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Ordered mesoporous TMCO-aluminium oxide (transition metal composite oxide-aluminium oxide) catalyst resistant to sulfur poisoning and preparation method thereof

A catalyst and alumina technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low utilization rate of catalyst active components and dispersion of active components Poor performance, poor thermal stability and other problems, to achieve good catalytic oxidation reaction performance, weaken the poisonous effect, reduce the effect of ignition temperature

Active Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of active components of the catalyst prepared by this method is low and the cost is high. At the same time, the solid solution of cerium, manganese and titanium is easy to sinter at high temperature. The specific surface area is reported in the patent from 267m 2 / g down to 20m at 700°C 2 / g, poor thermal stability
CN105289602A discloses a preparation method of a cerium-zirconium composite oxide-loaded perovskite catalyst with sulfur resistance, except that the perovskite La 1-x Sr x MnO 3 (x=0-0.5) As an active component, 0.01-1wt.% noble metal (one or more of Pt, Pd, Rh and Ru) is also introduced as an additive, and the noble metal additive is easily poisoned by sulfide , thereby reducing the reactivity of the catalyst
[0005] Due to the lack of targeted and effective design, the current catalytic oxidation catalysts in the prior art also have disadvantages such as poor dispersion of active components, high cost, and noble metals are easily poisoned by sulfides.

Method used

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  • Ordered mesoporous TMCO-aluminium oxide (transition metal composite oxide-aluminium oxide) catalyst resistant to sulfur poisoning and preparation method thereof
  • Ordered mesoporous TMCO-aluminium oxide (transition metal composite oxide-aluminium oxide) catalyst resistant to sulfur poisoning and preparation method thereof
  • Ordered mesoporous TMCO-aluminium oxide (transition metal composite oxide-aluminium oxide) catalyst resistant to sulfur poisoning and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, a binary transition metal composite oxide-alumina catalyst whose active component is MnCe is prepared, and the specific preparation method is as follows:

[0039] First, dissolve 21g of template agent P123 in a beaker filled with 400mL of methanol, then add 32mL of concentrated nitric acid and 41g of aluminum isopropoxide, and continuously stir vigorously for 30 minutes;

[0040] Secondly, 1.9g cerium chloride (CeCl 3 ·7H 2 O) and 2.0g manganese chloride (MnCl 2 4H 2 O) sequentially add in the above-mentioned solution and constantly stir;

[0041] Subsequently, cover the mouth of the beaker with a PET plastic film and tie it up tightly, and stir continuously for 10 hours;

[0042] Remove the PET plastic film, place the beaker in a vacuum oven, and dry at 65°C for 16 hours;

[0043] Finally, the plastic solid in the beaker was taken out, placed in a muffle furnace, and the temperature was raised to 450°C at a rate of 1.5°C / min and maintained for 3 h...

Embodiment 2

[0048] In this example, a ternary transition metal composite oxide-alumina catalyst whose active component is V-Fe-La is prepared, and the specific preparation method is as follows:

[0049] Dissolve 32g of template agent P123 in a beaker filled with 400mL of absolute ethanol, then add 16mL of concentrated hydrochloric acid and 49g of aluminum isopropoxide, and continuously stir vigorously for 30 minutes;

[0050] Secondly, 2.8g ammonium metabirate (NH 4 VO 3 ), 4.8g ferric chloride (FeCl 3 ·6H 2 O) and 5.2g lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) sequentially add in the above-mentioned solution and constantly stir;

[0051] Subsequently, cover the mouth of the beaker with a PET plastic film and tie it up tightly, and stir continuously for 12 hours;

[0052] Remove the PET plastic film, place the beaker in a vacuum oven, and dry at 70°C for 14 hours;

[0053] Finally, the plastic solid in the beaker was taken out, placed in a muffle furnace, and the temperature was rai...

Embodiment 3

[0059] In this example, a binary transition metal composite oxide-alumina catalyst whose active component is Co-La is prepared, and the specific preparation method is as follows:

[0060] First, dissolve 16g of template agent P123 in a beaker filled with 400mL of absolute ethanol, then add 25mL of phosphoric acid and 27g of aluminum isopropoxide, and continuously stir vigorously for 30 minutes;

[0061] Secondly, 3.9g cobalt nitrate (Co(NO 3 ) 3 ·6H 2 O) and 0.5g lanthanum chloride (LaCl 3 ·7H 2 O) sequentially add in the above-mentioned solution and constantly stir;

[0062] Subsequently, cover the mouth of the beaker with a PET plastic film and tie it up tightly, and stir continuously for 9 hours;

[0063] Remove the PET plastic film, place the beaker in a vacuum oven, and dry at 70°C for 13 hours;

[0064] Finally, the plastic solid in the beaker was taken out, placed in a muffle furnace, and the temperature was raised to 450 °C at a rate of 1 °C / min and maintained fo...

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Abstract

The invention discloses an ordered mesoporous TMCO-aluminium oxide (transition metal composite oxide-aluminium oxide) catalyst resistant to sulfur poisoning and a preparation method thereof, and belongs to the technical field of environmental protection. The catalyst is prepared by taking transition metal composite oxide as a catalyst active component, aluminum isopropoxide as an aluminum source and a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer as a template agent as the raw materials. The preparation method comprises the following steps that firstly, the template agent, the aluminum isopropoxide and acid are sequentially added into a container containing a solvent, and stirring is carried out until the mixture is dissolved; the active component of the catalyst is added into the container, and stirring is carried out; then the container is sealed, and stirring is carried out at room temperature; then after the container is opened, drying is carried outin a drying oven; and finally solid dried in the drying oven is taken out and then is roasted to obtain the catalyst. The ordered mesoporous TMCO-alumina catalyst is prepared by adopting a solvent volatilization-solute self-assembly method, and the prepared catalyst has high reaction activity and relatively strong anti-sulfur-poisoning performance.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to an ordered mesoporous TMCO-alumina catalyst resistant to sulfur poisoning and a preparation method thereof. Background technique [0002] Volatile organic compounds (volatile organic compounds, referred to as VOCs) emitted during the petrochemical process account for about 30% of the total. At the same time, the petrochemical industry is characterized by large-scale, integrated, and continuous operations. The promotion and application of VOCs centralized recovery or destruction Technology has a higher technical economy. In order to better control VOCs emissions, the Ministry of Environmental Protection of my country promulgated and implemented national standards for the petrochemical industry in 2015, GB 31570-2015 "Petroleum Refining Industry Pollutant Discharge Standards" and GB 31571-2015 "Petrochemical Industry Pollutant Discharge Standards" "Standard", which requires ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J23/34B01J23/83F23G7/07
CPCF23G7/07B01J23/002B01J23/22B01J23/34B01J23/83B01J2523/00B01J35/647B01J35/615B01J2523/3712B01J2523/72B01J2523/31B01J2523/3706B01J2523/55B01J2523/842B01J2523/845B01J2523/67
Inventor 刘欢赵宇鑫单晓雯程龙军尹树孟刘全桢
Owner CHINA PETROLEUM & CHEM CORP
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