A sulfur dioxide gas absorbent

By leveraging the synergistic effect of catalysts and enhancers, the problems of slow reaction kinetics and poor cycle stability in traditional alkanolamine solvents have been solved, achieving efficient sulfur dioxide absorption and stable cycle performance.

CN122273251APending Publication Date: 2026-06-26XIAN WOZER ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202610434642.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing technologies, the reaction kinetics of traditional single alkanolamine solvents with sulfur dioxide are slow, the pH of the system drops sharply during the absorption process, making it difficult to improve the effective absorption capacity and resulting in poor cycle stability.

Method used

A composite sulfur dioxide gas absorbent containing a catalyst and an enhancer is adopted. The catalyst efficiently activates sulfur dioxide molecules through nitrogen-zinc ion-sulfur active centers, while the enhancer provides high specific surface area and acid catalysis function to maintain the optimal acid-base environment for the reaction. The synergistic effect of the catalyst and the enhancer improves the absorption capacity and cycle stability.

Benefits of technology

It significantly improves the absorption rate and capacity of sulfur dioxide, ensuring that the absorbent maintains high cycle stability and regeneration efficiency after multiple absorption and regeneration cycles.

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Abstract

This invention relates to the field of flue gas treatment technology, specifically to a sulfur dioxide gas absorbent, comprising the following raw materials by weight: 90-100 parts of an aqueous amine solution and 2-6 parts of additives. In this invention, the nitrogen-zinc ion-sulfur active center of the catalyst acts as a molecular key, efficiently and reversibly coordinating and activating sulfur dioxide molecules, significantly reducing the reaction energy barrier and fundamentally improving the intrinsic absorption rate. The enhancer, with its high specific surface area, provides a large interface for the reaction. Its surface sulfonic acid groups not only buffer the decrease in system pH, maintaining the optimal acid-base environment for the reaction, but also catalyze the conversion of absorption intermediates into more stable products, thereby shifting the reaction equilibrium to the right. Under the combined effect of these two factors, the catalyst accelerates the reaction towards equilibrium, while the enhancer continuously shifts the equilibrium point, resulting in a higher absorption capacity for the absorbent.
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