A Fe-ce-based composite catalyst suitable for hydrogen sulfide catalytic reduction desulfurization and denitrification process and its preparation method
A composite catalyst, desulfurization and denitrification technology, applied in the field of Fe-Ce-based composite catalyst and its preparation, can solve the problems of low conversion rate at low temperature, high energy consumption in high temperature section, and inability to remove, etc., and achieve high installation and maintenance costs Effect
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[0030] The preparation method of a Fe-Ce-based composite catalyst suitable for hydrogen sulfide catalytic reduction desulfurization and denitrification process comprises the following steps:
[0031] 1) Prepare composite carrier Al first 2 o 3 -TiO 2 ;
[0032] 2) Post-preparation of the composite catalyst Fe 2 o 3 -CeO 2 / Al 2 o 3 -TiO 2 .
[0033] Preferably, in step 1), the Al 2 o 3 -TiO 2 It is prepared by sol-gel method with aluminum salt and titanate.
[0034]Preferably, in step 1), the aluminum salt is aluminum nitrate; the titanate is tetrabutyl titanate; the molar ratio of aluminum nitrate to tetrabutyl titanate is 2:1; further , the aluminum nitrate is Al(NO 3 ) 3 9H 2 O; The tetrabutyl titanate is Ti(OC 4 h 9 ) 4 .
[0035] Preferably, in step 2), the composite catalyst Fe 2 o 3 -CeO 2 / Al 2 o 3 -TiO 2 After mixing the iron salt and cerium salt, and then with the composite carrier Al 2 o 3 -TiO 2 Prepared by isometric impregnation.
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[0040] a-Composite carrier AT(Al 2 o 3 -TiO 2 ) preparation method:
[0041] (1) In a 250ml beaker, add 2.4molC in sequence 2 h 5 OH, 0.9molCH 3 COOH, and 1.8 mol of deionized water, and then uniformly stirred for 1 min until completely mixed uniformly to prepare a mixed solvent.
[0042] (2) Weigh 0.2mol of Al(NO 3 ) 3 9H 2 O, then pour it into the mixed solvent prepared above, and stir until it is completely dissolved.
[0043] (3) 0.1mol of Ti(OC 4 h 9 ) 4 Slowly add the above-mentioned dissolved Al(NO 3 ) 3 9H 2 in a mixed solution of O. After the addition is complete, it is stirred and allowed to stand until a single homogeneous mixed solution is formed.
[0044] (4) Put the above-mentioned solution into a magnetic stirrer and heat and stir until the solution is completely solidified into a white jelly.
[0045] (5) Aging the resulting white jelly for 12 hours, and then putting it into an oven at 110° C. for drying until white particles are formed.
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