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Catalyst for bioethanol dehydrogenation and preparation method and application thereof

A bioethanol and catalyst technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, oxidation preparation of carbonyl compounds, etc., can solve the problems of unfavorable separation, short service life, easy poisoning of catalysts, etc., and achieve high acetaldehyde selectivity. Effect

Inactive Publication Date: 2019-11-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of catalyst is easy to sinter and agglomerate, which makes its service life short and the catalyst is easy to be poisoned. Moreover, there are many types of by-products in this type of catalytic reaction, which is not conducive to subsequent separation.

Method used

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  • Catalyst for bioethanol dehydrogenation and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 4.3Co 2 Preparation and evaluation of C-70 / SBA-15 catalyst:

[0024] (1) Prepare an aqueous solution of cobalt nitrate with a concentration of 0.07 mol / L or an aqueous solution of cobalt nitrate with a concentration of 0.07 mol / L;

[0025] (2) adding the SBA-15 carrier material to the solution obtained in step (1), and impregnating the carrier for 15 minutes using an equal volume impregnation method;

[0026] (3) put the mixture obtained in step (2) at 80 o C drying for 6 h;

[0027] (4) The sample obtained in step (3) was placed in an air atmosphere for 400 o C roasting for 4 h;

[0028] (5) The sample obtained in step (4) was carbonized in a CO atmosphere (CO flow rate 40 mL / min / g-sample) for 70 h, then quenched to room temperature, and then heated to 1 % O 2 The catalyst is obtained by passivation in the mixed gas of / Ar for 12 h;

[0029] (6) The ethanol dehydrogenation reaction is carried out in a fixed bed reactor using bioethanol with a mass fraction of 20%...

Embodiment 2

[0031] 4.3Co 2 Preparation and evaluation of C-90 / SBA-15 catalyst:

[0032] (1) Prepare a cobalt nitrate aqueous solution with a concentration of 0.07 mol / L or a cobalt nitrate ethanol solution with a concentration of 0.07 mol / L;

[0033] (2) adding the SBA-15 carrier material to the solution obtained in step (1), and impregnating the carrier for 15 minutes using an equal volume impregnation method;

[0034] (3) put the mixture obtained in step (2) at 80 o C drying for 6 h;

[0035] (4) The sample obtained in step (3) was placed in an air atmosphere for 400 o C roasting for 4 h;

[0036] (5) The sample obtained in step (4) was carbonized for 90 h in a CO atmosphere (CO flow rate 40 mL / min / g sample), then quenched to room temperature, and then heated to 1 % O 2 The catalyst is obtained by passivation in the mixed gas of / Ar for 12 h;

[0037] (6) The ethanol dehydrogenation reaction is carried out in a fixed bed reactor using bioethanol with a mass fraction of 20% as a ra...

Embodiment 3

[0039] 8.3Co 2 Preparation and evaluation of C-90 / SBA-15 catalyst:

[0040] (1) Prepare a cobalt nitrate aqueous solution with a concentration of 0.14 mol / L or a cobalt nitrate ethanol solution with a concentration of 0.14 mol / L;

[0041] (2) adding the SBA-15 carrier material to the solution obtained in step (1), and impregnating the carrier for 15 minutes using an equal volume impregnation method;

[0042] (3) put the mixture obtained in step (2) at 80 o C drying for 6 h;

[0043] (4) The sample obtained in step (3) was placed in an air atmosphere for 400 o C roasting for 4h;

[0044] (5) The sample obtained in step (4) was carbonized for 120 h in a CO atmosphere (CO flow rate 40 mL / min / g sample), then quenched to room temperature, and then heated to 1 % O 2 The catalyst is obtained by passivation in the mixed gas of / Ar for 12 h;

[0045] (6) The ethanol dehydrogenation reaction is carried out in a fixed bed reactor using bioethanol with a mass fraction of 20% as a ra...

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Abstract

The invention provides a catalyst for preparing acetaldehyde through bioethanol dehydrogenation as well as a preparation method and application of the catalyst. The catalyst is a supported catalyst, an active component is Co2C, a carrier of the catalyst is an SBA-15 material, and the mass content of the active component Co2C is 4.3-8.3%. The catalyst provided by the invention can be directly usedwithout reductive activation, and has very high acetaldehyde selectivity, and the acetaldehyde selectivity is higher than 96.5%; and the preparation method of the catalyst provided by the invention issimple, does not need reduction treatment, and does not need addition of additives.

Description

technical field [0001] The invention relates to a catalyst for preparing acetaldehyde by dehydrogenation of biological ethanol, a preparation method and application thereof, and belongs to the technical field of chemical catalysis, in particular to a catalyst for preparing acetaldehyde by dehydrogenation of biological ethanol under the condition of gas-phase atmospheric pressure reaction. Background technique [0002] With the increasing depletion of fossil energy and the more serious environmental pollution problems, countries around the world are highly committed to the research and development of clean energy. Because hydrogen is widely present in nature in various forms, its abundance is high, and its gas form—hydrogen has the characteristics of good combustion performance and only water as the combustion product, which makes hydrogen energy highly valued and is expected to become the most potential development in the 21st century. of clean energy. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C07C45/29C07C47/06
CPCB01J27/22C07C45/29C07C47/06
Inventor 裴彦鹏于倩男牟宗刚鲍猛王晓轩彭翠娜
Owner UNIV OF JINAN