Composite moisture absorption material based on carbon base and calcium chloride and preparation method thereof

A technology for hygroscopic materials and carbon-based materials, which is applied in chemical instruments and methods, separation methods, and other chemical processes, etc., can solve the problems of loss of hygroscopic agent, poor hygroscopic effect, and low adsorption capacity, and achieves low cost and stable physicochemical properties. , the effect of increasing the specific surface area

Inactive Publication Date: 2011-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional porous materials are mainly combined with water vapor through physical adsorption, and their moisture absorption speed is fast, but their adsorption capacity is generally low, and their moisture absorption effect is poor.
Simple inorganic hygroscopic salts have strong hygroscopic performance, and the interaction with water vapor is mainly chemical adsorption and solution absorption. However, after absorbing moisture, they will be liquefied, causing calcium chloride to dissolve into a solution and overflow from the carrier, which will easily cause the loss of hygroscopic agent. And problems such as corrosion equipment, so its application has great limitations

Method used

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  • Composite moisture absorption material based on carbon base and calcium chloride and preparation method thereof
  • Composite moisture absorption material based on carbon base and calcium chloride and preparation method thereof
  • Composite moisture absorption material based on carbon base and calcium chloride and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Activated carbon granular carbon base (specific surface area is 500m 2 / g, the bulk density is 0.5g / cm 3 , particle size is 4 orders), and 10%, 20%, 30%, the calcium chloride solution soaking of 40% mass concentration, the mass ratio of activated carbon granular carbon base and calcium chloride is 36: 31, and soaking time is 12 hours, Soaking condition is normal temperature 25 ℃, isolated from air. The soaked solid mixture was filtered and put into a constant temperature drying oven to dry for 12 hours under a drying condition of 120°C. Composite hygroscopic materials with different calcium chloride contents are thus prepared.

[0025] Under the following conditions: set the temperature of the constant temperature and humidity test box to 20°C, and the relative humidity to 50%. After the temperature and humidity in the box are stabilized, various hygroscopic materials prepared by combining activated carbon and calcium chloride are put into the box. Within a certain p...

Embodiment 2

[0029] Activated carbon fiber carbon base (specific surface area is 1000m 2 / g), with 10%, 20%, 30%, the calcium chloride solution soaking of 40% mass concentration, the mass ratio of activated carbon fiber carbon base and calcium chloride is 13: 40, and soaking time is 12 hours, and soaking condition is Room temperature 25°C, isolated from air. The soaked solid mixture was filtered and put into a constant temperature drying oven to dry for 12 hours under a drying condition of 120°C. Composite hygroscopic materials with different calcium chloride contents are thus prepared.

[0030] Under the following conditions: set the temperature of the constant temperature and humidity test box to 20°C, and the relative humidity to 50%. After the temperature and humidity in the box are stabilized, various hygroscopic materials prepared by combining activated carbon and calcium chloride are put into the box. Within a certain period of time, the weight of the hygroscopic agent is measured...

Embodiment 3

[0034] Activated carbon granular carbon base (the specific surface area of ​​activated carbon particles is 600m 2 / g, the bulk density is 0.6g / cm 3 , particle size is 10 orders), and 10%, 20%, 30%, the calcium chloride solution soaking of 40% mass concentration, the mass ratio of activated carbon granular carbon base and calcium chloride is 15: 1, and soaking time is 24 hours, Soaking condition is normal temperature 25 ℃, isolated from air. Filter the solid mixture after soaking, and put it into a constant temperature drying oven to dry for 24 hours under the drying condition of 140°C. Composite hygroscopic materials with different calcium chloride contents are thus prepared.

[0035] The temperature of the constant temperature and humidity test chamber is set at 20°C, and the relative humidity is 30%, 40%, 50%, 60%, 70%, 80%, and 90%. Measure the equilibrium moisture absorption of activated carbon-calcium chloride composite hygroscopic material at various relative humidity...

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Abstract

The invention relates to a composite moisture absorption material based on a carbon base and calcium chloride and a preparation method thereof. The composite moisture absorption material comprises a carbon base material and calcium chloride, wherein the carbon base material is activated carbon particles or activated carbon fibers, the mass ratio of the activated carbon particles to the calcium chloride is 36:31-15:1, and the mass ratio of the activated carbon fibers to the calcium chloride is 13:40-5:23. The preparation method comprises the following steps of: soaking the activated carbon particles or the activated carbon fibers in calcium chloride solution with the mass percent concentration of 10%-40% in a vacuum normal temperature for 12-24 hours through an immersion method, and then drying at a temperature of 120-140DEG C for 12-24 hours to obtain the composite moisture absorption material. The composite moisture absorption material has strong moisture absorption capability, stable physicochemical property and strong practicability. The preparation method has the advantages of simple technology, low cost and good application prospect.

Description

technical field [0001] The invention belongs to the field of composite hygroscopic material and its preparation, in particular to a composite hygroscopic material based on carbon base and calcium chloride and a preparation method thereof. Background technique [0002] In the field of air conditioning and dehumidification, solid adsorbents have been widely used due to the large energy consumption of conventional mechanical condensation dehumidification technology and the adverse effects of the refrigerant on the environment. The use of solid adsorption dehumidification can realize independent control of temperature and humidity, effectively utilize waste heat, has certain energy saving properties, and can improve indoor air quality. In addition, adsorption refrigeration technology has emerged in recent years, and various adsorbents and water have been widely studied as their working pairs. The main core technology is the adsorption-desorption cycle of adsorbent-adsorbate. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32B01D53/28
Inventor 苏亚欣石成君耿浩清
Owner DONGHUA UNIV
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