Hierarchical porous composite carbon fiber low-temperature sulfur dioxide adsorption catalyst and preparation method thereof
A technology of composite carbon fiber and sulfur dioxide, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of uneven distribution of active components
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Embodiment 1
[0047] In this example, the preparation of hierarchical porous Ti-Co / C composite carbon fiber low-temperature sulfur dioxide adsorption catalyst, the steps are as follows:
[0048] (1) Preparation of waste dander of bayberry polyphenol grafting
[0049] Take 5.0g of waste dander (CF) and place it in a 250mL three-necked bottle, add 100mL of deionized water, soak for 4 hours to fully infiltrate the waste dander with deionized water, then add 3.0g of bayberry polyphenols (BT), and stir the reaction at room temperature 2h, filter and separate the reaction product and add 50mL concentration of 2.0wt% glutaraldehyde aqueous solution, with 0.1mol / L H 2 SO 4 Adjust the pH value of the solution to between 6.0 and 6.5, stir and react at 30°C for 6h, filter and separate the reaction product and wash it with deionized water, and dry it under vacuum at 35°C overnight to obtain waste dander grafted with bayberry polyphenols (CF- BT).
[0050] (2) load Ti 4+ and Co 2+ Preparation of pr...
Embodiment 2
[0063] Example 2: Characterization of the catalyst
[0064] 1. Scanning electron microscopy and energy dispersive X-ray spectroscopy analysis
[0065] CF, CF-BT-C, Co in embodiment 1 and comparative example 1,3 3 / C and Ti 2 -Co 1 / C for scanning electron microscope test, the results are as follows figure 2 shown. figure 2 (a)(b) are the SEM images of CF and CF-BT-C, respectively, from figure 2 (b) It can be seen that the product after carbonization of CF-BT is in the form of a block without fiber morphology. figure 2 (c) for Co 3 / C scanning electron microscope, its morphology does not retain the structural characteristics of waste dander, and the carbonized product is in the form of flakes. This may be due to the steric hindrance effect of bayberry polyphenols, which makes the cobalt particles relatively dispersed, and the nanoparticles cannot be bonded and assembled adjacent to each other. When the waste dander template is removed at high temperature, the fiber s...
Embodiment 3
[0081] Example 3: Evaluation of the flue gas desulfurization performance of the catalyst
[0082] 1. Desulfurization device and method
[0083] Figure 7 It is a schematic diagram of a simulated flue gas desulfurization device, which is used to evaluate the flue gas desulfurization performance of sulfur dioxide adsorption catalysts. The flue gas desulfurization performance of Ti-Co / C is carried out in a fixed-bed desulfurization reactor with an inner diameter of 10mm and a sieve plate in the middle to support the catalyst bed. First, a layer of glass wool is filled on the top of the sieve plate. A good amount of catalyst is loaded into the reactor, and then continue to fill a layer of glass wool on it, so that the reaction gas can be fully preheated. The reaction gas is mixed uniformly by the mixer and then enters the fixed-bed desulfurization reactor. The catalyst packing height is 100 mm, and the packing amount is 1.0 g. The simulated flue gas ratio is (V / V): SO 2 , 200...
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