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Carbon dioxide hydrogenation catalyst and preparation method and application thereof

A carbon dioxide and catalyst technology, applied in the field of catalytic conversion of carbon dioxide hydrogenation, can solve problems such as unsatisfactory conversion rate, achieve excellent catalytic performance, change catalytic performance, and good methanol yield

Pending Publication Date: 2021-07-23
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, Cu-Zn materials modified by transition metals have also been extensively studied, such as CuZnGa-hydrotalcite in CO 2 At a conversion rate of 20%, a methanol yield of 0.59kg was achieved CH3OH / L cat h, but methanol selectivity is only about 50% (ACS Catal.2018, 8, 4390-4401)
And the Pd / CeO supported by noble metal 2 The methanol selectivity of the catalyst reaches 92%, but the CO 2 The conversion rate is not ideal (J.Catal.,1994,150,217–220)

Method used

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  • Carbon dioxide hydrogenation catalyst and preparation method and application thereof
  • Carbon dioxide hydrogenation catalyst and preparation method and application thereof
  • Carbon dioxide hydrogenation catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Pd-doped ZnZr oxide solid solution (Pd-Zn x Zr 1-x O): Zinc nitrate and zirconium nitrate were dissolved in 240 mL of deionized water at a molar ratio of 0.13:0.87 to form salt solution A (the quality of the two nitrates added was 1.313 g and 12.685 g respectively), stirred at 30° C. for 1 h, Then add palladium nitrate of corresponding quality containing 0.004g Pd in ​​the salt solution A and stir to dissolve. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized wate...

Embodiment 2

[0042] Pd-doped ZnZr oxide solid solution (Pd-Zn x Zr 1-x O): Zinc nitrate and zirconium nitrate were dissolved in 240 mL of deionized water at a molar ratio of 0.13:0.87 to form salt solution A (the quality of the two nitrates added was 1.313 g and 12.685 g respectively), stirred at 30° C. for 1 h, Then add palladium nitrate of corresponding quality containing 0.008g Pd in ​​the salt solution A and stir to dissolve. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized wate...

Embodiment 3

[0046] Pd-doped ZnZr oxide solid solution (Pd-Zn x Zr 1-x O): Zinc nitrate and zirconium nitrate were dissolved in 240 mL of deionized water at a molar ratio of 0.13:0.87 to form salt solution A (the quality of the two nitrates added was 1.313 g and 12.685 g respectively), stirred at 30° C. for 1 h, Then add palladium nitrate of corresponding quality containing 0.020g Pd in ​​the salt solution A and stir to dissolve. Then 6.660g of ammonium carbonate was dissolved in 220mL of deionized water and fully stirred and dissolved to form alkaline solution B. Transfer solution A to a round-bottomed flask and preheat it in an oil bath at 70°C, then add solution B to the round-bottomed flask at a rate of 3ml / min with a peristaltic pump under nitrogen purging, and then continue stirring at 70°C 3h. The resulting precipitate was cooled to room temperature, and the precipitate and the solution were separated under high-speed centrifugation. The precipitate was washed with deionized wate...

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Abstract

The invention provides a carbon dioxide hydrogenation catalyst and a preparation method and application thereof, the catalyst is a Pd-doped metal oxide solid solution, the general formula of the metal oxide solid solution is ZnxZr1-xO, and x is 0.13-0.5. The catalyst has the characteristics of high activity, high methanol selectivity and long-time stable operation at relatively high temperature and pressure, and provides a wide prospect for subsequent industrial application and a subsequent conversion process of coupled methanol.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide hydrogenation catalytic conversion, in particular to a catalyst for producing methanol by hydrogenation of carbon dioxide, a preparation method and application thereof. Background technique [0002] Methanol is an important chemical intermediate raw material that can be used as a fuel for internal combustion engines and fuel cells. With the gradual reduction of non-renewable energy sources, methanol can be used as an alternative chemical raw material to synthesize a variety of chemicals and gasoline and other fuels. In recent years, with the development of technologies such as molecular sieve catalysts, methanol-to-olefins (MTO), and methanol-to-aromatics (MTG), the demand for fuels obtained from methanol has grown rapidly in the international market (Johnson, D.Global Methanol Demand Growth; IHS Inc. , 2016). Traditionally, methanol is produced in the industry through the conversion of sy...

Claims

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Application Information

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IPC IPC(8): B01J23/60C07C29/157C07C31/04
CPCB01J23/60B01J23/002C07C29/157C07C31/04Y02P20/52
Inventor 王慧黄超杰吴兆萱夏林孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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