Preparation method of composite dehumidification adsorbent paper sheet prepared from MOF material and lithium chloride

A lithium chloride and adsorbent technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of poor hygroscopic performance and high regeneration temperature, and achieve the effect of short regeneration time and low regeneration temperature

Active Publication Date: 2021-05-07
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the rotary dehumidification system, traditional adsorption materials have various disadvantages, such as poor hygroscopic performance, high regeneration temperature, etc.

Method used

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  • Preparation method of composite dehumidification adsorbent paper sheet prepared from MOF material and lithium chloride
  • Preparation method of composite dehumidification adsorbent paper sheet prepared from MOF material and lithium chloride
  • Preparation method of composite dehumidification adsorbent paper sheet prepared from MOF material and lithium chloride

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Embodiment 1

[0044](1) Turn on the constant temperature water bath and keep it stable at 70°C. Weigh 698.8g of aluminum sulfate octadecahydrate and dissolve it in 2.4L of water, stir it in a constant temperature water bath for 30min until it is completely dissolved, and record it as solution A; weigh 244g of fumaric acid and 253.2g of sodium hydroxide and dissolve it in 3.6L of water, stir 15 minutes to complete dissolution, recorded as solution B; drop solution B into solution A, and stir for 3 hours. The above solution was left to stand, centrifuged, and washed with water three times. Dry at 80°C for 10 hours to obtain the crude product, and activate at 100°C for 6 hours to obtain aluminum fumarate powder. Using this ratio can prepare 400g of aluminum fumarate once.

[0045] (2) Cut the glass fiber paper into a square of 10×10mm, weigh a certain amount of aluminum fumarate powder and dissolve it in water, add a certain volume of silica sol solution to it, and stir magnetically for 30 m...

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Abstract

The invention discloses a preparation method of a composite dehumidification adsorbent paper sheet prepared from an MOF material and lithium chloride. The method comprises the following steps: 1) synthesizing a large amount of the MOF material; 2) dipping fiber paper in a mixed solution formed by the MOF material and silica sol so as to form an MOF layer, taking out the fiber paper after the fiber paper is completely wetted, and airing and drying the fiber paper; and 3) dipping the fiber paper with the MOF layer material in a mixed solution formed by polyvinyl alcohol and lithium chloride again, taking out the fiber paper after the fiber paper is completely wetted, and airing and drying the fiber paper to form a lithium chloride layer, thereby obtaining the composite material dehumidification adsorbent paper sheet. According to the adsorbent paper sheet provided by the invention, the equilibrium adsorption capacity of the adsorbent paper sheet can reach 1.8 g/g, a regeneration temperature is 50-80 DEG C, film-like substances exist on the surface of the adsorbent paper sheet, and the problem of powder falling can be effectively reduced. The paper sheet can be processed into a honeycomb shape and is suitable for adsorption type rotary wheel dehumidification and heat recovery under the conditions of different humidity and low regeneration temperature.

Description

technical field [0001] The invention relates to a composite dehumidification adsorbent paper sheet based on MOF and lithium chloride material and a preparation method thereof, belonging to the field of adsorption and dehumidification. Background technique [0002] Humidity is one of the important factors affecting the thermal comfort of indoor occupants, air quality and building health. The rotary dehumidification system is widely used in various occasions due to its advantages of high dehumidification efficiency and large moisture absorption area. However, in the rotary dehumidification system, traditional adsorption materials have various disadvantages, such as poor hygroscopic performance and high regeneration temperature. In addition, the size of the rotor of the household rotary dehumidifier is also limited due to the influence of the product volume. In summary, it is imperative to develop an adsorbent with high adsorption and low regeneration temperature. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/06B01D53/26
CPCB01J20/226B01J20/027B01D53/06B01D53/261B01J2220/46B01D2253/20B01D2253/112
Inventor 刘忠宝程超杰韩君地
Owner BEIJING UNIV OF TECH
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