Biological catalysis method for preparing methanol from carbon dioxide

A technology of carbon dioxide and biocatalysis, applied in the direction of fermentation, etc., can solve the problems of low conversion rate and high energy consumption

Inactive Publication Date: 2005-02-16
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the conditions required by these methods are often very harsh. For example, the heterogeneous catalysis method requires high temperature and high pressure, while the latter two methods require external electrical energy or light energy, high energy consumption and low conversion rate.

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  • Biological catalysis method for preparing methanol from carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Methane-oxidizing bacteria Methylosimus trichosporium IMV 3011 was fermented and harvested by centrifugation after fermentation. The harvested cells were added to a 100-ml Erlenmeyer flask together with 20 ml of the reaction solution containing the following components. The cells of the methane-oxidizing bacteria Methylosimus trichosporium IMV 3011 The concentration in the reaction solution is 2-10 mg / ml:

[0019] Disodium hydrogen phosphate at a concentration of 50-100 mmol / l,

[0020] Sodium dihydrogen phosphate at a concentration of 50-100 mmol / l,

[0021] Magnesium chloride at a concentration of 5 mmol / L,

[0022] pH=6.5-6.9.

[0023] One of the bottles was sealed and 80 milliliters of air was pumped out, and 80 milliliters of carbon dioxide was added as a control; the other bottle was sealed and 80 milliliters of air was pumped out, and 80 milliliters of nitrogen was added; 32 degrees Celsius, 150 rpm shaking table reaction; detection and quantitative analysis of...

Embodiment 2

[0031] Others are the same as in Example 1, the content of carbon dioxide in the reaction gas is 100%. 32 degrees Celsius, 150 rpm shaker reaction, each batch reaction is 5-7 hours, after the reaction is completed, the product is centrifuged, and the cells are recovered to proceed to the next batch of reaction. Take 0.5 ml of cell liquid from the sealed reaction bottle every hour, centrifuge to obtain supernatant, detect the product methanol with gas chromatography, and then compare its production trend. The results are shown in Table 2:

[0032] Batch / 5-7 hours Methanol output

[0033] 1 3.6 (micromole)

[0034] 2 4.4 (micromole)

[0035] 3 4.2 (micromole)

[0036] 4 3.3 (micromole)

[0037] 5 3.1 (micromole)

[0038] By comparison, it was found that the catalytic activity of methane-oxidizing bacterial cells did not decrease significantly after repeated experiments.

Embodiment 3

[0040] Others are the same as in Example 1, the concentration of carbon dioxide in the reaction gas is changed to 40%. Change the cell concentration and react on a shaker at 32 degrees Celsius and 150 rpm for 5-7 hours. After the reaction was completed, the product was separated by centrifugation, and the product methanol was detected by gas chromatography. The results are shown in Table 3:

[0041] Cell concentration Methanol production

[0042] 2 mg / ml 2.8 (micromole)

[0043] 4 mg / ml 3.9 (micromole)

[0044] 6 mg / ml 4.5 (micromole)

[0045] 8 mg / ml 4.1 (micromole)

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Abstract

The invention publishes a kind of biology method to prepare methanol using carbon dioxide catalysis. Fist, use methane to oxidize Methylosimus trichosporium IMV as the catalyst. Second, add carbon dioxide or the mixture of carbon dioxide and air as reaction substrate. In this method, the outcome methanol can be gotten and the transformation from carbon dioxide to methanol.

Description

technical field [0001] The invention relates to a biocatalytic method for preparing methanol by using methane oxidation bacteria to catalyze carbon dioxide reduction. Background technique [0002] Carbon dioxide is the main component of greenhouse gases, and it is inexhaustible. Converting carbon dioxide into methanol has great research significance and application value. It can not only solve the problem of climate warming caused by the greenhouse gas carbon dioxide, but also provide people with important chemical raw materials and clean fuel energy - methanol, and solve the problem of people's energy crisis. There are several representative chemical methods such as heterogeneous catalytic method, electrocatalytic method and photocatalytic method for the conversion of carbon dioxide to methanol. However, the conditions required by these methods are often very harsh. For example, the heterogeneous catalysis method requires high temperature and high pressure, while the latt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/04
Inventor 辛嘉英崔俊儒夏春谷李树本
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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