Carbon nanometer tube copper-base dmethanol synthesis promoting catalyst and its preparing method

A carbon nanotube, methanol synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as complex process flow

Inactive Publication Date: 2002-08-21
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing methanol synthesis process, only a small part (~10%) of the raw material synthesis gas is converted into methanol, and most of the unreacted synthesis gas needs to be separated, and then repeated and repeated cyclic reactions to improve the utilization rate of the raw material synthesis gas , the process and equipment are relatively complex, and additional energy for separation and circulation is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: 17.47 grams of Cu (NO 3 ) 2 ·3H 2 O, 10.75 g Zn(NO 3 ) 2 ·6H 2 O, 4.52 g Al(NO 3 ) 3 9H 2 O (purity are all AR grade) mixed together, add 50mL deionized water to make solution A, another 13.40g AR grade anhydrous Na 2 CO 3 Add 50mL of deionized water to make solution B, transfer the two liquids A and B respectively into a preheated container at a constant temperature of 353K, flow them side by side under stirring conditions, and drop them into a reaction container with 1.16 grams of CNTs and a constant temperature at 353K Carry out co-precipitation reaction in the interior, continue to stir for 5 hours after feeding, stop heating and continue to stir for 3 hours, let it stand and age overnight, feed liquid is through suction filtration, and the obtained precipitate is fully washed through deionized water (washed until it passes through flame Determination of Na in eluent by ion absorption method + ion concentration below 0.1ppm), dried at 393K fo...

Embodiment 2

[0017] Embodiment 2: 17.47 grams of Cu (NO 3 ) 2 ·3H 2 O, 10.75 g Zn(NO 3 ) 2 ·6H 2 O, 4.52 g Al(NO 3 ) 3 9H 2 O (purity are all AR grade) mixed with 50mL deionized water to make solution A, another 13.40 grams of AR grade anhydrous Na 2 CO 3 Add 50mL of deionized water to make solution B, transfer the two liquids A and B respectively into a preheated container at a constant temperature of 353K, flow them side by side under stirring conditions, and drop them into a reaction container with 1.16 grams of CNTs and a constant temperature at 353K Carry out co-precipitation reaction in the interior, continue to stir for 5 hours after feeding, stop heating and continue to stir for 3 hours, let it stand and age overnight, feed liquid is through suction filtration, and the obtained precipitate is fully washed through deionized water (washed until it passes through flame Determination of Na in eluent by ion absorption method + ion concentration below 0.1ppm), dried at 393 K fo...

Embodiment 3

[0018] Embodiment 3: 17.47 grams of Cu (NO 3 ) 2 ·3H 2 O, 10.75 g Zn(NO 3 ) 2 ·6H 2 O, 4.52 g Al(NO 3 ) 3 9H 2 O (purity are all AR grade) mixed with 50mL deionized water to make solution A, another 13.40 grams of AR grade anhydrous Na 2 CO 3 Add 50mL of water to make solution B, transfer the two liquids A and B respectively into a preheated container at a constant temperature of 353K, flow them side by side under stirring conditions, and drop them into a reaction container with 0.93 grams of CNTs and a constant temperature at 353K. Co-precipitation reaction, after feeding, continue to stir for 5 hours, stop heating and continue to stir for 3 hours, then allow it to stand and age overnight, the feed liquid is suction filtered, and the gained precipitation is fully washed with deionized water (washed until it is absorbed by flame ions). method for the detection of Na in the eluent + ion concentration below 0.1ppm), dried at 393K for 4 hours, and burned at 543K for 2.5...

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Abstract

The catalyst consists of Cu, Zn, Al2O3 and carbon nanotubes (CNTs) and has the constituents including Cu 10-55 wt%, Zn 4-30 wt%, Al 0-7.5 wt% and CNTs 5-80 wt%. The CNTs are multilayer wall ones with outer diameter of 10-50 nm, inner diameter of 2-4 nm, carbon content over 99 wt%, graphite carbon content over 80 wt%, and specific surface area of 100-160 sq m/g. The catalyst is prepared through preparing solution A of nitrate in the material metal components; preparing solution B of Na2CO3 in the equivalent concentration; coprecipitating reaction in a reactor with CNTs by dropping solution A and solution B in equal speed at 353K or soaking CNTs in mixed water or ethanol solution of nitrate; drying and burning. The catalyst has high and stable activity, high CO converting rate and high methanol yield.

Description

(1) Technical field [0001] The invention relates to a carbon nanotube-promoted Cu-based methanol synthesis catalyst and a preparation method thereof. (2) Background technology [0002] Methanol is the most widely used C 1 Chemicals. It has been proven that it can be used as a high-octane, low-pollution vehicle fuel, or as a hydrogen fuel carrier for PEM fuel cells. It is also an important basic chemical raw material, and its application prospects are very broad. In the existing methanol synthesis process, only a small part (~10%) of the raw material synthesis gas is converted into methanol, and most of the unreacted synthesis gas needs to be separated, and then repeated and repeated cyclic reactions to improve the utilization rate of the raw material synthesis gas , the process flow and equipment are relatively complicated, and additional energy for separation and circulation is required. Therefore, the development of highly active catalysts for methanol synthesis and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/80
Inventor 张鸿斌董鑫林国栋蔡启瑞
Owner XIAMEN UNIV
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