Sulfur-resistant catalyst, and preparation method and application thereof
A catalyst and powder technology, which is applied in the field of anti-sulfur catalyst and its preparation, can solve the problems of restricting the wide application of catalytic combustion technology, poisoning and deactivation, etc., and achieve simple and easy-to-operate preparation process and equipment, prevent the reduction of active components, and reduce the cost effect
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[0028] The invention provides a preparation method of an anti-sulfur catalyst, comprising the following steps:
[0029] S1, weigh SiO 2 and Al 2 o 3 Add the powder into deionized water and stir; then add TiO 2 The powder and the metal compound are stirred evenly to obtain a mixed solution. Simultaneously add SiO 2 and Al 2 o 3 The powder can enhance the force between the coating and the surface of the carrier, effectively prevent the coating from falling off and the reduction of active components, and has a lower cost. Add TiO 2 , can improve the conversion rate and high temperature stability of the catalyst.
[0030] S2, adding a noble metal active component to the mixed solution, ultrasonically stirring, and mixing uniformly to obtain a coating slurry;
[0031] S3, completely immersing the ceramic carrier in the slurry, blowing away excess slurry in the pores by air flow, drying for 10-50 minutes, and finally calcining at 350-1000° C. to obtain a sulfur-resistant ca...
Embodiment 1
[0042] The preparation method of the present embodiment comprises the following steps:
[0043] A. Weigh 15% SiO by mass fraction 2 , 10% Al 2 o 3 , 30%TiO 2 , 3% Co-Mn, 2% Ce-Zr, 0.04% Pt powder;
[0044] B. SiO 2 and Al 2 o 3 Add the powder into deionized water and stir;
[0045] C. Then add TiO 2 , Co-Mn and Ce-Zr powders were stirred, and then 2 mL of polyvinyl alcohol was added for stirring; the pH was adjusted to be 8;
[0046] D. Finally, add Pt to the above solution, ultrasonically stir for 100 min in an ultrasonic device, and mix well to obtain a coating slurry;
[0047] E. Completely immerse the honeycomb ceramic carrier of 100mm×100mm×50mm in the slurry prepared above, blow off the excess slurry in the pores through the air flow, dry in the microwave for 40min, and finally calcined at 600°C in the air atmosphere to obtain Anti-sulfur catalyst.
[0048] Prepared catalyst in 50ppmSO 2 Sulfide treatment under atmosphere for 240h to obtain a sulfided catalys...
Embodiment 2
[0050] The preparation method of the present embodiment comprises the following steps:
[0051] A. Weigh 10% SiO by mass fraction 2 , 15%Al 2 o 3 , 30%TiO 2 , 3% Co-Mn, 2% Ce-Zr, 0.04% Pt powder;
[0052] B. SiO 2 and Al 2 o 3 Add the powder into deionized water and stir;
[0053] C. Then add TiO 2 , Co-Mn and Ce-Zr powders were stirred, and then 2 mL of polyvinyl alcohol was added for stirring; the pH was adjusted to 9;
[0054] D. Finally, add Pt to the above solution, ultrasonically stir for 120min in an ultrasonic device, and mix well to obtain a coating slurry;
[0055] E. Completely immerse the honeycomb ceramic carrier of 100mm×100mm×50mm in the slurry prepared above, blow off the excess slurry in the pores through the air flow, dry in the microwave for 30min, and finally calcinate at 800°C in the air atmosphere to obtain Anti-sulfur catalyst.
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