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Catalyst-absorbent complex for absorbing and strengthening low-carbon hydrocarbon steam reforming hydrogen and preparing method of complex

A technology for steam reforming and absorption enhancement, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve obstacles to rapid and full absorption of CO2, catalysts and Absorbent does not achieve uniform mixing and other problems, to achieve the effect of reducing complicated steps, good absorption performance and stability

Inactive Publication Date: 2015-01-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the microscopic scale, with the above method, the catalyst and absorber are not uniformly mixed, thus hindering the CO 2 fast and full absorption

Method used

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  • Catalyst-absorbent complex for absorbing and strengthening low-carbon hydrocarbon steam reforming hydrogen and preparing method of complex
  • Catalyst-absorbent complex for absorbing and strengthening low-carbon hydrocarbon steam reforming hydrogen and preparing method of complex
  • Catalyst-absorbent complex for absorbing and strengthening low-carbon hydrocarbon steam reforming hydrogen and preparing method of complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] At room temperature, 2.49g Ni(CH 3 COO) 2 ·6H 2 O, 3.85g Mg(NO 3 ) 2 ·6H 2 O, 8.81gCa(CH 3 COO) 2 ·H 2 O and 9.38g Al(NO 3 ) 3 ·9H 2 O was dissolved in a beaker to make a 100mL solution. Weigh 8.00g NaOH and 1.33g Na 2 CO 3 , Use a beaker to add water to dissolve and prepare a 100mL solution. Under stirring conditions, the above two mixed solutions were added dropwise to the four-necked flask at the same speed (50mL / h) with a micro-syringe pump for 2 hours, during which the pH value of the solution was adjusted to about 10. Then the obtained suspension was aged at 60°C for 12h, and then taken out and filtered and washed. The obtained light green precipitate was dried at 100°C for 12h to obtain a light green blocky solid. Finally, after grinding, it was calcined in a muffle furnace at 850°C for 5 hours to obtain catalyst-absorbent composite A. The content of each element is shown in Table 1, and the X-ray diffraction patterns before and after calcining are shown in Table ...

Embodiment 2

[0036] At room temperature, 2.18g Ni(NO 3 ) 2 ·6H 2 O, 3.21g Mg(NO 3 ) 2 ·6H 2 O, 9.69g Ca(CH 3 COO) 2 ·H 2 O and 9.38g Al(NO 3 ) 3 ·9H 2 O was dissolved in a beaker to make a 100mL solution. Weigh 8.00g NaOH and 1.33g Na 2 CO 3 , Use a beaker to add water to dissolve and prepare a 100mL solution. Under stirring conditions, the above two mixed solutions were added dropwise to the four-necked flask at the same speed (50mL / h) with a micro-syringe pump for 2 hours, during which the pH value of the solution was adjusted to about 10. Then the resulting suspension was aged for 8 hours at 60°C, and then taken out and filtered and washed. The obtained light green precipitate was dried at 100°C for 12 hours to obtain a light green blocky solid. Finally, it was ground and calcined in a muffle furnace at 850°C for 5 hours to obtain the catalyst-absorbent composite B. The content of each element is shown in Table 1.

Embodiment 3

[0038] At room temperature, add 2.91g Ni(NO 3 ) 2 ·6H 2 O, 3.59g Mg(NO 3 ) 2 ·6H 2 O, 6.34g Ca(CH 3 COO) 2 ·H 2 O and 7.50g Al(NO 3 ) 3 ·9H 2 O was dissolved in a beaker to make a 100mL solution. Weigh 6.00g NaOH and 1.03g Na 2 CO 3 , Use a beaker to add water to dissolve and prepare a 100mL solution. Under stirring conditions, the above two mixed solutions were added dropwise to the four-necked flask at the same speed (50mL / h) with a micro-syringe pump for 2 hours, during which the pH value of the solution was adjusted to about 10. Then the obtained suspension was aged at 60°C for 12h, and then taken out and filtered and washed. The obtained light green precipitate was dried at 100°C for 12h to obtain a light green blocky solid. After the final grinding, it was calcined in a muffle furnace at 900°C for 4 hours to obtain a catalyst-absorbent composite C. The content of each element is shown in Table 1.

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Abstract

The invention discloses a catalyst-absorbent complex for absorbing and strengthening low-carbon hydrocarbon steam reforming hydrogen and a preparing method of the complex, which are mainly used for the steam reforming hydrogen production through low-carbon hydrocarbons of C1-C4 and the like. The method is characterized in that a coprecipitation method is adopted to organically combine a catalyst for hydrocarbon steam reforming reaction and an absorbent for CO2 carboxylation reaction to form a whole body, so that micro-scale uniform distribution is realized, thus a precursor with a hydrotalcite structure is formed, and the catalyst-absorbent complex is prepared through high temperature sintering. The complex can effectively stimulate CO2 situ absorption, and excellent catalyzing and absorbing activities and stability of the complex are maintained through the hydrotalcite structure of the precursor. The chemical formula of the complex is Nix-Mgy-Caz-Al-O.

Description

technical field [0001] The invention relates to a catalyst-absorbent composite body for absorbing and enhancing hydrogen production by steam reforming of low-carbon hydrocarbons and a preparation method thereof, belonging to the field of hydrogen production by steam reforming of low-carbon hydrocarbons. Background technique [0002] As an important chemical raw material and clean energy, hydrogen plays a vital role in modern industry. As a chemical raw material, it can be used to synthesize important chemical products such as ammonia and methanol; as a fuel, it has the advantages of high calorific value and no pollution. At present, the most widely used in industry is the hydrogen production technology of steam reforming of low-carbon hydrocarbons (especially methane), and it is also the most mature and economical hydrogen production method. [0003] Taking hydrogen production by steam reforming of methane as an example, a two-step conversion method is currently used in ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01D53/81B01D53/62C01B3/38C01B3/40
CPCY02A50/20Y02P20/151Y02P20/52
Inventor 周志明谢苗苗徐攀魏艳菊刘宝田胜聪
Owner EAST CHINA UNIV OF SCI & TECH
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