technology, applied in the field of metal-organic framework compound@mesoporous material composite material and its preparation, can solve the problems of equipment corrosion, easy decomposition and deformation, high energy consumption of liquid ammonia adsorption method regeneration, and achieve excellent The effect of high temperature resistance and water resistance, simple preparation method and process, suitable for large-scale production

Active Publication Date: 2017-06-20
WEIFANG UNIVERSITY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] In CCS technology, CO 2 The capture stage is the most expensive part of this technology, accounting for more than 70% of the total cost of CCS technology, because the regeneration energy consumption of the existing liquid ammonia adsorption method is too high
In addition, the chemical absorption method also has disadvantages such as equipment corrosion.
In related technologies, some adsorbents are used for CO 2 However, flue gas is a kind of high-temperature gas, which may also contain some moisture, and the partial pressure of carbon dioxide is low. For adsorbents, in an environment with low partial pressure of carbon dioxide, the adsorption efficiency is limited. In addition, in high-temperature environments, The adsorbent is also easy to decompose and denature, and the effective time is very short. Some adsorbents have poor water resistance and are easily decomposed and deformed by the moisture in the flue gas, which seriously shortens the service life of the adsorbent.

Method used

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  • A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite
  • A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite
  • A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite

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preparation example Construction

[0078] In a preferred embodiment of the present invention, the preparation method of the silica mesoporous foam material comprises:

[0079] Dissolve P123 in water, add concentrated hydrochloric acid, add mesitylene (TMB) after heating and stirring, add tetraethyl orthosilicate (TEOS) after stirring, and continue heating; collect and seal the obtained liquid product, heat and crystallize to obtain a mesoporous material .

[0080] In a preferred embodiment of the present invention, the mass ratio of P123, concentrated hydrochloric acid, mesitylene and ethyl orthosilicate is 8:40-50:2-12:10-20, preferably 8:45- 50:6-10:15-20, more preferably 8:50:6:17.

[0081] The use of specific raw materials and dosage is helpful to obtain mesoporous materials with fixed pore size and structure, which is conducive to the transmission of carbon dioxide, fully contacting the metal-organic framework compounds loaded inside the mesoporous materials, and the complex pore structure is also increas...

Embodiment 1

[0138] Dissolve 8g of P123 in 250mL of deionized water, add 45g of concentrated hydrochloric acid with a mass fraction of 36% to 38%, heat and stir in a water bath at 40°C for 3 hours, then add 12g of TMB, continue stirring for 3 hours, and then add 10g of TEOS produced a milky white colloidal solution, and continued stirring at 40°C for 48h, then filled the liquid into a polytetrafluoroethylene-lined white steel tank, and placed it in an oven at 80°C for crystallization for 48h. After filtering, washing and drying, MCF was obtained. Denoted as MCF-1, in a simulated flue gas environment, using a fixed bed, test its CO at 30°C and 60°C 2 Adsorption capacity. See Table 2 for the data.

Embodiment 2

[0140] Dissolve 8g of P123 in 250mL of deionized water, add 40g of concentrated hydrochloric acid with a mass fraction of 36% to 38%, heat and stir in a water bath at 50°C for 2 hours, then add 2g of TMB, continue stirring for 2 hours, and then add 20g of TEOS produced a milky white colloidal solution, and continued stirring at 40°C for 36h, then filled the liquid into a polytetrafluoroethylene-lined white steel tank, and placed it in an oven at 100°C for crystallization for 36h. After filtering, washing and drying, MCF was obtained. Denoted as MCF-2, in a simulated flue gas environment, using a fixed bed, test its CO at 30°C and 60°C 2 Adsorption capacity. See Table 2 for the data.

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Abstract

A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite are provided. According to the composite, a metal-organic framework compound is distributed in pore passages of a mesoporous material, CO2 adsorbability of the metal-organic framework compound is fully utilized, a developed network pore passage structure of the mesoporous material also facilitates CO2 gas molecular diffusion, the metal-organic framework compound distributed in the pore passages can be in full contact with CO2 gas, and the mesoporous material can effectively delay decomposition and degeneration of the metal-organic framework compound in a flue gas environment and prolongs the service life time of an adsorption material, and therefore the composite can have excellent high-temperature resistance and water tolerance. The preparing method is simple in process, and suitable for large-scale production. The composite can be adopted as a CO2 adsorbent, is particularly used for adsorbing CO2 in flue gas, and can be used stably for long time in the flue gas environment.

Description

technical field [0001] The present invention relates to the technical field of carbon dioxide adsorption, in particular to a metal-organic framework compound@mesoporous material composite material and its preparation method and application. Background technique [0002] Atmospheric CO due to anthropogenic emissions 2 The sharp increase in concentration is one of the huge environmental problems facing mankind at present. 80% of the world's CO 2 It comes from the combustion of coal, oil, and natural gas. Due to the needs of economic growth and industrial development, CO 2 Emissions will grow further. In 2013, the United Nations Intergovernmental Panel on Climate Change (IPCC) released its fifth assessment report on global warming trends. According to the report, in the 100 years from 1901 to 2012, the global surface temperature increased by 0.89°C. The first decade of this century was the hottest decade on record, but it is expected that the global surface temperature wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01D2258/0283B01J20/226B01J20/28083Y02C20/40
Inventor 辛春玲
Owner WEIFANG UNIVERSITY
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