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Fluidized bed catalyst for methanation of synthetic gas and preparation method of fluidized bed catalyst

A fluidized bed catalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low methane concentration, unfavorable product calorific value, low catalyst activity, etc., and achieve good fluidity , the effect of good methanation catalytic activity

Inactive Publication Date: 2017-07-07
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the fluidized bed methanation catalysts are all based on conventional fixed bed catalysts (mainly composed of Ni / Al 2 o 3 ) after adding various binders for molding, sieving a certain particle size for methanation fluidized bed reaction, this type of catalyst has low activity, and the concentration of methane at the reactor outlet is low, which is not conducive to increasing the calorific value of the product

Method used

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  • Fluidized bed catalyst for methanation of synthetic gas and preparation method of fluidized bed catalyst
  • Fluidized bed catalyst for methanation of synthetic gas and preparation method of fluidized bed catalyst

Examples

Experimental program
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Embodiment 1

[0029] (1) 58.16 grams of Ni (NO 3 ) 2 ·6H 2 O, 139.62 grams of Zr(NO 3 ) 4 ·5H 2 O and 26.56 g La(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 1000ml of deionized water to prepare solution A; another 99.89 grams of AR grade anhydrous Na 2 CO 3 Dissolve in 1000ml deionized water to prepare solution B;

[0030] (2) At 80°C, solutions A and B were injected into a reaction vessel at an equal velocity (the injection rate was 40ml / min), and the co-precipitation reaction was carried out under the condition of constant temperature at 80°C and constant stirring. 2 CO 3 The amount of aqueous solution added keeps the pH value of the precipitation solution at 7.2 to 7.8;

[0031] (3) Continue to stir for 60 minutes after feeding, then stop stirring, filter the feed liquid immediately, and wash the precipitate with deionized water until Na + When the ion concentration is below 0.1ppm (detected by the flame ion absorption method), 35g of ZSM-5 is then added, b...

Embodiment 2

[0034] (1) 77.55 grams of Ni(NO 3 ) 2 ·6H 2 O, 44.87 g Mg(NO 3 ) 2 ·6H 2 O, 21.25 g La(NO 3 ) 3 ·6H 2 O and 157.07 g of Zr(NO 3 ) 4 ·5H 2 O (purities are all AR grade) mixed together, add 1000ml deionized water to prepare solution A; another 132.17 grams of AR grade anhydrous Na 2 CO 3 Dissolve in 1000ml deionized water to prepare solution B;

[0035] (2) At 80°C, solutions A and B were injected into a reaction vessel at an equal velocity (the injection rate was 40ml / min), and the co-precipitation reaction was carried out under the condition of constant temperature at 80°C and constant stirring. 2 CO 3 The amount of aqueous solution added keeps the pH value of the precipitation solution at 7.2 to 7.8;

[0036] (3) Continue to stir for 60 minutes after feeding, then stop stirring, filter the feed liquid immediately, and wash the precipitate with deionized water until Na + When the ion concentration is below 0.1ppm (detected by the flame ion absorption method), 20...

Embodiment 3

[0039] (1) 108.57 grams of Ni(NO 3 ) 2 ·6H 2 O, 53.13 g La(NO 3 ) 3 ·6H 2O and 132.64 g of Zr(NO 3 ) 4 ·5H 2 O (purities are all AR grade) mixed together, add 1000ml deionized water to prepare solution A; another 124.57 grams of AR grade anhydrous Na 2 CO 3 Dissolve in 1000ml deionized water to prepare solution B;

[0040] (2) At 80°C, solutions A and B were injected into a reaction vessel at an equal velocity (the injection rate was 40ml / min), and the co-precipitation reaction was carried out under the condition of constant temperature at 80°C and constant stirring. 2 CO 3 The amount of aqueous solution added keeps the pH value of the precipitation solution at 7.2 to 7.8;

[0041] (3) Continue to stir for 60 minutes after feeding, then stop stirring, filter the feed liquid immediately, and wash the precipitate with deionized water until Na + When the ion concentration is below 0.1ppm (detected by the flame ion absorption method), 14gMCM-41 is then added, beaten an...

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Abstract

The invention provides a fluidized bed catalyst for methanation of synthetic gas, and a preparation method and application of the fluidized bed catalyst. The fluidized bed catalyst is prepared from the following components by counting with oxide: active component Ni accounting for 2 to 65 percent of the total weight of the catalyst, aid M accounting for 0.1 to 50 percent of the total weight of the catalyst, first carrier ZrO2 accounting for 1 to 80 percent of the total weight of the catalyst and the balance of second carriers, wherein the aid M is oxides of one or more of Fe, Co, Mo, Mg, Sc, Cr, Ti, Al, Y, La, Ce, Yb and Sm, and the second carriers are one or more molecular sieves of ZSM-5, SAPO-34 and MCM-41. The catalyst prepared by the invention has the following characteristics: 1, the catalyst has good mobility and is applicable to a fluidized bed; and 2, the catalyst is good in methanation catalytic activity. The preparation method of the catalyst provided by the invention is efficient and simple.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a fluidized bed catalyst for producing methane from synthesis gas and a preparation method thereof. Background technique [0002] Natural gas is a clean and efficient energy product whose main component is methane. Optimizing the use of my country's relatively abundant coal resources to prepare methane (synthetic natural gas) will not only contribute to my country's energy strategic security, but also improve the current situation of my country's atmospheric environment. [0003] The core of coal-to-synthetic natural gas is methanation. The methanation reaction is a strong exothermic reaction. The fluidized bed methanation reaction technology has the characteristics of good heat transfer and mass transfer, which can reduce the use of circulating compressors and help reduce investment and operating costs. It is the development of methanation technology one of the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/04B01J29/46B01J29/85C10L3/08
CPCB01J29/46B01J29/0333B01J29/044B01J29/85B01J2229/20C10L3/08
Inventor 李春启黄艳辉于博文段世慈陈爱平周帅林封志伟梅长松
Owner DATANG INT CHEM TECH RESINST