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Titanium-containing nickel-based catalyst, as well as preparation method and application thereof

A catalyst, titanium-nickel technology, applied in the field of titanium-nickel-based catalysts, to achieve the effects of reducing carbon deposition, improving hydrothermal stability, and increasing surface area

Inactive Publication Date: 2012-01-04
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, domestic methanation technology is mainly used in ammonia synthesis plants to remove a small amount of carbon oxides and the calorific value of city gas. Most of the catalysts used are suitable for low temperature and normal pressure conditions, and are not suitable for methanation reactions under high temperature conditions.

Method used

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  • Titanium-containing nickel-based catalyst, as well as preparation method and application thereof
  • Titanium-containing nickel-based catalyst, as well as preparation method and application thereof

Examples

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preparation example Construction

[0110] In a more preferred embodiment, the preparation method of the present invention comprises the following steps:

[0111] (a) dissolving nickel nitrate, lanthanum nitrate, titanium compound (or titanium precursor) in deionized water, removing insoluble impurities, and keeping the solution temperature at 40-80°C;

[0112] (b) Use 10% to 20% ammonium bicarbonate aqueous solution as a precipitant, add the precipitant to the solution obtained in step (a), preferably co-precipitate nickel, lanthanum, titanium compounds (or titanium precursors) by co-current continuous pumping body) aqueous solution, and keep the precipitation temperature at a temperature of 30-90°C, and keep stirring at a pH of 6-9. After the precipitation is completed, continue to keep aging at 30-90°C for 1-8 hours.

[0113] (c) Filtrate and wash the precipitated slurry obtained in the previous step, and control the conductivity and the content of impurity ions such as acid radicals within the allowable rang...

Embodiment 1

[0129] Respectively 779 grams of nickel nitrate nonahydrate, 39.87 grams of lanthanum nitrate and 1157.6 grams of titanium nitrate-nitric acid solution (16%) are dissolved (diluted) in distilled water respectively, are mixed with 15% nickel nitrate solution, and then mixed with 10% nitric acid Mix the lanthanum solution evenly, and at the same time dilute the titanium nitrate-nitric acid solution into a 5% titanium nitrate aqueous solution, and dissolve at the same time to obtain a 15% sodium carbonate solution. Use a peristaltic pump to add the above-mentioned solutions to a 10L stirring tank, jacketed The heating temperature was kept at 70°C, the transmission speed of the peristaltic pump was carried out according to the metering ratio of the acidic and alkaline solutions, and the precipitation was completed under the conditions of a stirring rate of 100 rpm and a pH of 7.0, and aging for 1 hour. The resulting sedimented slurry was washed with a centrifuge and deionized water...

Embodiment 2

[0131] 779 grams of nickel nitrate, 39.87 grams of lanthanum nitrate and 1736.43 grams of titanium nitrate-nitric acid solution (16%) were respectively dissolved (diluted) in distilled water to prepare 10% nickel nitrate solution, and then mixed with 10% lanthanum nitrate solution Mix evenly, dilute the titanium nitrate-nitric acid solution into 5% titanium nitrate aqueous solution, and dissolve at the same time to obtain a 15% sodium carbonate solution. Use a peristaltic pump to add the above-mentioned solutions to a 10L stirring tank and heat the jacket to keep the temperature At 70°C, the transmission speed of the peristaltic pump should be carried out according to the metering ratio of acidic and alkaline solutions. Under the conditions of a stirring rate of 100 rpm and a pH of 7.0, the precipitation was completed and aged for 2 hours. The resulting sedimented slurry was washed with a centrifuge and deionized water for 4 times, and the conductivity of the filtrate was teste...

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Abstract

The invention relates to a titanium-containing nickel-based catalyst, as well as a preparation method and application thereof. The titanium-containing nickel-based catalyst comprises NiO (A), vector (B), TiO2 (C) and at least one rare-earth metal oxide RE2O3 (D), wherein the vector comprises Al2O3. The invention also relates to a method for preparing the titanium-containing nickel-based catalyst, which comprises the following steps: (a) nickel cation, rare-earth metal cationic aqueous solution and titanium precursor aqueous solution are provided; (b) the solution in the step (a) is precipitated by using precipitator to obtain suspension or slurry; (c) the suspension or slurry obtained in the step (b) is separated to obtain solid precipitate, and the solid precipitate is mixed with alumina sol, or mixed with Al cationic aqueous solution to form sol; and (d) the sol is granulated and calcined to obtain a high-temperature methanation catalyst. The catalyst contains TiO2 structure auxiliary, so that the carbon deposit phenomenon in the methanation reaction is wakened.

Description

technical field [0001] The invention relates to a titanium-nickel-based catalyst, especially a titanium-nickel-based catalyst for methanation reaction, its preparation method and application. Background technique [0002] As a clean energy, natural gas is mainly composed of methane (CH 4 ). With the development of industry and the improvement of people's living standards, the demand for natural gas is currently showing rapid growth. However, the supply of natural gas in my country is far from enough to demand, and a large amount of natural gas is imported every year. [0003] Coal-to-natural gas technology consists of four parts: coal gasification, partial transformation, coal gas purification and methanation. The core of this route is coal gasification and methanation technology. The former is relatively mature, so methanation technology has attracted much attention. The key is the methanation catalyst. Due to the high content of syngas generated by the current coal gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C1/04C07C9/04C10L3/08
Inventor 蔺华林李克健赵利军
Owner CHNA ENERGY INVESTMENT CORP LTD
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