Preparation method of microbial coupling catalytic system for efficient catalytic conversion of CO2
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A catalytic conversion and catalytic system technology, applied in the direction of using microorganisms, catalyst activation/preparation, preparation of organic compounds, etc., can solve the problems of slow speed and inability to meet the requirements of industrialization, and achieve the effect of efficient catalytic conversion of CO2
Active Publication Date: 2020-07-10
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
However, existing microorganisms catalyze the conversion of CO 2 Th
Method used
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Embodiment 1
[0063] One for high-efficiency catalytic conversion of CO 2 The preparation method of the microbial coupling catalytic system includes the following steps:
[0064] 1) The iron trioxide is dried at 120°C for 12 hours;
[0065] 2) Dissolve the auxiliary salt sodium nitrate in solvent methanol to obtain sodium nitrate methanol solution;
[0066] 3) Immerse the sodium nitrate methanol solution on the dried ferric oxide powder, stir evenly, and dry at 120°C for 12 hours to obtain the catalyst;
[0067] 4) The catalyst is tableted under 10MPa, and then granulated to 20-40 mesh to obtain the catalyst;
[0068] 5) Fill 3.0g of catalyst, first use pure H 2 Carry out reduction, where the specific reduction conditions are 350℃ and the gas velocity is 4500h -1 (V / V), the reduction time is 10h, after the reduction, the catalyst is used to lower the room temperature with nitrogen;
[0069] 6) Grind the reduced catalyst to 100 mesh and mix it with methanogenic microorganisms to obtain a coupled cataly...
Embodiment 2
[0074] Repeat Example 1, the only difference is: in step S12, the auxiliary salt is potassium nitrate and the solvent is ethanol; in step 5), the gas for reduction is pure CO gas. The selectivity results are shown in Table 2 below.
[0075] Table 2: Catalyst reaction results
[0076] Initial amount / mL Final state volume / mL Consumption (mL) / Output (mL) Raw material CO 2 Amount of
Embodiment 3
[0078] Repeat Example 1, the only difference is: in step S12, the auxiliary salt is lithium nitrate, and the solvent is acetone; in step 5), the reduction gas is synthesis gas (H 2 / CO). The selectivity results are shown in Table 3 below.
[0079] Table 3: Catalyst reaction results
[0080] Initial amount / mL Final state volume / mL Consumption (mL) / Output (mL) Raw material CO 2 Amount of
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Abstract
The invention discloses a preparation method of a microbial coupling catalytic system for efficient catalytic conversion of CO2, which comprises the following steps: drying and dewatering a precursorof an iron-based active metal catalyst to obtain a solid A; dissolving an auxiliary agent salt into a solvent to obtain a solution B; dipping the solution B into the solid A powder, stirring, and drying to evaporate water to obtain a solid C; tabletting the solid C to 20-40 meshes, and activating to obtain a solid D; grinding the solid D to obtain a catalyst E; and mechanically and physically mixing the catalyst E and the domesticated anaerobic microorganisms by using a shaking table under an anaerobic condition to obtain the microorganism coupling catalysis system for efficiently catalyzing and converting CO2. According to the preparation method, anaerobic microorganisms and the iron-based catalyst are coupled to obtain a catalytic system, and the anaerobic microorganisms can be accelerated to efficiently catalyze and convert inert CO2 into high-added-value products such as methanol, formic acid or acetic acid, so that the efficient utilization of CO2 is realized, and the efficient output of the high-added-value products is realized.
Description
Technical field [0001] The invention relates to a catalyst preparation method and its application. More specifically, it relates to an efficient catalytic conversion of CO 2 The preparation method of the microbial coupling catalytic system. Background technique [0002] Excessive use of fossil fuels has led to a sharp decline in the content of fossil fuels and a sharp increase in carbon dioxide emissions, which has led to a series of problems, such as energy crisis, global warming and ocean acidification. Looking for renewable energy resources to reduce CO 2 Issues such as the emission of water are urgently to be solved. Although CO 2 Led to a series of environmental problems, we found that CO 2 It can be used as a carbon source for synthetic chemical raw material intermediates. In recent years, CO 2 Catalytic hydrogenation has attracted people’s attention. It can not only reduce CO 2 Greenhouse gas emissions to reduce environmental pressure, and high-value chemical substances ...
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