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Noble metal FCC catalyst regeneration flue gas combustion improver and preparation method thereof

A technology for regenerating flue gas and combustion accelerant, which is applied in the direction of gas fuel, fuel, petroleum industry, etc. It can solve the problems of reducing the activity of combustion accelerant and persistent carbon monoxide conversion rate, so as to maintain carbon monoxide conversion activity, high carbon monoxide conversion rate and economical operation cost effect

Inactive Publication Date: 2020-07-14
山东骏飞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: in the prior art, due to the high-temperature water vapor existing in the FCC catalyst regeneration flue gas, the destruction of the carrier skeleton of the carbon monoxide combustion enhancer and the promotion of the agglomeration of the active noble metal particles on the surface of the carrier reduce the overall activity persistence of the combustion enhancer and the conversion rate of carbon monoxide in flue gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Specifically include the following steps:

[0042] The first step is to prepare the pre-combustion aid.

[0043] Mix the aqueous solutions of alumina precursors, silicon oxide precursors, and other inorganic metal oxide precursors in a certain proportion, stir evenly to form a slurry, and then use a spray drying system to make spherical objects with a particle size of 50-60μm. The material was calcined at 550° C. for 3 hours in a muffle furnace, and it was a carrier after being lowered to room temperature, and the obtained carrier was composed of: Al 2 o 3 (74.62wt%), SiO 2 (15.40wt%), CeO 2 (6.08wt%), Fe 2 o 3 (3.93wt%);

[0044] At room temperature, impregnate the above-mentioned carrier with chloroplatinic acid solution, the impregnation time is 2 hours, set the drying temperature in the drying oven to 85°C, and the drying time is 2 hours, transfer it to the muffle furnace, set the temperature to 550°C, and bake After cooling down to room temperature for 3 hou...

Embodiment 2

[0064] Specifically include the following steps:

[0065] The first step is to prepare the pre-combustion aid.

[0066] Mix the aqueous solutions of alumina precursors, silicon oxide precursors, and other inorganic metal oxide precursors in a certain proportion, stir evenly to form a slurry, and then use a spray drying system to make spherical objects with a particle size of 50-60μm. The material was calcined at 550° C. for 3 hours in a muffle furnace, and it was a carrier after being lowered to room temperature, and the obtained carrier was composed of: Al 2 o 3 (80.23wt%), SiO 2 (13.51wt%), CeO 2 (4.47wt%), CuO (1.79wt%);

[0067] At room temperature, impregnate the above-mentioned carrier with chloroplatinic acid solution, the impregnation time is 2 hours, set the drying temperature in the drying oven to 85°C, and the drying time is 2 hours, transfer it to the muffle furnace, set the temperature to 550°C, and bake After cooling down to room temperature for 3 hours, the...

Embodiment 3

[0083] Specifically include the following steps:

[0084] The first step is to prepare the pre-combustion aid.

[0085] Mix the aqueous solutions of alumina precursors, silicon oxide precursors, and other inorganic metal oxide precursors in a certain proportion, stir evenly to form a slurry, and then use a spray drying system to make spherical objects with a particle size of 50-60μm. The material was calcined in a muffle furnace at 550°C for 3 hours, and after cooling down to room temperature, it became a carrier, and the composition of the obtained carrier was Al 2 o 3 (75.28wt%), SiO 2 (16.36wt%), CeO 2 (5.71wt%), CuO (2.64wt%);

[0086] At room temperature, impregnate the carrier with a chloroplatinic acid solution for 2 hours, set the drying temperature in a drying oven to 85°C, and set the drying time to 2 hours, transfer it to a muffle furnace, set the temperature to 550°C, The calcination time is 3 hours, and the pre-combustion promoter is obtained after cooling do...

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Abstract

The invention discloses a noble metal FCC catalyst regeneration flue gas combustion improver and a preparation method thereof, and relates to the technical field of carbon monoxide combustion improvers in a petroleum refining catalytic cracking (FCC) process. The preparation method comprises the following steps: firstly, loading an active component on a carrier to obtain a pre-combustion improver;dipping the pre-combustion improver in a fatty acid absolute ethyl alcohol solution, and introducing fatty acid molecules into skeleton pore channels / gaps of the carrier through dipping; and after drying, performing roasting in a nitrogen atmosphere to cover the active points in the pore channels / gaps of the carrier skeleton. In the fatty acid absolute ethyl alcohol solution, the weight of the fatty acid solute is 0.10-10.00% of the weight of the absolute ethyl alcohol solvent. The noble metal FCC catalyst regeneration flue gas combustion improver prepared by adopting the preparation method disclosed by the invention has high hydrothermal stability, high carbon monoxide conversion rate and high lasting combustion-supporting activity in the regeneration process of the FCC catalyst.

Description

technical field [0001] The invention relates to the field of catalyst regenerated flue gas carbon monoxide combustion accelerant in the process of catalytic cracking (FCC) in petroleum refining, in particular to a precious metal FCC catalyst regenerated flue gas combustion accelerant and a preparation method thereof. Background technique [0002] In the catalytic cracking (FCC) process, the carbon-deposited catalyst is regenerated by burning carbon, which will produce a large amount of carbon monoxide, and part of the carbon monoxide will rise from the dense-phase layer to the dilute-phase layer and "post-combust" with oxygen, releasing a large amount of heat, which will lead to dilute The temperature rise of the phase layer is too high, which will damage the catalyst or even damage the regeneration device; or part of the carbon monoxide will be discharged with the flue gas without conversion, polluting the environment. Adding an appropriate amount of carbon monoxide combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/00
CPCC10L3/003C10L2230/22
Inventor 李士彥李炳辉张庆安毕见东
Owner 山东骏飞环保科技有限公司