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Low-cost sulfur-tolerant shift catalyst and preparation method

A sulfur-resistant shift and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. and preparation methods, etc., to achieve the effects of good structure and activity stability, long service life and low loss rate

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are no reports or patents on the use of fly ash as a raw material for sulfur-tolerant shift catalysts and its preparation methods

Method used

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  • Low-cost sulfur-tolerant shift catalyst and preparation method
  • Low-cost sulfur-tolerant shift catalyst and preparation method
  • Low-cost sulfur-tolerant shift catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]First, the fly ash was roasted at 800°C for 3 hours, and then crushed through a 220-mesh sieve. The total mass content of silica and alumina in fly ash is 70%.

[0037] Dissolve 4.2g ammonium molybdate with 40.0ml deionized water to obtain molybdenum-containing solution A; dissolve 3.8g cobalt nitrate with 30.0ml deionized water; then add 11g cerium nitrate, 3.0g citric acid and 3.0g oxalic acid to the In the above solution, stir and dissolve to obtain solution B containing cobalt.

[0038] Weigh 68.0g of fly ash, 14.0g of magnesium oxide, 10.0g of metatitanic acid, 3.0g of scallop powder, mix well, add solution A, knead evenly; then add solution B, knead, shape, dry naturally, at 530 ℃ for 3 h, and then cooled down to room temperature naturally.

[0039] The calcined catalyst was soaked in deionized water at 40°C for 6 hours, taken out, air-dried, calcined at 300°C for 2 hours, and then cooled to room temperature naturally to obtain the finished sulfur-tolerant shift ...

Embodiment 2

[0041] First, the fly ash was roasted at 800°C for 3 hours, and then crushed through a 200-mesh sieve. The total mass content of silica and alumina in fly ash is 72%.

[0042] Dissolve 5.3g ammonium molybdate with 40.0ml deionized water to obtain solution A containing molybdenum; dissolve 4.2g nickel acetate with 35.0ml deionized water; then add 0.8g lanthanum nitrate and 5.0ml 20% dilute nitric acid respectively into the above solution, stirring and dissolving to obtain solution B containing nickel.

[0043] Weigh 51.0g of fly ash, 28.0g of alumina, 21.0g of magnesium carbonate, 12.5g of metatitanic acid, and 3.0g of starch and mix evenly, add solution A, and knead evenly; then add solution B, knead, shape, and dry naturally. Calcined at 550°C for 2h, then cooled down to room temperature naturally.

[0044] Soak the calcined catalyst in deionized water for 10 hours at room temperature, take it out, let it dry naturally, calcinate it at 500°C for 1 hour, and then cool it dow...

Embodiment 3

[0046] First, the fly ash was roasted at 900°C for 3 hours, and then crushed through a 200-mesh sieve. The total mass content of silica and alumina in fly ash is 78%.

[0047] Dissolve 8.2g of ammonium metatungstate in 40.0ml of deionized water to obtain solution A containing tungsten; dissolve 4.2g of nickel nitrate in 35.0ml of deionized water; then add 1.0g of lanthanum nitrate and 3.0g of oxalic acid into the above solution , stirring and dissolving to obtain a mixed solution B containing nickel and additives.

[0048] Weigh 25.0g of fly ash, 45.0g of pseudoboehmite, 14.0g of alumina, 5.0g of magnesium oxide, 12.0g of magnesium oxalate, 10.0g of titanium oxide, and 3.0g of Tianqing powder, mix them evenly, add solution A, and knead evenly; Then add solution B, knead, shape, dry naturally, bake at 500°C for 3h, and then cool down to room temperature naturally.

[0049] Soak the calcined catalyst in deionized water for 6 hours at room temperature, take it out, let it air d...

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Abstract

The invention provides a low-cost sulfur-tolerant shift catalyst and a preparation method. The low-cost sulfur-tolerant shift catalyst adopts magnesium, aluminum, silicon and titanium as carrier components, wherein oxides of the aluminum and the silicon mainly come from coal ash in a coal-fired thermal power plant; cobalt and molybdenum are taken as active components; and rear earth metal is taken as a coagent. The coal ash with a wide source and a low cost is taken as a raw material of the catalyst to partially or totally replace common aluminum oxide or aluminum-contained compounds in the conventional catalyst, so that the production cost of the catalyst can be greatly reduced, an effective utilization means is created for the coal ash, the great pressure on an ecological environment caused by the coal ash is alleviated, and the catalyst has good economical benefits and environmental protection benefits. The catalyst provided by the invention has the advantages of high intensity, good structural and active stability, low wastage rate of active components, and long service life, and is applicable to conditions with high pressure, a high air speed and a high water-air ratio.

Description

technical field [0001] The invention belongs to the technical field of sulfur-resistant shifting of synthetic gas produced from heavy raw materials such as residual oil, heavy oil, petroleum coke and coal, and in particular relates to a sulfur-resistant shifting catalyst and a preparation method thereof. Background technique [0002] The cobalt-molybdenum-based sulfur-resistant wide-temperature shift catalyst is mainly used to meet the needs of producing raw material gas from heavy raw materials such as heavy oil, residual oil, and coal. °C shows excellent activity, which is equivalent to that of copper-based low-temperature shift catalysts, and its heat resistance is comparable to that of iron-chromium-based high-temperature shift catalysts. Therefore, it has a very wide active temperature range, covering almost the entire active temperature range of the iron-based high-temperature shift catalyst and the copper-based low-temperature shift catalyst. Its most prominent advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J23/887C01B3/16
CPCY02P20/52
Inventor 白志敏余汉涛齐焕东赵庆鲁田兆明陈依屏王昊郭建学姜建波李文柱郭杰刘月娟
Owner CHINA PETROLEUM & CHEM CORP
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