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Method for directly preparing low-carbon alcohol and co-producing gasoline through CO2 hydrogenation

A low-carbon alcohol, direct technology, applied in the direction of chemical instruments and methods, preparation of hydroxyl compounds, organic compounds, etc., can solve the problem of low activity of low-carbon alcohols, achieve high conversion rate of CO2, novel reaction process, combination method simple effect

Inactive Publication Date: 2021-03-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overall, the current CO 2 The activity of low-carbon alcohols in the research reports of hydrogenation to prepare low-carbon alcohols is still low, so the development of cheap high-activity catalysts and the development of CO 2 A new method for the direct preparation of low-carbon alcohols by hydrogenation is extremely challenging

Method used

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  • Method for directly preparing low-carbon alcohol and co-producing gasoline through CO2 hydrogenation
  • Method for directly preparing low-carbon alcohol and co-producing gasoline through CO2 hydrogenation
  • Method for directly preparing low-carbon alcohol and co-producing gasoline through CO2 hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0027] Fixed K accounts for CuO-MgO-ZnO-Fe 2 o 3 3% of the total mass, changing the Mg / Zn molar ratio, preparing three catalysts K 2 O-CuO(1)-MgO(2)-Fe 2 o 3 (1), K 2 O-CuO(1)-MgO(1.8)-ZnO(0.2)-Fe 2 o 3 (1), K 2 O-CuO(1)-MgO(1.5)-ZnO(0.5)-Fe 2 o 3 (1), brackets are molar ratios, and its catalytic test performance is as shown in Table 1, corresponding to Examples 1-3 respectively.

[0028] Catalytic test conditions: take 0.5g of catalyst and 1.0g of quartz sand, mix the catalyst in H2 / Ar atmosphere at 350°C for 2 hours, then cooled to 320°C, filled with 5MPa CO 2 / H 2 Mixed gas, and activated at a gas flow rate of 50mL / min for 3h, then at 320°C, 5MPa, 6000mL / g cat Start CO under the condition of / h 2 hydrogenation reaction.

[0029] The catalytic test performance data of table 1 embodiment 1-3

[0030]

[0031] As can be seen from the data in Table 1, when only containing Mg and not containing Zn, the gasoline space-time yield is higher, but the low-carbon alc...

Embodiment 4-7

[0033] Fixed CuO(1)-MgO(1.5)-ZnO(0.5)-Fe 2 o 3 (1), change K to account for CuO(1)-MgO(1.5)-ZnO(0.5)-Fe 2 o 3 The mass percentage of (1), the preparation K content is respectively four catalysts of 0.1%, 1.4%, 4.6%, 17.6%, and its catalytic test performance is as shown in Table 2, respectively corresponds to example 4-7. Catalytic test conditions: take 0.5g of catalyst and 1.0g of quartz sand, mix the catalyst in H 2 / Ar atmosphere at 350°C for 2 hours, then cooled to 320°C, filled with 5MPa CO 2 / H 2 Mixed gas, and activated at a gas flow rate of 50mL / min for 3h, then at 320°C, 5MPa, 6000mL / g cat Start CO under the condition of / h 2 hydrogenation reaction.

[0034] Table 2 embodiment 4-7 catalytic test performance data

[0035]

[0036] As can be seen from the data in Table 2, when the K content was 1.4% and 4.6% respectively, the yields of low-carbon alcohol and gasoline were good, and when the K content was too low, the yield of low-carbon alcohol decreased signi...

Embodiment 8

[0038] Take 0.5g CuO-ZnO-Al 2 o 3 The catalyst is mixed with 1.0g of quartz sand, and the catalyst is 2 / Ar atmosphere at 350°C for 2 hours, then cooled to 320°C, filled with 5MPa CO 2 / H 2 Mixed gas, and activated at a gas flow rate of 50mL / min for 3h, then at 320°C, 5MPa, 6000mL / g cat Start CO under the condition of / h 2 hydrogenation reaction. The product was detected by gas chromatography, and the specific catalytic performance is shown in Table 1.

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a method for directly preparing low-carbon alcohol and co-producing gasoline by CO2 hydrogenation, which comprises the following steps: (1) reducing a catalyst for a certain time at a certain temperature in an atmosphere containing H2, and activating for a certain time at a certain pressure and a certain temperature in an atmosphere containing CO2 / H2 to obtain a pretreated catalyst; (2) applying the pretreated catalyst to catalytic reaction to prepare low-carbon alcohol and co-produce gasoline; wherein the catalyst in the step (1) comprises K2O-CuO-MgO-ZnO-Fe2O3. According to the method, the reaction steps are remarkably shortened, and the catalytic efficiency is improved; the one-way CO2 conversion rateis high (greater than 40%); the space-time yield of the low-carbon alcohol is as high as 114.3 mg / gcat / h, and gasoline can be co-produced; the catalyst combination mode is simple, and industrial production is easy.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a CO 2 A method for directly preparing low-carbon alcohol co-production gasoline by hydrogenation. Background technique [0002] Extensive use of fossil fuels has resulted in a large amount of greenhouse gas CO 2 emissions from CO 2 Environmental problems are becoming increasingly prominent. At the same time, as an important carbon resource, the CO 2 Transformation into high value-added chemicals has important application prospects and is also an important way for sustainable development. Low-carbon mixed alcohols (referred to as low-carbon alcohols) have a high octane number and can be used as clean fuels, as well as gasoline additives, such as ethanol gasoline that is being vigorously promoted. Low-carbon alcohols are also good solvents and industrial raw materials, and are widely used in various chemical industries. At present, low-carbon alcohols in industry mainly co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00B01J23/72B01J23/80C07C29/156C07C31/02
CPCC10G2/50C07C29/156B01J23/72B01J23/80C10G2400/02B01J35/19C07C31/02
Inventor 洪昕林许狄刘国亮
Owner WUHAN UNIV
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