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Preparation method and application of alloy monatomic catalyst

A catalyst, copper catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, oxidation to prepare carbonyl compounds, etc., can solve problems such as poor activity, low ethanol conversion rate, and poor catalyst stability , to achieve the effect of low cost, high reaction efficiency and good stability

Active Publication Date: 2022-02-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this catalyst still has disadvantages such as poor activity, low conversion rate of ethanol under the same conditions, and poor stability of the catalyst

Method used

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  • Preparation method and application of alloy monatomic catalyst
  • Preparation method and application of alloy monatomic catalyst
  • Preparation method and application of alloy monatomic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Carrier handling:

[0044] Take Hβ molecular sieve with a silicon-aluminum ratio of 25 as an example: 10 g of Hβ molecular sieve was weighed and added to 100 mL of 66% nitric acid solution, and treated at 80° C. for 24 hours. Then, it is filtered, washed, and calcined at 550° C. for 3 hours to obtain a dealuminated Hβ molecular sieve. The aluminum content of the sample after dealuminated is determined by XRF to be less than 1 wt%.

[0045] Preparation of Copper-Based Catalyst: Preparation of Cu-Hβ-deAl Catalyst by Ammonia Distillation

[0046] Using copper acetate as the precursor, the process of preparing the catalyst by ammonia distillation is as follows: Weigh 3.1 g of copper acetate, add it to a three-necked flask containing 70 mL of distilled water, stir until it is completely dissolved, then slowly add 16 mL of ammonia water with a mass fraction of 25%, At this time, the pH of the solution was 11-12, and the solution was sealed and stirred vigorously for 90 minut...

Embodiment 2

[0050] Embodiment 2 is only different from Embodiment 1 in that the second metal is Fe;

Embodiment 3

[0051] Embodiment 3 is only different from Embodiment 1 in that the second metal is Co;

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Abstract

The invention provides an alloy monatomic catalyst as well as a preparation method and application thereof. The alloy monatomic catalyst is prepared through a two-step method, a carrier is silicon dioxide, and active components are copper and a second metal; wherein the copper content is 1wt%-30wt%, the second metal is at least one of transition metals in the eighth group, the ninth group and the tenth group, and the content of the second metal is 0.01 wt%-2wt%. The catalyst is used in a direct dehydrogenation reaction of ethanol, the reaction is carried out on a fixed bed, the reaction atmosphere is one or more than two of hydrogen, nitrogen, helium and argon, the reaction temperature is greater than or equal to 120 DEG C, the acetaldehyde selectivity is greater than 90%, and the catalyst can stably run for more than 500 hours. Compared with the existing acetaldehyde production technology, the method provided by the invention adopts bioethanol as the raw material, and has the advantages of abundant reserves, environmental friendliness, greenness, no pollution and the like. Meanwhile, the bioethanol is high in economical efficiency and wide in utilization approach. In addition, the catalyst is low in price, high in reaction selectivity and good in stability, products are easy to separate, and the method has important economic value and industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of bioenergy chemical industry, and in particular relates to an alloy single-atom catalyst and its preparation method and application. Background technique [0002] With the depletion of fossil fuels, the aggravation of environmental pollution and the rapid development of fermentation technology, ethanol as a new energy chemical platform compound has attracted widespread attention. By 2010, the production of ethanol reached 60 billion liters. At present, most of ethanol is mainly used for adding oil products, thereby partially replacing fuel oil. However, based on the limitation of safety and solvent compatibility, the amount of ethanol added to oil is limited, only less than 10%, which seriously restricts the development and application of ethanol. [0003] In recent years, the high-value utilization of ethanol has been fully developed, forming diversified products such as butanol and 1,3-butadiene, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755B01J23/75B01J23/89C07C47/07C07C45/29
CPCB01J23/745B01J23/755B01J23/75B01J23/8926C07C45/29C07C47/06Y02P20/52
Inventor 庞纪峰郑明远李新生李显泉张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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