Method for increasing amine compound loading amount in nanoporous carbon and keeping nanopores

Abstract

The invention relates to a method for increasing the amine compound loading amount in nanoporous carbon and keeping nanopores. The method includes the steps of: using nanoparticles as the template, subjecting the nanoparticles to ball-milling and dispersing them in a solution with a dissolved carbon precursor, with the nanoparticles and the carbon precursor being in a mass ratio of 0.1-10:1, and controlling the solvent dosage to make a pasty mixture; after removing the solvent, conducting charring for 0.1-3h at 500-1200DEG C, and conducting NaOH washing and drying to obtain large pore volume nanoporous carbon; then dispersing the nanoporous carbon in alcohol, adding an amine compound, and performing stirring under a temperature ranging from room temperature to 100DEG C until complete volatilization of the solvent, thus obtaining amine compound-loaded nanoporous carbon, with the amine compound and the nanoporous carbon being in a mass ratio of 0.1-2:1. The nanoporous carbon prepared by the invention can still maintain the porous characteristic under the circumstance of a large amount of a loaded amine compound, thus effectively increasing the ability of nanoporous carbon in trapping and absorbing carbon dioxide.

Description

technical field [0001] The invention relates to a method for increasing loading of amine compounds in nanoporous carbon and maintaining nanopores, combining physical adsorption of nanoporous carbon and chemical adsorption of amines to improve the carbon dioxide capture and absorption capacity of the material. Background technique [0002] The problem of global warming under the impact of frequent extreme natural disasters has attracted widespread attention from all over the world. The energy saving and emission reduction of carbon dioxide has become a common research and discussion topic in the scientific community of various countries, especially the research and development of carbon dioxide capture technology. The use of nanoporous carbon to support amine compounds can not only overcome the disadvantages of serious environmental pollution, high energy consumption, and serious equipment corrosion caused by liquid ammonia in the traditional absorption method, but also combi...

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Problems solved by technology

[0003] The invention discloses a method for increasing the loading of amine compounds in nanoporous carbon and maintaining nanopores, which can effectively overcome the problems caused by the small pore diameter and small pore volume of nanoporous materials prepared in the prior art and the excessive loading of amine compounds. Amines severely block the pores of porous carbons, resulting in a serious reduction in available chemical adsorption sites