Catalyst for preparation of synthetic gas through partial oxidation of methane, and preparation method and application thereof

A methane catalytic part and catalyst technology, applied in the field of methane partial oxidation to synthesis gas catalyst and its preparation and application, can solve the problems of catalyst performance, loss of metal active components, catalyst structure change, etc. Large-scale production, high methane conversion rate, and easy control of conditions

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing catalyst systems have to face the following problems: 1. Partial oxidation of methane to synthesis gas is a mild exothermic reaction (ΔH θ 298K =-36KJ/mol), but the reaction speed is very fast, concentrated heat release, easy to generate hot spots, resulting in metal accumulation; 2. The two main side reactions of carbon monoxide disproportionation and methane thermal cracking at high temperature are easy to cause carbon deposition on the catalyst, especial

Method used

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  • Catalyst for preparation of synthetic gas through partial oxidation of methane, and preparation method and application thereof
  • Catalyst for preparation of synthetic gas through partial oxidation of methane, and preparation method and application thereof
  • Catalyst for preparation of synthetic gas through partial oxidation of methane, and preparation method and application thereof

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Example Embodiment

[0019] Example 1

[0020] Weigh 2.91gNi(NO 3 ) 2 6H 2 O, 2.91gCo(NO 3 ) 2 6H 2 O, dissolved in 30g deionized water to prepare an aqueous solution containing nickel nitrate and cobalt nitrate. 1.16g NH 4 VO 3 Dissolve in 20g deionized water, then use with NH 4 VO 3 Treated with equimolar oxalic acid to obtain a dark blue uniform solution containing vanadium precursor, and mix it with the solution containing nickel nitrate and cobalt nitrate. Add 10.0g of alumina carrier ground to 200 meshes or more, and heat to 70 ℃. Under stirring conditions, slowly add 8wt% aqueous ammonia solution to the above solution until the pH of the solution is about 6, and nitric acid can be used to adjust. After stirring at a constant temperature of 70°C for 6 hours, stop stirring, continue to keep the temperature at a constant temperature until there is no water, dry at 110°C for 24 hours, and calcinate in air at 700°C for 8 hours to form a catalyst sample. Ni in the final catalyst 1 Co 1 V 1 O 5.5 T...

Example Embodiment

[0022] Example 2

[0023] Weigh 2.91gNi(NO 3 ) 2 6H 2 O, 1.46gCo(NO 3 ) 2 6H 2 O, dissolved in 30g deionized water to prepare an aqueous solution containing nickel nitrate and cobalt nitrate. 0.35g NH 4 VO 3 Dissolve in 20g deionized water, then use with NH 4 VO 3 Treated with equimolar oxalic acid to obtain a dark blue uniform solution containing vanadium precursor, and mix it with the solution containing nickel nitrate and cobalt nitrate, add 6.0g of alumina carrier ground to 200 mesh or more, and heat to 60 in water bath ℃. Under stirring conditions, slowly drop a 10wt% ammonia solution into the above solution until the pH of the solution is about 8, and you can use nitric acid to adjust. After stirring at a constant temperature of 60°C for 10 hours, the stirring was stopped, and the temperature was continued until there was no water. The catalyst sample was formed by drying at 120°C for 16 hours, and calcination in air at 800°C for 4 hours. Ni in the final catalyst 1 Co 0.5...

Example Embodiment

[0025] Example 3

[0026] Weigh 8.72gNi(NO 3 ) 2 6H 2 O, dissolved in 30g deionized water to prepare an aqueous solution containing nickel nitrate. 1.75g ​​NH 4 VO 3 Dissolve in 20g deionized water, then use with NH 4 VO 3 Treated with equimolar oxalic acid to prepare a dark blue uniform solution containing vanadium precursor, and mix it with the solution containing nickel nitrate uniformly, add 9.0g of alumina carrier ground to 200 mesh or more, and heat to 80°C in a water bath. Under stirring conditions, slowly add 15wt% aqueous ammonia solution to the above solution until the pH of the solution is about 10, which can be adjusted with nitric acid. After stirring at a constant temperature of 80°C for 6 hours, the stirring was stopped, and the temperature was continued until there was no water, dried at 80°C for 14 hours, and air roasted at 700°C for 8 hours to form a catalyst sample. Ni in the final catalyst 1 V 0.5 O 2.75 The weight content is 30%, denoted as C-3.

[0027] Use ...

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Abstract

The invention discloses a catalyst for preparation of synthetic gas through catalytic partial oxidation of methane. According to the invention, inorganic refractory oxide is used as a carrier, and crystalline nickel cobalt vanadium oxide is used as an active component; in terms of the weight of the catalyst, the active component accounts for 1 to 50%, preferably, 10 to 30%; the molar composition of the crystalline nickel cobalt vanadium oxide is represented by NixCoyVzOdelta, wherein x is equal to 0 to 1.0, y is equal to 0 to 1.0, z is equal to 0.1 to 1.0, x+y is less than 0, and delta refers to a value when O in the oxide reaches an equilibrium amount. A preparation method for the catalyst used for preparation of synthetic gas through catalytic partial oxidation of methane comprises the following steps: respectively dissolving nitrates of Ni and Co and an oxyacid ammonium salt of V to prepare aqueous solutions; mixing the catalyst carrier or a carrier precursor with the aqueous solutions; adjusting a pH value to 3 to 12, preferably, 5 to 10; carrying out a coprecipitation reaction under the condition of stirring; and carrying out moisture removal, drying and roasting so as to obtain the loaded crystalline nickel cobalt vanadium oxide catalyst. The catalyst has the advantages of good comprehensive performance, high dispersion of the active component, high catalytic activity, excellent carbon deposit resistance, high stability and low cost.

Description

technical field [0001] The invention relates to a catalyst for producing synthesis gas by partial oxidation of methane and its preparation method and application Background technique [0002] Synthesis of fuels and chemicals from methane through syngas is one of the effective ways to utilize natural gas. Compared with the traditional steam reforming method, the main advantages of partial oxidation of methane to synthesis gas are as follows: (1) The H2 / CO molar ratio (about 2:1) of the synthesis gas obtained is more suitable for the production of liquid hydrocarbon fuels, methanol and other oxygen-containing organic compounds, etc.; (2) The conversion process can be carried out at high space velocity, which greatly reduces the scale of gas-making equipment, thereby reducing investment and production costs; (3) It can be transformed on the basis of the original traditional process to realize methane A process for producing syngas by partial oxidation, and the production capac...

Claims

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Application Information

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IPC IPC(8): B01J23/847C01B3/40
CPCY02P20/52
Inventor 张舒冬李杰张喜文孙晓丹倪向前
Owner CHINA PETROLEUM & CHEM CORP
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