For efficient catalytic conversion of co 2 The preparation method of the microbial coupled catalytic system
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A catalytic system and catalytic conversion technology, applied in the methods of using microorganisms, catalyst activation/preparation, preparation of organic compounds, etc., can solve the problems of inability to meet the requirements of industrialization, slow speed, etc., to relieve environmental pressure, and efficient catalytic conversion. Effect
Active Publication Date: 2021-07-23
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
However, existing microorganisms catalyze the conversion of CO 2 The speed is slow and cannot meet the requirements of industrialization
Method used
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Embodiment 1
[0063] A high-efficiency catalytic conversion of CO 2 The preparation method of the microbial coupling catalytic system comprises the steps:
[0064] 1) ferric oxide was dried at 120°C for 12 hours;
[0065] 2) dissolving the auxiliary salt sodium nitrate in the solvent methanol to obtain a sodium nitrate methanol solution;
[0066] 3) Sodium nitrate methanol solution was impregnated on the dried ferric oxide powder, stirred evenly, and dried at 120° C. for 12 hours to obtain a catalyst;
[0067] 4) The catalyst is compressed at 10MPa, and then granulated to 20-40 mesh to obtain the catalyst;
[0068] 5) Load 3.0g of catalyst, first use pure H 2 Carry out reduction, wherein the specific reduction conditions are 350°C and the gas velocity is 4500h -1 (V / V), reduction time 10h, after reduction finishes, catalyst is lowered room temperature with nitrogen;
[0069] 6) Grinding the reduced catalyst to 100 mesh and uniformly mixing with methanogenic microorganisms to obtain a c...
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 reducing gas is pure CO gas. The selectivity results are shown in Table 2 below.
[0075] Table 2: Catalyst reaction results
[0076] Initial amount / mL Final volume / mL Consumption(mL) / Output(mL) Raw material CO 2 amount
Embodiment 3
[0078] Repeat embodiment 1, its difference is only: in step S12, auxiliary agent salt is lithium nitrate, and solvent is acetone; In step 5), described reducing 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 volume / mL Consumption(mL) / Output(mL) Raw material CO 2 amount
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Abstract
The invention discloses a kind of high-efficiency catalytic conversion of CO 2 The preparation method of the microbial coupling catalytic system comprises the following steps: drying the precursor of the iron-based active metal catalyst to remove water to obtain a solid A; dissolving the auxiliary salt in a solvent to obtain a solution B; immersing the solution B into the solid A The powder is stirred and dried to evaporate water to obtain solid C; the solid C is compressed to 20-40 mesh, and activated to obtain solid D; the solid D is ground to obtain catalyst E; the catalyst E and the domesticated anaerobic microorganism are Under anaerobic conditions, mechanical and physical mixing in a shaker is used to obtain efficient catalytic conversion of CO 2 microbial coupled catalytic system. The catalyst system obtained by coupling anaerobic microorganisms and iron-based catalysts in the preparation method of the invention can accelerate the conversion of inert CO by anaerobic microorganisms. 2 Efficient catalytic conversion into high value-added products such as methanol, formic acid or acetic acid, so as to achieve CO 2 efficient utilization of high value-added products.
Description
technical field [0001] The invention relates to a catalyst preparation method and its application. More specifically, it relates to a method for efficient catalytic conversion of CO 2 The preparation method of the microbial coupling catalytic system. Background technique [0002] The excessive use of fossil fuels has led to a sharp decline in the amount of fossil fuels and a sharp increase in carbon dioxide emissions, which has led to a series of problems such as energy crises, global warming, and ocean acidification. Find renewable energy sources to reduce CO 2 Issues such as emissions need to be resolved urgently. Although CO 2 Leading to a series of environmental problems, we found that CO 2 It can be used as a carbon source for the synthesis of chemical raw material intermediates. In recent years, CO 2 Catalytic hydrogenation of , which has attracted great attention, not only can reduce CO 2 Greenhouse gas emissions to reduce environmental pressure, and high-valu...
Claims
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