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Attapulgite lay base composite adsorbent for ammonia adsorption refrigeration and its preparing and use

A composite adsorption and ammonia refrigeration technology, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of unstable adsorption performance, low production cost, and high cost, and achieve good adsorption stability, low price, and stable performance. Effect

Inactive Publication Date: 2007-01-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to propose an attapulgite clay-based composite adsorbent for ammonia refrigeration in order to overcome the disadvantages of the above-mentioned technologies, such as insufficiently stable adsorption performance and high cost. The adsorbent has excellent and stable performance at a relatively low regeneration temperature. At the same time, the production cost is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention is further illustrated by the following examples, which do not limit the scope of the present invention.

[0018] First, dissolve alkaline earth metal chlorides (calcium chloride, strontium chloride or their mixtures, etc.) in water; then add 100-200 mesh attapulgite raw powder, appropriate amount of pore expander and binder, mix evenly, and prepare molding (can Spherical, strip, plate or disk), drying, roasting, become a new type of attapulgite-based composite adsorbent for ammonia refrigeration. The composite adsorbent was tested on a vacuum gravimetric device, and the adsorption capacity was measured at an adsorption temperature of 30°C and an ammonia vapor pressure of 0.56MPa (corresponding to a saturation temperature of liquid ammonia of about 5°C), as shown in Table 1.

[0019] formula

Composition / (% mass)

Adsorption capacity / (kg / kg)

Example 1

Attapulgite

calcium chloride

54

40

...

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Abstract

The present invention relates to adsorbent for ammonia refrigeration, is especially one kind of attapulgite clay base composite adsorbent for ammonia refrigeration and its preparation and application, and belongs to the field of new chemical functional material preparing technology. The composite adsorbent for ammonia refrigeration is prepared through mixing alkali earth chloride, attapulgite clay, pore expanding agent and adhesive in certain proportion, forming in a pelletizing machine, stoving and roasting. The composite adsorbent has the advantages of stable performance, high adsorption stability, etc.

Description

technical field [0001] The invention relates to an adsorption system for ammonia refrigeration and its preparation method and application, in particular to an attapulgite-based composite adsorbent for ammonia refrigeration and its preparation and application, which belongs to the preparation technology of new functional materials in the field of chemical industry. Background technique [0002] Solid adsorption refrigeration can be driven by low-grade heat energy, which can alleviate the tension of power supply, and has the environmental advantages of zero ODP and GWP, so it has attracted widespread attention in the refrigeration industry. In terms of practical application, small-scale products have appeared in the United States, France, Japan, and the United Kingdom. The domestic Shanghai Jiaotong University has also launched a silica gel-water chiller driven by a low-temperature heat source. However, generally speaking, this technology has not yet been industrialized on a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12F25B35/04
Inventor 崔群陈海军姚虎卿
Owner NANJING UNIV OF TECH
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