Preparation method of SBA-15 molecular sieve-based supported catalyst for desorption of CO2-rich amine solution

Abstract

The invention discloses a preparation method of a SBA-15 molecular sieve-based supported catalyst for desorption of a CO2-rich amine solution. The supported catalyst is obtained by supporting a metaloxide (a transition metal oxide or an amphoteric oxide) acidified by sulfuric acid on SBA-15 molecular sieve by a hydrothermal synthesis method, and the main experimental procedure is as follows: putting molecular sieve SBA-15 and urea into a round bottom flask, adding an appropriate amount of deionized water, and performing ultrasonic treatment for 0.5 h to obtain a solution A; adding a soluble metal salt into the solution A, and performing reflux stirring for 6 h at 90 DEG C to obtain a gel-like solution B; filtering and washing the solution B, mixing obtained solids, and performing drying and calcination to obtain a composite catalyst MOX / SBA-15 (C); and acidifying the composite catalyst MOX / SBA-15, and performing filtering and drying and calcination to finally obtain the SBA-15 molecular sieve-based supported catalyst. Compared with the prior art, the catalyst has stable performance, wide sources of raw materials, and cheap prices; the catalyst is convenient for separation, and hasgood regeneration performance; the catalyst has better catalytic performance than single molecular sieve and an acidified metal oxide; and the catalyst has relatively good catalytic cycle stability,and has no effects on the absorption performance of an amine solution.

Description

technical field [0001] The invention belongs to the technical field of new energy and energy saving, and relates to a 2 The preparation method of SBA-15 molecular sieve-based supported catalyst desorbed by amine solution. Background technique [0002] The continuous combustion of fossil fuels produces a large amount of CO 2 , causing extreme weather such as the greenhouse effect, leading to global melting of glaciers, land desertification, hurricanes and floods and other problems. After burning, CO 2 Capture technology is expected to capture CO in industrial exhaust on a large scale 2 . From the perspective of current technological progress, the organic amine solution absorption method is the most mature and widely used CO 2 separation technology, which for CO 2 The absorption effect is the best, and the product gas CO 2 High purity. However, amine solvents have disadvantages such as degradation, corrosion, and high regeneration energy consumption, which seriously res...

AI Technical Summary

Problems solved by technology

A single metal oxide or molecular sieve can only reduce the desorption energy consumption by about 10%-25%, and some molecular sieves are easy to block during use, and the catalytic performance is not stable

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