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Supported catalyst and preparation method thereof

A supported catalyst and catalyst technology, used in the chemical industry to achieve the effects of good stability, high CO2 conversion, and high α linear olefin selectivity

Pending Publication Date: 2021-07-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Since the industrial revolution in the 18th century, the use of fossil fuels such as coal, oil, and natural gas has promoted the development of human society and economy, but it has inevitably emitted huge amounts of CO 2 , leading to increasingly serious environmental problems such as global warming

Method used

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  • Supported catalyst and preparation method thereof
  • Supported catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0092] Catalyst preparation: using the second method

[0093] Step 1. Weigh 5.64g Zn(CHCOO) 2 .2H 2 O and 10.59g Zr(NO 3 ) 4 .5H 2 O in a beaker, add deionized water to prepare a mixed solution of metal cations (0.25mol.L -1 ); as required for complete precipitation of metal cations (NH 4 ) 2 CO 3 The amount, weigh 7.43g (NH 4 ) 2 CO 3 Prepared to 1.2mol.L -1 solution, under stirring at room temperature, drop the ammonium carbonate solution into the above mixed solution; after the precipitation is complete, let it stand for 3 hours, wash, centrifuge, dry at 120°C, and roast at 500°C for 4 hours to obtain ZnO 40 (ZrO 2 ) 60 carrier.

[0094] Step 2, using a wet impregnation method to disperse the active phase of the catalyst on the carrier. First, weigh 2 g of the carrier prepared in step 1 and disperse it into deionized water, and weigh 4.82 g of Fe(NO 3 ) 3 .9H 2 O was added to the above suspension, evaporated in a water bath at 60°C under stirring until vis...

example 2

[0098] Catalyst preparation: using the second method

[0099] Step 1. Weigh 12.35g Zn(CHCOO) 2 .2H 2 O and 10.73g Zr(NO 3 ) 4 .5H 2 O in a beaker, add deionized water to prepare a mixed solution of metal cations (0.25mol.L -1 ); as required for complete precipitation of metal cations (NH 4 ) 2 CO 3 The amount, weigh 10.21g (NH 4 ) 2 CO 3 Prepared to 1.2mol.L -1 solution, under stirring at room temperature, drop the ammonium carbonate solution into the above mixed solution; after the precipitation is complete, let it stand for 3 hours, wash, centrifuge, dry at 120°C, and roast at 500°C for 4 hours to obtain ZnO 60 (ZrO 2 ) 40 carrier.

[0100] Step 2, using a wet impregnation method to disperse the active phase of the catalyst on the carrier. First, weigh 3 g of the carrier prepared in step 1 and disperse it into deionized water, and weigh 7.25 g of Fe(NO 3 ) 3 .9H 2 O was added to the above suspension, evaporated in a water bath at 60°C under stirring until v...

example 3

[0104] Catalyst preparation: using the first method

[0105] Step 1: Take by weighing 14.56g Fe(NO 3 ) 3 .9H 2 O, 5.38g Zn(CH 3 COO) 2 .2H 2 O and 9.37g Zr(NO 3 ) 4 .5H 2 O in a beaker, add deionized water to prepare a mixed solution of metal cations (0.25mol.L -1 ); as required for complete precipitation of metal cations (NH 4 ) 2 CO 3 The amount, weigh 11.79g (NH 4 ) 2 CO 3 Prepared to 1.2mol.L -1 solution, under stirring at room temperature, drop the ammonium carbonate solution into the above mixed solution; after the precipitation is complete, let it stand for 3 hours, wash, centrifuge, dry at 120°C, and roast at 400°C for 4 hours to obtain Fe 30 ZnO 30 (ZrO 2 ) 40 catalyst.

[0106] Step 2, using the equal volume impregnation method, according to the amount of catalyst mass 1wt%, Na 2 CO 3 Immerse it on the catalyst prepared in step 1, let it stand for 3 hours, and dry it at 120°C. Catalyst Fe 30 ZnO 30 (ZrO 2 ) 40 Na 1 .

[0107] Catalyst perf...

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Abstract

The invention provides a supported catalyst and a preparation method thereof, the supported catalyst comprises an active phase and a carrier, the active phase is Fe; the carrier is one or more of Al2O3, ZrO2 and CeO2. The preparation method has the advantages of easy industrialization of the preparation process, high CO2 conversion rate, high alpha straight-chain olefin selectivity and good stability.

Description

technical field [0001] The application relates to the field of chemical technology, more specifically, to a supported catalyst and its preparation method. Background technique [0002] Since the industrial revolution in the 18th century, the use of fossil fuels such as coal, oil, and natural gas has promoted the development of human society and economy, but it has inevitably emitted huge amounts of CO 2 , leading to increasingly serious environmental problems such as global warming. my country's energy supply mainly depends on coal (accounting for about 70%), oil and natural gas, etc. Currently, CO 2 Emissions account for more than 25% of global emissions, reaching 10 billion tons in 2018. With the sustained and rapid economic development, CO 2 emissions will continue to grow, facing a huge CO 2 pressure to reduce emissions. [0003] At present, scholars at home and abroad have developed some Fischer-Tropsch iron oxide catalysts that can directly realize CO 2 Hydrogena...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/80C07C1/12C07C11/04C07C11/06C07C11/08
CPCB01J23/80B01J23/78B01J23/002C07C1/12B01J2523/00C07C2523/78C07C2523/80B01J2523/27B01J2523/48B01J2523/842B01J2523/31C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 韩一帆涂维峰刘洋洋时彦玲张振洲
Owner ZHENGZHOU UNIV