Bimetal organic framework material as well as preparation and application thereof

Abstract

The invention relates to a bimetal organic framework material adsorbent applied to methane / nitrogen separation and a preparation method thereof. The bimetal organic framework material adsorbent is a compound with super-molecular porous network structure, wherein the compound is formed by coordinating two metal ions with an organic ligand HCOOH under the action of an adjusting agent; at least one of the two metal ions is Ni(II); the coordination conditions of different metals are controlled by adjusting complexation of Ni(II) to obtain several bimetal organic framework materials with different metal ratios. The prepared adsorbent has rich micro-porous structures; the purpose of adjusting pore properties microscopically is achieved; the NH4 / N2 separation effect is excellent; the material is simple to prepare and low in cost, and is extremely applicable to development and recycling of low-quality methane separated under low pressure.

Description

technical field

[0001] The invention belongs to the technical field of chemical adsorbents, in particular to a bimetallic adsorbent for methane-nitrogen adsorption separation and a preparation method thereof. Background technique

[0002] Energy shortage and environmental pollution are two major issues facing our country at present. Methane (CH 4 ) is an internationally recognized low-carbon clean energy. Its development and clean utilization have become one of the major strategies to solve the contradiction between energy supply and demand in my country, realize energy diversification, and maintain sustainable development of the economic environment. According to my country's energy plan, by 2020 the proportion of natural gas in primary energy consumption is planned to increase to 12%, which is equivalent to an annual consumption of 400 billion cubic meters, and the natural gas resource gap will reach 150 billion cubic meters, and the contradiction between supply and deman...