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Sulfur-tolerant shift catalyst and preparation method thereof

A sulfur-resistant conversion and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of increasing the preparation process and affecting the active components cobalt and molybdenum Uniform dispersion, unfavorable synergism and other problems, to achieve the effect of simplifying the operation steps, increasing the stability of the activity, and improving the distribution mode

Inactive Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In the kneading preparation process involved in the above-mentioned prior art, it is usually necessary to prepare solutions A and B containing active components cobalt or molybdenum respectively, and then sequentially add them to the carrier material, which requires two dry mixing and kneading steps, which not only increases the preparation process, and affects the uniform dispersion between the active components cobalt and molybdenum, which is not conducive to the synergistic effect of the two

Method used

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  • Sulfur-tolerant shift catalyst and preparation method thereof
  • Sulfur-tolerant shift catalyst and preparation method thereof
  • Sulfur-tolerant shift catalyst and preparation method thereof

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Experimental program
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Embodiment 1～10

[0044] The chemical composition of the prepared catalyst of embodiment 1~10 is listed in table 1:

[0045] Table 1 Catalyst Composition

[0046]

[0047] The preparation method of each catalyst of the present invention is as follows:

[0048] Catalyst C-1:

[0049] Weigh 11.31g of cobalt oxalate, 10.46g of ammonium molybdate, and 22.50g of ammonium oxalate, add 40ml of deionized water, stir mechanically and heat to 70°C to prepare solution A containing both cobalt and molybdenum active components in one step.

[0050] Mix 22.10g of light magnesia, 57.14g of pseudoboehmite, 18.75g of metatitanic acid and 22.56g of aluminum glue as a powdery solid compound, add solution A, knead evenly; extrude into strips.

[0051] Leave at room temperature to dry naturally. By means of gradient heating, the temperature was raised from 20°C to 120°C over 1 hour, kept at 120°C for 2 hours, then raised to 550°C over 1 hour, and the catalyst was calcined at 550°C for 5 hours to obtain catalyst...

Embodiment 11

[0089] Catalyst Performance Evaluation:

[0090] Catalyst activity evaluation is carried out on a pressurized original particle size evaluation device, such as figure 1 Shown is a conventional device. It is used to simulate industrial conditions, measure the CO concentration and its change of the original particle size catalyst under different conditions, and evaluate various performances such as catalyst activity and stability. A synthetic ammonia workshop is used to convert the previous process gas into the raw material gas, and add an appropriate amount of H 2 S gas, according to the requirements of different water-gas ratios, makes the high-temperature vaporized water vapor react with the raw material gas in the reaction tube, and the tail gas after the reaction is analyzed by chromatography.

[0091] The pressure evaluation conditions are:

[0092] Catalyst loading: 100mL (Φ4mmα-Al 2 o 3 Balls 1:1 diluted filling)

[0093] Catalyst particle size: Φ4mm×4mm

[0094] ...

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Abstract

The invention belongs to the technical field of sulfur-tolerant shifting in coal chemical industry, and concretely relates to a sulfur-tolerant shift catalyst and a preparation method thereof. The sulfur-tolerant shift catalyst employs a cobalt-molybdenum two-composition active composition and a magnesium-aluminium-titanium composite carrier and does not contain alkali metals and rare earth auxiliary agents. In the catalyst raw materials, cobalt oxalate is employed for replacing cobalt nitrate, so that the phenomenon that nitrate radicals are decomposed and release nitrogen oxides in a roasting process is avoided, and cleaning, environment protection and no pollution are realized. In the preparation process, cobalt oxalate, ammonium molybdate, ammonium oxalate and / or ammonium carbonate are dissolved in distilled water through heating and stirring, so that a solution containing both cobalt and molybdenum active compositions is prepared through a one-step method, the solution is directly added into a carrier material and the mixture is subjected to kneading forming. The operation steps are simplified, the distribution manner of the active compositions cobalt and molybdenum is improved, and the synergic effect of the two compositions is enhanced. The catalyst is capable of satisfying shift technology requirements such as high pressure, high space velocity, high water-gas ratio, relatively high temperature and the like.

Description

technical field [0001] The invention belongs to the technical field of sulfur-resistant shifting in coal chemical industry, and in particular relates to a sulfur-tolerant shifting catalyst and a preparation method thereof. Background technique [0002] H in syngas can be adjusted by water gas shift reaction 2 The ratio of CO to provide process gas with a specific composition for related chemical processes, such as coal-to-hydrogen H 2 / CO=∞, coal to natural gas H 2 / CO=3, coal to methanol and Fischer-Tropsch synthetic oil H 2 / CO=2 etc. In the shift reaction process, the shift catalyst with good catalytic activity and activity stability is the key to ensure the long-term stable operation of the device. Among them, the cobalt-molybdenum-based sulfur-tolerant shift catalyst has the most outstanding performance in domestic industrial applications due to its characteristics of wide temperature range, high shift activity, good sulfur resistance and anti-poisoning performance....

Claims

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Application Information

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IPC IPC(8): B01J23/882C01B3/16
CPCY02P20/52
Inventor 赵庆鲁余汉涛白志敏齐焕东田兆明王昊姜建波薛红霞
Owner CHINA PETROLEUM & CHEM CORP
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