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Iron-based catalyst with high carbon hydrocarbon selectivity as well as preparation method and application thereof

An iron-based catalyst, a selective technology, applied in catalyst activation/preparation, carbon compound catalysts, catalysts, etc., to achieve the effect of simplifying the preparation process and reducing the cost of catalysts

Inactive Publication Date: 2021-08-31
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon dioxide molecule is very stable, and its activation and selective conversion are extremely challenging problems

Method used

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  • Iron-based catalyst with high carbon hydrocarbon selectivity as well as preparation method and application thereof
  • Iron-based catalyst with high carbon hydrocarbon selectivity as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) First, 34.75 grams of ferric sulfate is placed in a beaker, add 69.5 grams of deionized water, stirred with a magnet for 5 minutes to obtain a ferrous sulfate solution, add 15.75 grams of oxalic acid to the inside, and add 1.41 grams. Sodium tartrate, yellow turbid fluid, fully stirred to dispersed mixed; place the cloudy fluid in the centrifugal cup, centrifuged under 4000 rpm, 5 minute conditions, washed with 75 ml of deionized water, then centrifuged Separated, followed by pressing the supernatant twice; transferring the yellow precipitate after washing into the beaker, dried in an oven at 90 ° C for 12 hours, and fired at 500 ° C for 10 hours to give a brick powder, The powder tablets are formed into particles, which is recorded as a catalyst 1;

[0034] (2) Test of catalyst reaction performance: 1 gram catalyst 1 for fixing bed reactor evaluation, reduction temperature at 300 ° C, CO / N 2After 6 hours at atmospheric pressure reducing = 3, at 235 ℃, 1.6MPa, H 2 / C...

Embodiment 2

[0036] (1) first weighing 34.75 grams of ferrous sulfate placed in a beaker was added 52.5 g of deionized water, stirred with a magnetic ferrous sulfate solution was obtained after 5 minutes, 12.5 g of oxalic acid was added to the inside, while adding 2.82 g of sodium potassium tartrate, generating yellow turbid solution was sufficiently stirred until dispersed uniformly mixed; the turbid solution placed in a centrifuge cup and centrifuged at 4000 rpm / min for 5 minutes conditions, the precipitate was washed with 75 ml of deionized water, centrifuged again separation, the supernatant was removed after the above-described operation is repeated twice; yellow precipitate after washing was transferred to a beaker placed in a dry oven at 110 deg.] C for 10 hours, and calcined 600 ℃ 9 hours, to give brick-red powder, the pressed powder molded into particles, referred to as the catalyst 2;

[0037] (2) a reaction catalyst performance test: 1 g of catalyst 2 was evaluated in a fixed bed ...

Embodiment 3

[0039] (1) first weighing 34.75 grams of ferrous sulfate placed in a beaker was added 97.3 g of deionized water, stirred with a magnetic ferrous sulfate solution was obtained after 5 minutes, 22.58 grams of oxalic acid was added to the inside, while adding 8.47 g of sodium potassium tartrate, generating yellow turbid solution was sufficiently stirred until dispersed uniformly mixed; the turbid solution placed in a centrifuge cup and centrifuged at 4000 rpm / min for 5 minutes conditions, the precipitate was washed with 75 ml of deionized water, centrifuged again separation, the supernatant was removed after the above-described operation is repeated twice; yellow precipitate after washing was transferred to a beaker placed in a dry oven at 120 deg.] C for 12 hours, and calcined 650 ℃ 6 hours, to give brick-red powder, the pressed powder molded into pellets, as catalyst 3;

[0040] (2) a reaction catalyst performance test: 1 g of catalyst 3 used in evaluation of a fixed bed reactor,...

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Abstract

The invention discloses a preparation method of an iron-based catalyst with high carbon hydrocarbon selectivity, which comprises the following steps: dissolving ferrous sulfate by using deionized water to obtain a ferrous sulfate solution, and then simultaneously adding oxalic acid and sodium potassium tartrate into the ferrous sulfate solution to form a yellow turbid solution; and performing centrifugal separation on the yellow turbid liquid for multiple times to obtain a yellow precipitate, then drying and roasting the yellow precipitate to obtain brick red powder, and tabletting and molding the brick red powder to obtain the iron-based catalyst. The preparation method is simple and efficient, the invention also discloses the iron-based catalyst prepared by using the preparation method of the iron-based catalyst with high carbon hydrocarbon selectivity, and the iron-based catalyst can catalyze CO2 hydrogenation reaction at low temperature and low pressure to generate a high carbon hydrocarbon product.

Description

Technical field [0001] The present invention belongs to the technical field of catalyst preparation, and more particularly to iron-based catalysts having high carbon modulus and preparation methods and applications thereof. Background technique [0002] The current development of world industries and agriculture relies on a large number of fossil fuels. In recent years, with the acceleration of industrialization, the rapid development of eight key industries such as petrochemical, chemical, building materials and steel has led to an increase in the main greenhouse gas carbon dioxide emissions, and the global warming trend is more serious. Therefore, the greenhouse effect is controlled to reduce the discharge of carbon dioxide. The main method of reducing carbon dioxide content in the atmosphere is: carbon dioxide emission reduction, carbon capture and storage and transformation. Under the premise of not affecting industrial production, it is necessary to achieve carbon dioxide em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/10B01J37/03B01J37/08C07C1/12
CPCB01J23/78B01J37/031B01J37/082C07C1/12C07C2523/78B01J35/613
Inventor 宁文生胡石野管方杰李梅
Owner ZHEJIANG UNIV OF TECH
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