Application of metal-organic framework in adsorption type heat pump distillation

Abstract

A heat pump adsorption bed heat exchanger in a metal-organic framework adsorption heat pump distillation system is characterized in that the metal-organic framework is MIL-53(Al)[Al(OH).(O2C-C6H4-CO2)], MIL-101{Cr3F(H2O)2O[C6H4(CO2)2]3}, Cu-BTC[Cu3(btc)2], Na-rho-ZMOF[In48(C5N2O4H2)96Na48(C2H5OH)96(H2O)192], MOF-177[Zn4O(btb)2] or ISE-1{[Ni3(mu3-btc)2(mu-btre)2(mu-H2O)2](H2O)22}; in situ synthesis of a metal-organic framework adsorbent coating is carried out on a carrier on the wall surface of the heat pump adsorption bed heat exchanger; and an adsorption heat pump working medium which matches the metal-organic framework is methanol, ethanol, carbon dioxide or propane. The metal-organic framework adsorbent used in the adsorption type heat pump distillation process is characterized by controllable aperture dimension and adjustable function group on the aperture surface and surface potential energy and the like. The adsorption of the metal-organic framework material and the heat pump adsorption working medium can be modulated. The driving temperature of the adsorption type heat pump distillation system is reduced. Lower quality heat energy is utilized. The circulation volume of the heat pump working medium is raised. Heat transfer of the adsorption bed is reinforced. The regenerative heat load during the distillation process is increased. The efficiency of the adsorption type heat pump distillation system is improved.

Description

technical field [0001] The invention relates to a metal organic framework and an adsorption heat pump rectification system. Background technique [0002] The rectification process is the separation and purification of chemical products in exchange for the consumption of heat energy, which has low thermodynamic efficiency and high energy consumption. Reasonable and effective use of the heat of condensation of the overhead steam of ordinary rectification towers is a fundamental solution to the key technical problem of high energy consumption in the rectification process. Adsorption heat pump rectification is a kind of use of adsorption heat pump technology to recover the latent heat of condensation of low-temperature steam at the top of the tower and use it as the heat source of the reboiler at the bottom of the tower to transfer the heat from the low temperature at the top of the rectification tower to the high temperature of the bottom of the tower during the rectification o...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the existing adsorption heat pump rectification system, such as small circulating volume of adsorption heat pump working medium, low rectification heat recovery, and difficult to use in rectification working conditions with low operating temperature, and adopt metal organic framework porous material as adsorption In-situ synthetic adsorbent coating on the wall carrier of the heat pump adsorption bed heat exchanger provides a new type of high-efficiency adsorption working medium pair, which improves the adsorption and desorption capacity of the heat pump working medium, especially the adsorption capacity under low adsorption pressure. , so that the adsorption heat pump is suitable for the vacuum distillation process between relatively low volatility or heat-sensitive mixtures, strengthens the heat transfer of the adsorption bed, broadens the application range of the adsorption heat pump rectification process, and improves the system efficiency

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