Two-dimensional iron monatomic catalyst as well as preparation and application thereof in production of ethylene by reduction of 1,2-dichloroethane

A catalyst and atomic technology, applied in the direction of physical/chemical process catalysts, electrolytic organic production, chemical instruments and methods, etc., can solve the problems of insufficient application requirements, insufficient catalyst activity or ethylene selectivity, and achieve superior catalytic performance, The effect of accelerating the electron transfer rate and mild conditions

Active Publication Date: 2020-07-31
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalysts do not have sufficient activity or ethylene selectivity to meet the application requirements

Method used

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  • Two-dimensional iron monatomic catalyst as well as preparation and application thereof in production of ethylene by reduction of 1,2-dichloroethane
  • Two-dimensional iron monatomic catalyst as well as preparation and application thereof in production of ethylene by reduction of 1,2-dichloroethane
  • Two-dimensional iron monatomic catalyst as well as preparation and application thereof in production of ethylene by reduction of 1,2-dichloroethane

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Preparation of two-dimensional iron single-atom catalysts:

[0040] (1) 2.0g FeCl 3 ·6H 2 O was dissolved in 5 mL of deionized water to obtain solution A, while 0.2 g of dopamine hydrochloride was dissolved in 2 mL of deionized water to obtain solution B, stirred until FeCl 3 ·6H 2 O and dopamine hydrochloride are completely dissolved;

[0041] (2) Slowly add solution B dropwise to solution A, stir evenly, and leave to age for 12 hours;

[0042] (3) Transfer the aged solution to a quartz boat, place it in a drying oven, and dry it at 80°C for 24 hours;

[0043](4) Transfer the dried quartz boat to a tube furnace, and calcine at 800°C for 2h under the protection of argon, wherein the heating rate is 5°C / min, and naturally cool to room temperature;

[0044] (5) Grind the calcined catalyst into powder, add 30mL of 0.1M sulfuric acid solution, ultrasonically wash to remove excess iron salts and other forms of iron species, filter, and dry to obtain a two-dimensional ir...

Embodiment 2

[0050] Difference with embodiment 1 is: in the step (1) FeCl 3 ·6H 2 The amount of O used was 1.0 g, and the obtained material was named Catalyst 3, and the reaction results are listed in Table 1.

Embodiment 3

[0052] Difference with embodiment 1 is: in the step (1) FeCl 3 ·6H 2 The amount of O was 3.0 g, and the obtained material was named catalyst 4, and the reaction results are listed in Table 1.

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Abstract

The invention relates to a two-dimensional iron monatomic catalyst for producing ethylene through reduction of 1,2-dichloroethane as well as a preparation method and application thereof. The catalystis prepared through the steps of self-template polymerization, drying, calcining, dipping and the like, the catalyst is composed of three elements of Fe, N and C, the percentage content of iron is 0.5-3%, and the iron is dispersed on a two-dimensional nitrogen-doped carbon matrix in a monatomic form. The two-dimensional iron monatomic catalyst provided by the invention presents a uniform ultrathinstructure, has excellent conductivity and electrochemical catalysis function, and shows excellent activity, selectivity and stability on ethylene production by electrocatalytic reduction dechlorination of 1,2-dichloroethane when being applied as an electrochemical cathode catalyst. The preparation method of the monatomic catalyst provided by the invention is simple and easy to implement and relatively low in cost, and meanwhile, the catalyst shows excellent catalytic performance in a reaction for preparing ethylene by dechlorinating 1,2-dichloroethane, and has a wide industrial application prospect.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a two-dimensional iron single-atom catalyst, its preparation and its application in the reduction of 1,2-dichloroethane to produce ethylene. Background technique [0002] Ethylene is an important raw material for the production of various chemical intermediates and polymers in the chemical industry, with an annual global consumption of about 150 million tons. At present, the conventional method for preparing ethylene is the high-temperature (>750°C) gas-phase free radical cracking reaction of hydrocarbon feedstocks such as ethane or naphtha, which is energy-intensive and carbon-intensive. Therefore, it is imminent to develop advanced and efficient ethylene production methods. Electrocatalytic reduction dechlorination of 1,2-dichloroethane is a new cost-effective, green and environmentally friendly way to prepare ethylene. However, due to the strong C-Cl bond energy and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B11/06C25B3/04C25B3/25
CPCB01J27/24B01J35/0033C25B11/04C25B3/25
Inventor 李新勇甘国强王亮李季梁峰范诗迎许凤泉
Owner DALIAN UNIV OF TECH
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