Wide-temperature full methanation catalyst and preparation method thereof

A complete methanation and catalyst technology, applied in the field of wide temperature complete methanation catalyst and its preparation

Active Publication Date: 2011-04-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many patented technologies involving complete methanation catalysts, some of which have also achieved commercial operation in the Great Plains natural gas plant in the United States, there is still no record of real long-term industrial operation above 600 °C

Method used

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  • Wide-temperature full methanation catalyst and preparation method thereof
  • Wide-temperature full methanation catalyst and preparation method thereof
  • Wide-temperature full methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Embodiment 1: Catalyst A

[0073] (1) Weigh 124.5g Ni(NO 3 ) 2 .6H 2 O, 223.5g Al(NO 3 ) 3 .9H 2 O, 15g La(NO 3 ) 3 .6H 2 O, 1M Zr(NO 3 ) 4 Solution 97.5mL, add deionized water to dissolve to 1000mL;

[0074] (2) Weigh 150g of urea, add 500mL of deionized water to dissolve;

[0075] (3) After mixing the solutions (1) and (2), add deionized water to 2000mL;

[0076] (4) Under stirring conditions, heat the solution to 90°C, keep the reaction for 40 hours, the pH rises from 2.3 to 4.5, and precipitation occurs, and the final pH is about 7;

[0077] (5) Filter the precipitate, wash twice with 1000mL deionized water; dry at 110°C for 12 hours; place the sample in a muffle furnace after drying, and roast at 500°C for 2 hours at a heating rate of 2°C / min; the resulting product is added with 3% Graphite and 2% cellulose were uniformly ground, shaped, and then calcined in a muffle furnace at 500° C. for 2 hours to form a catalyst precursor.

[0078] The obtained ca...

Embodiment 2

[0085] Example 2: Catalyst B

[0086] (1) Weigh 124.5g Ni(NO 3 ) 2 .6H 2 O, 223.5g Al(NO 3 ) 3 .9H 2 O, 15gLa(NO 3 ) 3 .6H 2 O, add deionized water to dissolve to 1000mL, under stirring conditions, and heat to 50°C;

[0087] (2) Measure 1M Zr(NO 3 ) 4 Solution 97.5mL was added to the mixed solution (1), and stirred for 20 minutes to form a mixed solution;

[0088] (3) Weigh 275g of NH 4 HCO 3 , add deionized water to form a 500mL solution, and then evenly drop it into the mixed solution (2) under the condition of vigorous stirring for 70 minutes; the pH is less than

[0089] 8. Keep the liquid temperature at 50°C and stir for 2 hours;

[0090] (4) filter the precipitate; wash twice with 1000mL deionized water; dry at 110°C for 12 hours;

[0091] After drying, the sample is placed in a muffle furnace, and the temperature is raised to 500°C at a heating rate of 2°C / min and roasted for 2 hours; the resulting product is shaped with 3% graphite and 2% cellulose, and ...

Embodiment 3

[0119] Embodiment 3: Catalyst F

[0120] (1) Weigh 71.5g Ni(NO 3 ) 2 .6H 2 O, 323g Al(NO 3 ) 3 .9H 2 O, 15g La(NO 3 ) 3 .6H 2 O, 1M Zr(NO 3 ) 4 Solution 97.5mL, add deionized water to dissolve to 1000mL;

[0121] (2) Weigh 160g of urea, add 500mL of deionized water to dissolve;

[0122] (3) After mixing the solutions (1) and (2), add deionized water to 2000mL;

[0123] (4) Under stirring conditions, heat the solution to 90°C, keep the reaction for 40 hours, the pH rises from 2.3 to 4.5, and precipitation occurs, and the final pH is about 7;

[0124] (5) Filter the precipitate, wash twice with 1000mL deionized water; dry at 110°C for 12 hours; place the sample in a muffle furnace after drying, and roast at 500°C for 2 hours at a heating rate of 2°C / min; the resulting product is added with 3% Graphite and 2% cellulose were uniformly ground, shaped, and then calcined in a muffle furnace at 500° C. for 2 hours to form a catalyst precursor.

[0125] The obtained catal...

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Abstract

The invention provides a wide-temperature full methanation catalyst and a preparation method thereof. The methanation catalyst is characterized in that: nickel is used as a main active ingredient, a composition formed by zirconium oxide and one or more of aluminum oxide and nickel-aluminum compounds is used as a main carrier, and lanthanum oxide is used as a cocatalyst; and a catalyst precursor is prepared by using a chemical precipitation process, and the catalyst precursor is reduced into the catalyst by filtering, washing, roasting, forming and re-roasting. The methanation catalyst has excellent catalytic activity and stability in a use range of between 260 and 750 DEG C, and fully meets the requirements of a full methanation process of synthesis gas on high temperature resistance, high hydrothermal stability and low-temperature high activity of the catalyst.

Description

technical field [0001] The invention belongs to the technical field intersecting catalysts and inorganic synthesis chemistry, relates to a catalyst for methanation of carbon monoxide and carbon dioxide and a preparation method thereof, in particular to a wide-temperature complete methanation catalyst and a preparation method thereof. Background technique [0002] Methanation reaction is an important hydrogenation reaction with a wide range of applications. Using methanation technology to reduce CO in gas x Methanation to produce substitute natural gas not only greatly increases the calorific value of gas, but also increases the safety of its transportation and use. It is an effective solution to improve social and economic benefits and alleviate the shortage of natural gas. Syngas methanation is also one of the best ways to cleanly utilize coal. This technology can also greatly reduce air pollution caused by traditional coal combustion and utilization methods, such as acid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/03C07C9/04C07C1/04C07C1/12
Inventor 王树东孙天军袁中山彭家喜张纯希孔庆单袁权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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