Catalyst used for CO2 hydrogenation to directly produce gasoline and preparation method and application of the catalyst

A carbon dioxide and catalyst technology, which is applied in the field of catalysts and preparations for directly producing gasoline by hydrogenation of carbon dioxide, can solve the problems of complex phase structure, low Fischer-Tropsch activity and high selectivity of iron-based catalysts, and achieve high target product selectivity, High C5+ selectivity and high CO2 conversion effect

Pending Publication Date: 2018-12-18
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron-based catalysts have a complex phase structure, short lifetime, and low Fischer-Tropsch activity, resulting in high selectivity of by-product CO. In addition, there are still many by-product methane generated, and methane selectivity is usually higher than 20%.

Method used

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  • Catalyst used for CO2 hydrogenation to directly produce gasoline and preparation method and application of the catalyst
  • Catalyst used for CO2 hydrogenation to directly produce gasoline and preparation method and application of the catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] According to Zn / Zr=1:8 (molar ratio), 1.98g Zn(NO 3 ) 2 ·6H 2 O and 22.80g Zr(NO 3 ) 4 ·5H 2 O was added to 300mL deionized water to prepare a mixed metal salt solution with a concentration of 0.2mol / L, and 14.34g NaOH was added to 150mL ethanol to prepare a precipitant solution. The precipitant solution was added dropwise to the metal salt solution at a temperature of 10°C. After the precipitation reaction, the obtained product was aged at 40°C for 5 hours, and then the obtained precipitate was washed several times with deionized water. Then dry at 60°C for 24h, and then bake at 250°C for 12h to get ZnO-ZrO 2 metal oxide carrier. ZnO-ZrO 2 Grind into powder in an agate mortar for later use, according to the composition of the metal oxide catalyst In 2 o 3 Loading capacity is 10wt%, weighs 3.06g of In(NO 3 ) 3 .4.5H 2 O was dissolved in deionized water to prepare an impregnating solution, and impregnated the above 10g ZnO-ZrO 2 The powder is dried at 60°C f...

Embodiment 2

[0050] According to Zn / Zr=1:5 (molar ratio), 2.98g Zn(NO 3 ) 2 ·6H 2 O and 21.50g Zr(NO 3 ) 4 ·5H 2 O was added to 45mL deionized water and 15mL ethanol to prepare a mixed metal salt solution with a concentration of 1.0mol / L, and 23.04g (NH 4 ) 2 CO 3 Add to 150mL ethanol to prepare a precipitant solution. The precipitant solution was added dropwise to the metal salt solution at a temperature of 15° C. After the precipitation reaction, the obtained product was aged at 60° C. for 0.1 h, and then the obtained precipitate was washed several times with deionized water. Then dry at 60°C for 16h, and then bake at 250°C for 8h to get ZnO-ZrO 2 metal oxide carrier. ZnO-ZrO 2 Grind into powder in an agate mortar for later use, according to the composition of the metal oxide catalyst In 2 o 3 Loading capacity is 20wt%, weighs 6.88g of In(NO 3 ) 3 .4.5H 2 O was dissolved in deionized water to prepare an impregnating solution, and impregnated the above 10g ZnO-ZrO 2 powder...

Embodiment 3

[0053] According to Zn / Zr=1:4 (molar ratio), 3.60g Zn(NO 3 ) 2 ·6H 2 O and 20.80g Zr(NO 3 ) 4 ·5H 2 O was added to 112.5mL deionized water and 37.5mL ethanol to prepare a mixed metal salt solution with a concentration of 0.4mol / L, and 29.19g ammonia water (NH 3 The concentration is 28wt%) joins in the 150mL ethanol and prepares the precipitating agent solution. The precipitant solution was added dropwise to the metal salt solution at a temperature of 15° C. After the precipitation reaction, the obtained product was aged at 60° C. for 0.5 h, and then the obtained precipitate was washed several times with deionized water. Then dry at 70°C for 12h, and then bake at 250°C for 6h to get ZnO-ZrO 2 metal oxide carrier. ZnO-ZrO 2 Grind into powder in an agate mortar for later use, according to the composition of the metal oxide catalyst In 2 o 3 Loading capacity is 20wt%, weighs 6.88g of In(NO 3 ) 3 .4.5H 2 O was dissolved in deionized water to prepare an impregnating sol...

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Abstract

The invention discloses a catalyst used for CO2 hydrogenation to directly produce gasoline and a preparation method and an application of the catalyst. The catalyst includes a nano metal oxide and a ZSM-5 molecular sieve, wherein the nano metal oxide accounts for 20-80 mass% of the composite catalyst while the ZSM-5 molecular sieve accounts for 20-80 mass% of same. The nano metal oxide includes In2O3, ZnO and ZrO2. The catalyst has excellent catalytic performance and high CO2 conversion rate and is high in selectivity on hydrocarbon compounds in a target product gasoline, wherein C5+ in the hydrocarbon products can reach up to more than 80.2%, while the selectivity on byproducts, CH4 and CO, is low. The catalyst has good reaction stability and is low in cost, simple in preparation and easyto produce in industrialization.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, the field of greenhouse gas emission reduction and carbon dioxide resource utilization, in particular to a catalyst for direct production of gasoline by carbon dioxide hydrogenation and its preparation method and application. Background technique [0002] carbon dioxide (CO 2 ) as a "carbon resource" that exists in large quantities in nature, if the hydrogen produced by electrolyzing water with the help of alternative energy sources (solar energy, wind energy, nuclear energy, etc.) can be converted into high value-added chemicals (methanol, formic acid and dimethyl ether etc.) or liquid fuels (gasoline, aviation kerosene, etc.), etc., will help to simultaneously solve the environmental problems caused by the increase in the concentration of carbon dioxide in the atmosphere, the excessive dependence on fossil fuels and the storage of renewable energy. Among the many products, gasoline ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J35/02C10G2/00
CPCB01J29/405B01J35/023B01J35/026C10G2/50
Inventor 高鹏崔勖杨海艳党闪闪王慧魏伟孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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