A kind of high-performance porous calcium-based absorbent and its preparation method

Abstract

The invention belongs to the technical fields of environmental pollution control and clean coal combustion, and concretely relates to a high-performance porous calcium-based absorbent. The high-performance porous calcium-based absorbent comprises calcium source powder and biomass powder, and the biomass powder is pyrolyzed and volatilies when the calcium-based absorbent is calcined at a high temperature in order to form a porous structure in the biomass powder. The invention also discloses a preparation method of the calcium-based absorbent. Pores formed by the pyrolysis and volatilization of the cellulose-rich biomass powder are used to improve the adsorption capacity and the cycle stability of the calcium-based absorbent, so the prepared spherical calcium-based absorbent is suitable for capturing CO2 in a fluidized bed system; the characteristic of low cost of biomass is fully used in the whole preparation process, and the preparation method also has the advantages of high efficiency, high quality, low cost and convenience in control, so the method is especially suitable for being used in large-scale batch production.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution prevention and clean coal combustion, and more specifically relates to a high-performance porous calcium-based absorbent and a preparation method thereof. Background technique [0002] Under the situation that global warming has become an established fact, CO 2 The reduction of greenhouse gas emissions has become the consensus of the international community to deal with climate change, and my country is also facing a huge CO2 2 pressure to reduce emissions. CO 2 capture and storage (CO 2 Capture and Storage (CCS) technology is considered to be one of the most promising emission reduction technologies. This technology is based on the capture of CO from large fixed carbon emission sources such as coal-fired power stations and cement plants. 2 , and then for this high concentration of CO 2 compressed transport and storage, so that CO 2 A technology in which emissions are contr...

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Problems solved by technology

[0008] In view of the above technical problems, it has not been seen that biomass is used to prepare modified calcium-based absorbents for cyclic capture of CO 2 How to solve the above-mentioned technical difficulties, design a high-performance porous calcium-based absorbent and its preparation method, and realize the preparation of high-performance and low-cost adsorbents in batches is the problem to be solved in the present invention

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