Methane cracking catalyst and preparation method thereof

A technology for cracking catalysts and catalysts, which is applied in the directions of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve problems such as increasing reaction temperature and easy deactivation of Ni catalysts, and achieve uniform and stable composition. The effect of high tone and dispersion

Inactive Publication Date: 2020-05-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Methane cracking is an endothermic reaction, increasing the reaction temperature is beneficial to increase the rate of methane cracking, but the Ni catalyst is easily deactivated under high temperature conditions

Method used

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  • Methane cracking catalyst and preparation method thereof
  • Methane cracking catalyst and preparation method thereof
  • Methane cracking catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 20 g of NaOH solid, dissolve in 250 mL of deionized water, stir for 10 min, and make 2 mol / L NaOH aqueous solution. Moore (Ni 2+ +Cu 2+ ):Al 3+ = 75:25, Ni 2+ :Cu 2+ = 90:10, weigh 7.8513g Ni (NO 3 ) 2 ·6H 2 O, 0.7248g Cu(NO 3 ) 2 ·3H 2 O, 3.7513g Al(NO 3 ) 3 9H 2 O was dissolved in 100 mL deionized water and stirred for 10 min to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar mass is Al(NO 3 ) 3 9H 2 Half of the molar weight of O weighs 0.5300gNa 2 CO 3 , dissolved in 100 mL deionized water as the base solution. Use the dropping funnel to drop the nickel-copper-aluminum nitrate mixed solution into the solution containing Na 2 CO 3 solution in a beaker with constant stirring. At the same time, use a peristaltic pump to slowly drop the precipitant NaOH solution into the beaker at a rate of 35 drops / min, maintain the precipitation pH = 10 ± 0.5, continue to stir for 1 h after the addition, then let it s...

Embodiment 2

[0033] Weigh 20 g of NaOH solid, dissolve in 250 mL of deionized water, stir for 10 min, and make 2 mol / L NaOH aqueous solution. Moore (Ni 2+ +Cu 2+ ):Al 3+ = 75:25, Ni 2+ :Cu 2+ = 80:20, weigh 6.9790g Ni (NO 3 ) 2 ·6H 2 O, 1.4496g Cu(NO 3 ) 2 ·3H 2 O, 3.7513g Al(NO 3 ) 3 9H 2 O was dissolved in 100 mL deionized water and stirred for 10 min to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar mass is Al(NO 3 ) 3 9H 2 Half of the molar weight of O weighs 0.5300gNa 2 CO 3 , dissolved in 100 mL deionized water as the base solution. Use the dropping funnel to drop the nickel-copper-aluminum nitrate mixed solution into the solution containing Na 2 CO 3 solution in a beaker with constant stirring. At the same time, use a peristaltic pump to slowly drop the precipitant NaOH solution into the beaker at a rate of 35 drops / min, maintain the precipitation pH = 10 ± 0.5, continue to stir for 1 h after the addition, then let it st...

Embodiment 3

[0036] Weigh 20 g of NaOH solid, dissolve in 250 mL of deionized water, stir for 10 min, and make 2 mol / L NaOH aqueous solution. Moore (Ni 2+ +Cu 2+ ):Al 3+ = 75:25, Ni 2+ :Cu 2+ = 70:30, weigh 6.1066g Ni (NO 3 ) 2 ·6H 2 O, 2.1744g Cu(NO 3 ) 2 ·3H 2 O, 3.7513g Al(NO 3 ) 3 9H 2 O was dissolved in 100 mL deionized water and stirred for 10 min to completely dissolve the nitrate to obtain a mixed solution. Press Na 2 CO 3 The molar mass is Al(NO 3 ) 3 9H 2 Half of the molar weight of O weighs 0.5300gNa 2 CO 3 , dissolved in 100 mL deionized water as the base solution. Use the dropping funnel to drop the nickel-copper-aluminum nitrate mixed solution into the solution containing Na 2 CO 3 solution in a beaker with constant stirring. At the same time, use a peristaltic pump to slowly drop the precipitant NaOH solution into the beaker at a rate of 35 drops / min, maintain the precipitation pH = 10 ± 0.5, continue to stir for 1 h after the addition, then let it s...

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Abstract

The invention discloses a methane cracking catalyst and a preparation method thereof, and belongs to the technical field of methane cracking catalyst preparation. According to the catalyst, nickel-copper alloy nanoparticles are used as an active phase, and aluminum oxide is used as a structural aid; the preparation method comprises the following steps: firstly, synthesizing nickel-copper-aluminumlayered composite hydroxide as a catalyst precursor by adopting a coprecipitation method, roasting and decomposing at 500 DEG C to form a rock salt type nickel oxide-copper oxide-aluminum oxide solidsolution, and then carrying out hydrogen reduction treatment at 800 DEG C to generate the highly-dispersed nickel-copper alloy nanoparticles in situ. The average grain size of the nickel-copper alloyof the catalyst is 9-10 nm, the nickel-copper alloy has the characteristics of uniform composition and adjustable composition, the catalyst shows good catalytic performance on high-temperature methanecracking reaction, the carbon yield at the reaction temperature of 650 DEG C can reach 70 g carbon per gram of the catalyst, and carbon nanotubes of a bamboo joint type structure can be obtained.

Description

technical field [0001] The invention belongs to the technical field of methane cracking catalyst preparation, and in particular relates to a methane cracking catalyst and a preparation method thereof. [0002] technical background [0003] Hydrogen is a high-quality clean fuel that can be converted into electricity and other low-polluting energy forms in various ways without causing environmental problems. Due to the extremely low content of hydrogen in nature, industrial large-scale hydrogen production is mainly through coal gasification, naphtha steam reforming, partial oxidation, or natural gas steam reforming, autothermal reforming, or alcohol steam reforming. Compared with other fossil fuels, natural gas is the best raw material for producing hydrogen, and its main component is methane, which has the highest ratio of hydrogen to carbon. Steam reforming of methane is currently the world's largest and most economical hydrogen production technology, accounting for about 50...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/03B01J37/08B01J37/18B01J35/02B82Y30/00B82Y40/00C01B3/26C01B32/162
CPCB01J23/755B01J37/03B01J37/08B01J37/18B01J35/023B82Y30/00B82Y40/00C01B3/26C01B32/162C01B2203/0277C01B2203/1076C01B2203/1058C01B2203/1241
Inventor 李达林施泽敏黄敏江莉龙
Owner FUZHOU UNIV
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