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Methanation catalyst and preparation method thereof

A methanation catalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of narrow operating temperature range of methane catalysts, and achieve improved Better performance, improve the efficiency of metal use, and facilitate the effect of diffusion

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem in the prior art that the use temperature range of methane catalyst is too narrow, the present invention discloses a methanation catalyst and a preparation method thereof, which can maintain good reactivity and stability in a wide temperature range

Method used

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  • Methanation catalyst and preparation method thereof
  • Methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh the alumina (γ-Al 2 o 3 ) 100 grams of carrier, denoted as A.

[0049] 6.68 grams of magnesium nitrate [Mg(NO 3 ) 2 ·6H 2 O] Dissolved with 85 grams of deionized water, dipped on A, baked at 110° C. for 3 hours, and then roasted and decomposed at 350° C. and 450° C. for 2 hours respectively in an air atmosphere to obtain B1.

[0050] 109.7 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], 3.6 grams of 50% manganese nitrate [Mn(NO 3 ) 2 ] with 27.1 grams of citric acid [C 6 h 8 o 7 ·H 2 O] miscible, the ratio of the total moles of carboxyl groups to the total moles of metal ions is 0.5, after dissolving with 51 grams of deionized water, impregnate on B1. Bake at 110°C for 5 hours to obtain C1.

[0051] After C1 was decomposed by roasting at 300°C and 450°C for 3 hours in an air atmosphere, a catalyst containing 20% ​​by weight of nickel, 0.5% by weight of manganese and 0.5% by weight of magnesium was obtained, and the components nickel and manganese only...

Embodiment 2

[0054] Weigh the alumina (γ-Al 2 o 3 ) 100 grams of carrier, denoted as A.

[0055] 169.3 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O] with 81.6 grams of citric acid [C 6 h 8 o 7 ·H 2 O] miscibility, the ratio of the total moles of carboxyl groups to the total moles of nickel ions is 1, after adding 82 grams of deionized water to dissolve, impregnate on A. Baked at 110°C for 5 hours, and then fired at 300°C and 400°C for 2 hours to decompose to obtain B2.

[0056] 89.0 grams of 50% manganese nitrate [Mn(NO 3 ) 2 ], 34.8 g citric acid [C 6 h 8 o 7 ·H 2 O], the ratio of the total moles of carboxyl groups to the total moles of manganese ions is 1, after adding 12 grams of deionized water to dissolve, impregnate on B2. Bake at 110°C for 4 hours, and then bake at 300°C and 350°C for 2 hours to decompose to obtain C2.

[0057] 4.9 grams of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O] after dissolving with 89 grams of deionized water, impregnate on C2, bake 2 hours at ...

Embodiment 3

[0060] Weigh the alumina (γ-Al 2 o 3 ) 100 grams of carrier, denoted as A3.

[0061] 6.68 grams of magnesium nitrate [Mg(NO 3 ) 2 ·6H 2 O] After dissolving with 85 grams of deionized water, impregnate A3, bake at 110°C for 3 hours, and then roast and decompose it at 300°C and 450°C for 2 hours in an air atmosphere to obtain B3.

[0062] 109.7 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], 3.6 grams of 50% manganese nitrate [Mn(NO 3 ) 2 ] with 27.1 grams of citric acid [C 6 h 8 o 7 ·H 2 O] miscible, the ratio of the total moles of carboxyl groups to the total moles of metal ions is 0.5, after adding 50 grams of deionized water to dissolve, impregnate on B3. Bake at 110°C for 5 hours to obtain C3.

[0063] After C3 is roasted and decomposed at 300°C and 450°C for 4 hours in an air atmosphere, a catalyst containing 20% ​​by weight of nickel, 0.5% by weight of manganese and 0.5% by weight of magnesium is obtained, and the components nickel and manganese only exist in...

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Abstract

The invention discloses a methanation catalyst and a preparation method thereof. The methanation catalyst comprises the following components: a) nickel oxide, wherein nickel content is 5-50wt%; b) manganese oxide, wherein manganese content is 0.1-15wt%; c) at least one of oxides of beryllium, manganese, calcium, strontium, barium, lanthanum and cerium, wherein metal content is 0.5-20wt%; the components a) and b) are distributed within the range from the surface of carrier particles to a position 1 / 2 radius away from the center, and the component c) is distributed into the whole carrier particles. The preparation method disclosed by the invention comprises the following steps of: 1) mutually dissolving nickel salt and / or manganese salt with organic acid, preparing salt of the component c) into aqueous solution; and 2) dipping supported components nickel, manganese and the component c), wherein the component c) is independently supported, and baking and sintering decomposition treatment are carried out after supporting every time. The catalyst disclosed by the invention can maintain better catalytic activity and stability in a wider temperature range and has good catalytic effect.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a methanation catalyst and a preparation method thereof. Background technique [0002] Methanation reaction is an important research topic in carbon-chemistry, and it is the simplest Fischer-Tropsch synthesis reaction. The reaction equation is [0003] [0004] [0005] There are two main application areas of methanation reaction, one is as a high-concentration CO hydrogenation conversion, and the other is the removal of carbon oxides in hydrogen-rich raw materials. The role of the former is to convert syngas or various CO and H rich 2 The raw material is transformed into city gas or substitute natural gas with higher calorific value per unit volume, safer and more stable with methane as the main component through methanation reaction; the function of the latter is to purify various process gases rich in hydrogen, such as using In ethylene plant and ammonia plant to prov...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C9/04C07C1/04
Inventor 王翀王秀玲王红亚鲁树亮徐洋
Owner CHINA PETROLEUM & CHEM CORP
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