Transition metal-doped base bifunctional co2 adsorbents, methods of making, and uses thereof
By doping Na2ZrO3 with transition metals to form a CO2 adsorbent with a complex microstructure, the problems of insufficient cyclic stability and adsorption capacity of Na-based adsorbents under high temperature conditions were solved, achieving efficient CO2 capture and cost reduction.
CN119869435BActive Publication Date: 2025-10-17CHINA PETROLEUM & CHEMICAL CORP +2
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Patent Information
- Application Number
- CN202411901230.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2044-12-23
AI Technical Summary
Technical Problem
Existing Na-based CO2 adsorbents have insufficient cyclic stability and adsorption capacity under high temperature conditions, resulting in low CO2 capture efficiency and high cost, making them unsuitable for large-scale applications.
Method used
Transition metals such as Ni, Co, Fe, Mn, Cu, and Zn are doped into Na2ZrO3 by the co-precipitation method, and a complex microstructure is formed through segmented calcination, which increases the exposed area of active sites and lattice defects, thereby improving CO2 adsorption performance and cycle stability.
Benefits of technology
It significantly improves the CO2 adsorption capacity and cycle stability, reduces the preparation cost, and is suitable for large-scale application in flue gas CO2 capture and conversion.
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Abstract
The application discloses a transition metal doped alkali base bifunctional CO2 adsorbent, a preparation method and application thereof, and comprises an alkali base bifunctional material and a transition metal. The preparation comprises the following steps: weighing transition metal, Ni, Na and Zr sources, dissolving the transition metal, Ni, Na and Zr sources in deionized water, stirring to form a uniform solution, weighing a precipitant, dissolving the precipitant in deionized water, adding the mixed system into the precipitant after complete dissolution, stirring and precipitating the mixed system in a constant-temperature water bath, drying the precipitate, calcining the obtained solid powder, and grinding the calcined solid powder into powder to obtain the transition metal doped alkali base bifunctional CO2 adsorbent. The preparation method of the transition metal doped alkali base bifunctional CO2 adsorbent material is simple, the transition metal is doped into Ni-Na2ZrO3 by using a coprecipitation method, the formation of in-situ pores and channels is promoted, the exposure area of active sites of the adsorbent is increased, the formation of lattice defects in the crystal cell is promoted, the surface energy of the crystal face of the material is changed from the dimension of solid physics, and the CO2 adsorption capacity and cycle stability are improved.
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