Catalyst and method for producing nanometer carbon and hydrogen

A nano-carbon and catalyst technology, which is applied in the field of catalysts for the production of nano-carbon and hydrogen, can solve problems such as industrialization obstacles of operating costs, and achieve the effect of high selectivity and cost reduction.

Inactive Publication Date: 2014-02-12
上海永鸿实业集团化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the existing methods of cracking lower hydrocarbons to produce nano-carbons must require high-purity hydrocarbon raw materials, the need for hydrocarbon re

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, preparation of catalyst

[0027] Ni(NO 3 ) 2 ·6H 2 O 15g Add methanol 500mL, stir to dissolve, then add Mg(NO3 ) 2 ·6H 2 20 g of O, 20 g of citric acid, and 200 mL of deionized water were heated and stirred at 50°C for 1 hour, and most of the methanol and water were removed by a rotary evaporator. The solid was sintered in air at 100°C to 600°C for a total of 8 hours, and then reduced with hydrogen for 5 hours to obtain a metal nickel magnesium oxide catalyst, wherein the weight content of Ni was 50%.

[0028] Step 2, cleavage reaction

[0029] Quartz fiber is placed in the middle of a quartz tube with an inner diameter of 1 inch, and 2 g of the catalyst prepared above is placed on the quartz fiber. The flow rate of hydrogen gas is 100 sccm, and the temperature of the electric furnace is 500 ° C. The catalyst is re-reduced for 3 hours, and then nitrogen enters the reaction tube at a flow rate of 100 sccm. Flushing was performed at the same temperature,...

Embodiment 2

[0034] Step 1, preparation of catalyst

[0035] Co(NO 3 ) 2 ·6H 2 O 15g, add propanol 500mL, stir to dissolve, then add Mg(NO 3 ) 2 ·6H 2 20 g of O, 13 g of oxalic acid, and 200 mL of deionized water were heated and stirred at 55°C for 1.8 hours, and most of the methanol and water were removed by a rotary evaporator. The solid was sintered at 100°C to 600°C in air for a total of 8 hours, and then reduced with hydrogen for 5 hours to obtain a metal cobalt magnesium oxide catalyst with a Co weight content of 50%.

[0036] Step 2, cleavage reaction

[0037] Quartz fiber is placed in the middle of a quartz tube with an inner diameter of 1 inch, and 2 g of the catalyst prepared above is placed on the quartz fiber. The flow rate of hydrogen gas is 100 sccm, and the temperature of the electric furnace is 500 ° C. The catalyst is re-reduced for 3 hours, and then nitrogen enters the reaction tube at a flow rate of 100 sccm. Flushing was performed at the same temperature, and...

Embodiment 3

[0042] Step 1, preparation of catalyst

[0043] Fe(NO 3 ) 3 9H 2 O 20g, add propanol 500mL, stir to dissolve, then add Mg(NO 3 ) 2 ·6H 2 20 g of O, 20 g of citric acid, and 200 mL of deionized water were heated and stirred at 47°C for 1 hour, and most of the methanol and water were removed by a rotary evaporator. The solid was sintered at 100°C to 600°C in air for a total of 8 hours, and then reduced with hydrogen for 5 hours to obtain a metal iron magnesium oxide catalyst with a Fe weight content of 50%.

[0044] Step 2, cleavage reaction

[0045] Quartz fiber is placed in the middle of a quartz tube with an inner diameter of 1 inch, and 2 g of the catalyst prepared above is placed on the quartz fiber. The flow rate of hydrogen gas is 100 sccm, and the temperature of the electric furnace is 500 ° C. The catalyst is re-reduced for 3 hours, and then nitrogen enters the reaction tube at a flow rate of 100 sccm. Flushing was performed at the same temperature, and the G...

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PUM

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Abstract

The present invention provides a method for producing nanometer carbon and hydrogen. The method comprises: adopting a hydrocarbon as a raw material, carrying out catalysis cracking on the hydrocarbon at a temperature of 500-850 DEG C under a pressure of 0-1 MPa to obtain a nanometer carbon crude product and hydrogen, calcining the nanometer carbon crude product for 0.8-1.5 h at a temperature of 250-400 DEG C, refluxing for 2-5 h in concentrated hydrochloric acid, collecting the solid, and drying to obtain the pure nanometer carbon. With the catalyst and the method for producing nanometer carbon and hydrogen through hydrocarbon cracking, the amorphous carbon precursor or the by-product can be eliminated, and the raw materials containing carbon dioxide, oxygen, water and other gases can be adopted to perform production; and the raw material purity requirement is reduced, and the production cost is substantially reduced.

Description

technical field [0001] The invention relates to a catalyst and a method for producing nano-carbon and hydrogen, in particular to a catalyst and a method for producing nano-carbon and hydrogen by cracking hydrocarbons as raw materials. Background technique [0002] The cracking of low-level hydrocarbons (hydrocarbons) into carbon and hydrogen is an endothermic reaction. If you want to achieve a high conversion rate through a one-step reaction, you need a higher reaction temperature. However, due to the higher decomposition reaction temperature for decomposition Lower hydrocarbons lead to an increase in the reaction rate, resulting in the formation of a large amount of solid carbon on the surface of the solid catalyst. In addition to some functional nano-carbons and carbon nanofibers, this solid carbon also contains amorphous carbon by-products. The formation of amorphous carbon will lead to the reaction with the metal catalyst, resulting in an inert metal carbide covering th...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B3/26B01J23/755B01J23/75B01J23/745C01B32/15
Inventor 金伊男
Owner 上海永鸿实业集团化学科技有限公司
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