Metal organic framework/halide composite ammonia adsorbent and preparation method thereof

Abstract

The invention relates to a metal organic framework / halide composite ammonia adsorbent and a preparation method thereof, and belongs to the technical field of new energy materials. The metal organic framework / halide compound ammonia adsorbent is prepared from a preferred metal organic framework and a preferred halide through a solution permeation recrystallization method, and the preferred metal organic framework suspension concentration and the preferred halide solution concentration are adopted; the halide is uniformly adsorbed on the surface of the metal organic framework and in a pore structure, and in the ammonia adsorption / desorption process, the metal organic framework / halide compound ammonia adsorbent captures ammonia at the same time to generate physical-chemical coupling adsorption so as to realize efficient heat storage and refrigeration performance. The metal organic framework / halide compound ammonia adsorbent can effectively solve the problems that a traditional graphite-based compound ammonia adsorbent is low in dipping salt proportion and adsorption capacity, poor in heat and mass transfer capacity in a stacking state and the like, and the metal organic framework / halide compound ammonia adsorbent is applied to an adsorption type refrigeration and heat storage system for the first time; and the performances of high halide impregnation amount, ammonia adsorption amount, heat and mass transfer and the like can be realized.

Description

technical field

[0001] The invention relates to a metal organic framework / halide composite ammonia adsorbent and a preparation method thereof, belonging to the technical field of new energy materials. Background technique

[0002] Adsorption refrigeration or heat storage technology is a high-efficiency energy-saving technology driven by medium and low temperature heat sources such as solar energy or industrial waste heat. It often uses ammonia as a circulating working medium and is prepared as an environmentally friendly refrigeration and heat storage method that does not produce greenhouse effects and ozone holes. attention. Compared with vapor compression systems, adsorption refrigeration or heat storage systems have the advantages of simple structure, no noise, long service life, and low investment and operation costs.

[0003] At present, the use of halides to form complexes to adsorb ammonia has the advantages of non-toxic and harmless, large ammonia adsorption capacit...

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