Copper-iron based catalyst and application thereof in preparing low mixed alcohols by catalyzing synthesis gas

A low-carbon mixed alcohol and catalyst technology, which is applied in the preparation of hydroxyl compounds, organic compounds, physical/chemical process catalysts, etc., can solve the problem of insufficient activity, selectivity, stability and economy, poor catalyst stability, and product alcohol Low selectivity and other issues, to achieve the effects of increased selectivity, space-time yield, easy operation, and strong interaction

Inactive Publication Date: 2013-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the beginning of the 20th century, researchers have developed a variety of different low-carbon alcohol catalyst systems, but overall there are deficiencies in activity, selectivity, stability, and economy. The development of catalysts with high activity and high selectivity is still a research topic. difficulties and key
However, at present, this type of catalyst has problems such as easy deactivation of the catalyst, low selectivity of alcohol in the product, and poor stability of the catalyst.

Method used

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  • Copper-iron based catalyst and application thereof in preparing low mixed alcohols by catalyzing synthesis gas
  • Copper-iron based catalyst and application thereof in preparing low mixed alcohols by catalyzing synthesis gas
  • Copper-iron based catalyst and application thereof in preparing low mixed alcohols by catalyzing synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Weigh Cu(NO 3 ) 2 ·3H 2 O4g, Mg(NO 3 ) 2 ·6H 2 O12.8g, Fe(NO 3 ) 3 9H 2 O13.4g was dissolved in 100ml deionized water by stirring to make it completely dissolved; respectively weighed NaOH6.4g, NaOH 2 CO 3 7.1g in 100ml deionized water, stir to dissolve completely;

[0025] 2. Add the two solutions obtained in step 1 into the rotating liquid film reactor at a certain flow rate to nucleate rapidly, and circulate for 2 minutes, then place the mixed solution in a hydrothermal kettle, and crystallize at a temperature of 100°C for 48 hours. Then wash the filtrate with deionized water to make the pH value of the washing water less than 8, and then dry at 60° C. for 24 hours to obtain the copper-magnesium-iron hydrotalcite precursor.

[0026] 3. Put the copper-magnesium-iron hydrotalcite precursor prepared in step 2 in a muffle furnace, raise the temperature to 500°C at 2°C / min, keep it warm for 6h, and cool down to room temperature naturally; then perform reducti...

Embodiment 2

[0030] 1. Weigh Cu(NO 3 ) 2 ·3H 2 O9.1g, Mg(NO 3 ) 2 ·6H 2 O9.6g, Fe(NO 3 ) 3 9H 2 O10.1g in 100ml deionized water, stirred to make it completely dissolved; Weigh respectively NaOH6.4g, NaOH 2 CO 3 5.3g in 100ml deionized water, stir to dissolve completely;

[0031] 2. Add the two solutions obtained in step 1 into the rotating liquid film reactor at a certain flow rate to quickly nucleate, and circulate for 2 minutes, then place the mixed solution in a hydrothermal kettle, and crystallize at a temperature of 100°C for 48 hours. Then wash the filtrate with deionized water to make the pH value of the washing water less than 8, and then dry at 60° C. for 24 hours to obtain the copper-magnesium-iron hydrotalcite precursor.

[0032] 3. Place the copper-magnesium-iron hydrotalcite precursor prepared in step 2 in a muffle furnace, raise the temperature to 500°C at 2°C / min, keep it warm for 6h, and cool down to room temperature naturally; then perform reduction treatment, th...

Embodiment 3

[0036] 1. Weigh Cu(NO 3 ) 2 ·3H 2 O12.1g, Mg(NO 3 ) 2 ·6H 2 O7.7g, Fe(NO 3 ) 3 9H 2 O8.1g in 100ml deionized water, stirred to make it completely dissolved; Weigh respectively NaOH6.4g, NaOH 2 CO 3 4.2g in 100ml deionized water, stir to dissolve completely;

[0037] 2. Add the two solutions obtained in step 1 into the rotary liquid film reactor to nucleate at the same time, and after circulating for 2 minutes, put the mixed solution in a hydrothermal kettle and crystallize at 100°C for 48 hours. Then use deionized The filtrate was washed with water to make the pH value of the washing water less than 8, and then dried at 60° C. for 24 hours to obtain a copper-magnesium-iron hydrotalcite precursor.

[0038] 3. Place the copper-magnesium-iron hydrotalcite precursor prepared in step 2 in a muffle furnace, raise the temperature to 500°C at 2°C / min, keep it warm for 6h, and cool down to room temperature naturally; then perform reduction treatment, the reduction condition i...

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Abstract

The invention discloses a copper-iron based catalyst in the technical field of catalyst preparation and application thereof in preparing low mixed alcohols by catalyzing synthesis gas. According to the invention, a copper-magnesium-iron hydrotalcite precursor is prepared by a nucleation-crystallization isolating method, and then the copper-magnesium-iron hydrotalcite precursor is roasted and then subjected to reduction treatment to obtain the copper-iron based catalyst of highly dispersed nanoparticles. The catalyst has the characteristics that the catalytic active ingredients are highly dispersed, the catalytic active ingredients have strong interaction with one another, and are high in stability, and as a result, the activity and selectivity of the catalyst are improved. After the copper-iron based catalyst is applied to preparing low mixed alcohols from the synthesis gas, the CO conversion rate is high, and the selectivity and space time yield of the low mixed alcohols are also improved; besides, the conversion rate of CO for synthesizing low mixed alcohols through CO hydrogenation is 56.89% and the selectivity of alcohols is 49.07%.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a copper-iron-based catalyst and its application in catalyzing synthesis gas to prepare low-carbon mixed alcohols. Background technique [0002] Energy development and environmental protection have become two strategic themes for the survival and development of human society. As the world's largest coal-producing country, my country's energy structure with rich coal and little oil is more obvious. From the perspective of resource utilization and environmental protection, efficient conversion of clean coal and biomass energy to prepare "green fuel" low-carbon mixed alcohol has important strategic significance and application prospects. Low-carbon alcohol, or low-carbon mixed alcohol, generally refers to C 1 -C 5 Alcohol mixture. Low-carbon alcohol has a high octane number, and its explosion-proof and shock-resistant properties are superior. It has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B82Y40/00C07C29/156C07C31/02
Inventor 卫敏高娃赵宇飞李长明段雪
Owner BEIJING UNIV OF CHEM TECH
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