Grading porous compound carbon fiber low-temperature sulfur dioxide adsorptive catalyst and preparation method thereof
A composite carbon fiber and sulfur dioxide technology, 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 and achieve recycling performance good effect, improving desulfurization activity and excellent catalytic performance
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Embodiment 1
[0047] In this embodiment, the steps of preparing a low-temperature sulfur dioxide adsorption catalyst for hierarchical porous Ti-Co / C composite carbon fibers are as follows:
[0048] (1) Preparation of myricetium polyphenol-grafted waste dander
[0049] Take 5.0g of waste dander (CF) and put it in a 250mL three-neck bottle, add 100mL of deionized water, soak for 4 hours to fully infiltrate the waste dander, then add 3.0g of myricetin polyphenol (BT), and stir the reaction at room temperature For 2 h, the reaction product was separated by filtration, and 50 mL of glutaraldehyde aqueous solution with a concentration of 2.0 wt% was added, and 0.1 mol / L H 2 SO 4 The pH value of the solution was adjusted to between 6.0 and 6.5, and the reaction was stirred at 30 °C for 6 h. The reaction product was separated by filtration, washed with deionized water, and vacuum-dried at 35 °C overnight to obtain myricetus polyphenol-grafted waste skin flakes (CF- BT).
[0050] (2) Load Ti 4+ ...
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) is 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 sk...
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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