Highly-activity sodium-based solid carbon dioxide absorbent

Abstract

The invention provides a highly-activity sodium-based solid carbon dioxide absorbent which comprises an active ingredient, a carrier and a catalyst, wherein the active ingredient adopts sodium carbonate and accounts for 20%-40% of the total mass of the solid absorbent; the carrier adopts activated aluminum oxide and accounts for 50%-79% of the total mass of the solid absorbent; and the catalyst adopts one or two of TiO2 and TiO(OH)2 and accounts for 1%-10% of the total mass of the solid absorbent. A preparation method of the absorbent adopts an impregnation method, a precipitation method, an impregnation precipitation or an impregnation spraying method. The solid absorbent belongs to low-temperature absorbents, the CO2 absorbent temperature is 60-80 DEG C, and the CO2 desorption temperature is 120-300 DEG C. Materials of the solid absorbent are cheap and accessible, the preparation process cost is low, the procedure is simple, the absorbent is uneasy to become inactive after multiple times of circulation, a higher CO2 removal rate can be maintained, and the absorbent is an optimization scheme with lower investment and energy consumption for the CO2 emission reduction technology and has a wide application prospect.

Description

technical field [0001] The present invention relates to CO in flue gas produced by fossil fuel combustion 2 The method for removing and concentrating uses a wide range of sources of solid absorbent raw materials and is cheap, the preparation method is simple and easy to implement, the absorption speed is fast, and the conversion rate is high. The invention belongs to the technical field of carbon dioxide emission reduction. Background technique [0002] The greenhouse effect and its impact have increasingly become the focus of worldwide attention. Among them, CO 2 The massive emission of greenhouse gases is the main cause of the greenhouse effect and its continuous aggravation. Atmospheric carbon dioxide levels have increased by 25% since the Industrial Revolution, far exceeding the entire historical record that scientists could possibly survey for the past 160,000 years, and there is no sign of slowing down. The Intergovernmental Panel on Climate Change predicts that by...

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Problems solved by technology

[0006] Southeast University is also targeting sodium-based solid CO 2 A lot of research has been done on the absorbent, and it was found that after the sodium carbonate was impregnated and loaded on the activated alumina carrier, the prepared absorbent had a well-developed pore structure, which promoted the active components and CO 2 Sufficient exposure is beneficial to the occurrence and progress of the carbon dioxide absorption reaction, but the CO 2 Insufficient absorption capacity, slow reaction rate