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Catalyst for preparing aromatic hydrocarbons through directed conversion of CO2 and preparation method of catalyst

A directional conversion, catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, carbon compound catalysts, etc., can solve the problems of stability and repeatability of industrial application of catalyst systems, without quantitative control of the distance between components, Aromatization efficiency is reduced and other problems, to achieve the effect of high repeatability, uniform properties, and high CO2 conversion rate

Active Publication Date: 2019-07-09
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too large component spatial distance will lead to too many intermediate components, and the aromatization efficiency will decrease
However, the existing mechanical mixing preparation method does not have the means and methods to quantitatively control the distance between components, which undoubtedly brings stability and repeatability to the industrial application of the catalyst system.

Method used

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  • Catalyst for preparing aromatic hydrocarbons through directed conversion of CO2 and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a CO 2 A catalyst for the directional conversion of aromatics, a core-shell structure Zn@ZSM-5 catalyst with ZnO as the core and ZSM-5 molecular sieve as the shell.

[0025] a CO 2 A method for preparing a Zn@ZSM-5 catalyst for preparing aromatics through directional conversion: comprising the following steps:

[0026] 1) Mix zinc nitrate hexahydrate and terephthalic acid at a molar ratio of 3:1, weigh 50g of the mixture and disperse it in 500mL of N,N-dimethylformamide, stir and mix evenly, and place in a hydrothermal kettle Hydrothermal treatment at 150°C for 12 hours, suction filtration and drying to obtain metal skeleton compound A1;

[0027] 2) Disperse A1 in 500mL of silica sol (silica content 15% (w%)), then add 10g of aluminum nitrate and 0.5g of tetrapropylammonium hydroxide, adjust the pH to 9, place in a hydrothermal kettle at Treat at 180°C for 36 hours, suction filter, and dry to obtain solid powder B1; put solid powder B1 into a muffle furnace and calci...

Embodiment 2

[0029] a CO 2 Catalysts for directional transformation of aromatics to ZrO 2 As the core, the core-shell structure Zr@MCM-41@ZSM-5 catalyst with MCM-41 and ZSM-5 molecular sieve as the shell.

[0030] a CO 2 The preparation method of the Zr@MCM-41@ZSM-5 catalyst for the directional conversion of aromatics: comprising the following steps:

[0031] 1) Mix zirconium chloride and trimesic acid at a molar ratio of 5:1, weigh 40g and dissolve in 300mL N,N-dimethylformamide / formic acid (volume ratio 1:1) mixed solution, stir After uniformity, place in a hydrothermal kettle at 120°C for hydrothermal reaction for 18 hours, filter and dry to obtain metal skeleton compound A2;

[0032]2) Disperse the solid powder A2 in 300mL of silica sol (silica content 15% (w%)), add 0.2g of cetyltrimethylammonium bromide, adjust the pH to 10, and then hydrothermally treat at 180°C for 36h , filtered and dried to obtain solid powder B2; disperse the solid powder B2 in an aqueous aluminum nitrate so...

Embodiment 3

[0034] a CO 2 The catalyst for the directional conversion of aromatics is a core-shell structure ZnCo@ZSM-5 catalyst with ZnO and CoO as the core and ZSM-5 molecular sieve as the shell.

[0035] a CO 2 A method for preparing a ZnCo@ZSM-5 catalyst for preparing aromatics through directional conversion: comprising the following steps:

[0036] 1) Mix zinc nitrate hexahydrate and terephthalic acid at a molar ratio of 3:1, weigh 50g of the mixture and disperse it in 500mL of N,N-dimethylformamide, stir and mix evenly, and place in a hydrothermal kettle Hydrothermal treatment at 150°C for 12 hours, suction filtration, and drying to obtain metal-organic framework compound A3; mix cobalt nitrate hexahydrate and 2-methylimidazole at a molar ratio of 4:1, weigh 50 g of the mixture and disperse it in 300 mL of methanol, After mixing evenly, place in a hydrothermal kettle for 12 hours at 100°C, filter and dry to obtain metal organic framework compound A4;

[0037] 2) Mix the solid pow...

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Abstract

The invention discloses a catalyst for preparing aromatic hydrocarbons through directed conversion of CO2, and relates to the technical field of catalytic hydrogenation. Metal oxide is adopted as a core, and a a molecular sieve is adopted as a shell so as to obtain the core-shell structure catalyst, wherein the metal ion center of the metal organic compound is one or more of Zn<2+>, Zr<2+>, Fe<3+>, Co<2+>, Ni<2+>, Cu<2+>, Cr<3+> and Mn<2+>, and the molecular sieve is one or more of ZSM-5, MCM-41, SAPO, MCM-22, USY and SBA-15. The catalyst for preparing aromatic hydrocarbons through directed conversion of CO2 has the characteristics of a uniform structure, uniform properties and precise regulation, the preparation process has simple procedures and high repeatability, and the prepared catalyst has the advantages of high conversion rate of CO2, high selectivity to aromatic hydrocarbons, a long service life, a wide application range and the like; and the prepared catalyst can be directly applied to preparation of aromatic hydrocarbons through directed conversion of CO2, and has an industrial value.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrogenation, in particular to a CO 2 Catalyst for preparing aromatics by directional transformation and its preparation method. Background technique [0002] With the rapid development of the economy and the increasing demand for global energy, the pressure on carbon emissions is also increasing. will CO 2 Converted to chemicals or fuels, on the one hand can solve atmospheric CO 2 The environmental problems caused by the increase of concentration, on the other hand, can also reduce the dependence on fossil fuels, which is of great significance to the energy structure, ecological environment and people's life of our country and even the global community of shared future. Due to CO 2 The chemical properties are stable, and at the same time subject to the kinetic barrier between C-C bonds, CO 2 Selective conversion to prepare C1 compounds such as methanol, methane, and formic acid is relativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46B01J29/78B01J29/80B01J29/85B01J35/02B01J37/08C07C1/12C07C15/02
CPCB01J37/086B01J29/405B01J29/005B01J29/46B01J29/80B01J29/85B01J29/7876C07C1/12B01J29/041B01J29/0308B01J29/0333B01J29/146B01J2229/186C07C2529/40C07C2529/46C07C2529/78C07C2529/80C07C2529/85B01J35/50C07C15/02
Inventor 徐威丁良辉丁克强
Owner NANJING INST OF TECH
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