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La2O3-ZrO2 loaded catalyst used for coke oven gas dry reforming and preparation method thereof

A supported catalyst and coke oven gas technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems that do not involve catalyst stability, and achieve Excellent anti-carbon performance, high reactivity, high selectivity effect

Inactive Publication Date: 2014-03-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent (publication number CN101352687) discloses a Ni / La that can be used for carbon dioxide reforming of methane 2 o 3 -γ-Al 2 o 3 Catalyst series, this type of catalyst has better methane conversion rate and carbon monoxide selectivity, but the patent does not involve the stability of this type of catalyst

Method used

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  • La2O3-ZrO2 loaded catalyst used for coke oven gas dry reforming and preparation method thereof
  • La2O3-ZrO2 loaded catalyst used for coke oven gas dry reforming and preparation method thereof
  • La2O3-ZrO2 loaded catalyst used for coke oven gas dry reforming and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 5.338 mmol La(NO 3 ) 3 ·6H 2O, 81.153mmol Zr(NO 3 ) 4 ·5H 2 O and 1.022 mol urea were dissolved in a container filled with a certain amount of deionized water, and 30 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123, Ma=5800) was taken Dissolve in another container with a certain amount of deionized water. After P123 is dissolved, mix the samples in the two containers evenly and heat to 95-100 o C, with vigorous stirring for 48 hours. The resulting precipitate was suction-filtered, washed 3 times with deionized water, and then o C dried overnight, and then dried samples at 500 o C roast for 5 hours, and finally grind the obtained solid into powder, and take the powder within the range of 100-200 mesh as the carrier.

[0025] Take 8.519 mmol Ni(NO 3 ) 2 ·6H 2 O make a solution with deionized water, add 5 g of the above-mentioned prepared carrier to it, stir well, and immerse at room temperature for 24 hours, at 100 ± 10 ...

Embodiment 2

[0027] First, the powder carrier was prepared in exactly the same manner as in Example 1 above.

[0028] Take 6.788 mmol Co(NO 3 ) 2 ·6H 2 O make a solution with deionized water, add 5 g of the above-mentioned prepared carrier to it, stir well, and immerse at room temperature for 24 hours, at 100 ± 10 o C stirring continuously until dry, and at 110 o C dried for 5 hours, then at 800 o C roast for 3 hours, crush the obtained solid into powder, use a mold with a diameter of 1.5 cm, shape it under a pressure of 15 kN (keep the pressure for 1 minute), crush it, sieve it, and take the range of 20 to 40 mesh as Catalyst, the catalyst is recorded as Co / La 2 o 3 -ZrO 2 .

Embodiment 3

[0030] First, the powder carrier was prepared in exactly the same manner as in Example 1 above.

[0031] Take 4.259 mmol Ni(NO 3 ) 2 ·6H 2 O, 0.469 mmol PdCl 2 Make a solution with deionized water, add 5 g of the above-mentioned prepared carrier to it, stir thoroughly, and immerse at room temperature for 24 hours, at 100 ± 10 o C stirring continuously until dry, and at 110 o C dried for 5 hours, then at 800 o C roasting for 2 hours, crush the obtained solid into powder, use a mold with a diameter of 1.5 cm, shape it under a pressure of 15 kN (keep the pressure for 1 minute), crush it, sieve it, and take the range of 20 to 40 mesh as Catalyst, this catalyst is recorded as Ni-Pd / La 2 o 3 -ZrO 2 .

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Abstract

Belonging to the technical fields of metallurgical resource utilization and catalyst making, the invention relates to a preparation method of a catalyst for coke oven gas dry reforming to prepare synthesis gas. The method is characterized by: preparing a high surface area La2O3-ZrO2 composite oxide with a mesoporous structure by a coprecipitation-template agent process, taking the composite oxide as a carrier, and adopting one or two of Ni, Co, Ru, Pt and Pd as active metals. The La2O3-ZrO2 composite oxide carrier is prepared by: dissolving and mixing a zirconium salt, a lanthanum salt and urea in certain proportion, and adding a certain amount of a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the mixture, stirring them for 40-50 hours at 95-100DEG C, then subjecting the obtained sediment to pump filtration, washing, roasting and grinding, thus finally obtaining the La2O3-ZrO2 composite oxide carrier. The catalyst prepared by the method provided by the invention can effectively reduce the carbon deposition tendency in a coke oven gas dry reforming reaction process, and has the advantages of good active metal dispersion, strong catalytic activity, good product selectivity and long service life.

Description

technical field [0001] The invention relates to a La 2 o 3 -ZrO 2 A supported catalyst and a preparation method thereof belong to the technical fields of comprehensive utilization of metallurgical resources and catalyst manufacture. Background technique [0002] Environmental issues such as global warming, sharp decline in biodiversity, frequent occurrence of smog weather and long-term excessive human emissions of CO 2 There is a close causal relationship between pollutants and pollutants. The iron and steel complex has a complete production system from sintering, coking, ironmaking, steelmaking, and energy public and auxiliary facilities, and is a major player in resource consumption and pollutant emissions. Taking coking as an example, my country's coke output in 2012 was about 440 million tons, ranking first in the world. The net gas of 1 ton of coke (the main components are: 55~59 vol% H 2 , 27~30vol%CH 4 , 5~7 vol% CO, 2~3 vol% CO 2 ) occurs at approximately 42...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/83C01B3/40
CPCY02P20/52
Inventor 程红伟鲁雄刚陶伟朱秋桦江波
Owner SHANGHAI UNIV
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