Preparation method of molecular sieve composite catalyst Fe2O3/ZrO2/SO42 for desorbing CO2-rich amine solution

Abstract

The invention discloses a preparation method of a molecular sieve composite catalyst Fe2O3 / ZrO2 / SO42 for desorbing a CO2-rich amine solution. The composite catalyst is obtained by loading Fe2O3 modified ultrastrong solid acid catalyst ZrO2 / SO42- onto a carrier molecular sieve. The preparation method comprises the following steps: dissolving soluble iron salt and zirconium sulfate into a methanol solution to obtain a mixed solution A; heating the mixed solution A for one hour at the condition of 50 DEG C to obtain a mixed solution B; cooling the mixed solution B to the room temperature, addingmolecular sieve powder, and stirring for 5 hours to obtain a mixed solution C; ultrasonically treating the mixed solution C for more than 0.5 hour to obtain a mixed solution D; and drying and calcining the mixed solution D to obtain the molecular sieve composite catalyst Fe2O3 / ZrO2 / SO42. Compared with the prior art, the catalyst of the invention is simple in preparation process, cheap and easy inobtaining raw materials; the catalytic desorption performance is better than that of the traditional molecular sieve catalyst, a single metal oxide and a single metal oxide physically mixed catalyst;the catalyst is easy to separate, good in stability and recyclable; and the absorption performance for carbon dioxide of the amine solution is not influenced.

Description

technical field [0001] The present invention relates to a kind of Fe that is used for rich CO2 amine solution desorption 2 o 3 / ZrO 2 / SO 4 2- -A method for preparing a molecular sieve composite catalyst, in particular to a catalyst for desorbing CO2 from an organic amine solvent. Background technique [0002] Due to the extensive use of fossil energy in modern industry, a large amount of carbon dioxide (CO2) is emitted, which leads to many environmental problems, such as the greenhouse effect and sea level rise. At this stage, post-combustion capture of CO2 using organic amine solution is the most economical and technologically mature CO2 capture method. However, this technology has the problem of high energy consumption for the regeneration of CO2-rich amine solution. When using the traditional thermal regeneration method to regenerate the carbon-rich amine solution, the energy consumption accounts for about two-thirds of the cost of the entire CO2 capture process. T...

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Problems solved by technology

However, the existing catalysts are not enough to reduce the regeneration energy consumption to a more ideal level, in order to further reduce the rich CO 2 Amine solution regeneration energy consumption, thereby reducing CO 2 Capture cost, improve CO capture by amine method 2 practicality

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