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A Jet Loop Reactor for Oxidative Coupling of Methane to Ethylene

A loop reactor and oxidative coupling technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low ethylene yield, serious back-mixing, and uneven temperature distribution, so as to improve ethylene yield and operate High elasticity, reducing the effect of depth response

Active Publication Date: 2022-04-08
山西潞安化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a jet loop reactor for the oxidative coupling of methane to ethylene to solve the problems of uneven temperature distribution in the reactor, serious back-mixing, and low ethylene yield

Method used

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  • A Jet Loop Reactor for Oxidative Coupling of Methane to Ethylene
  • A Jet Loop Reactor for Oxidative Coupling of Methane to Ethylene

Examples

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Effect test

Embodiment 1

[0027] A jet loop reactor used for oxidative coupling of methane to produce ethylene, which is divided into a conical bottom zone, a circulation zone, a gas-solid separation zone, a cyclone separation zone and a feed-back zone. The conical bottom area includes the nozzle 1 and the conical bottom 2; the circulation area includes the middle and lower space of the shell 3, the gas distributor 4 and the guide tube 5; the gas-solid separation area includes the upper space of the shell 3; the cyclone separation area includes the cyclone separation area 8; the return area includes material leg 9, heat exchanger 10, return valve 11, secondary air inlet 12, discharge valve 13 and return pipe 14.

[0028] Such as figure 1 As shown, the nozzle 1 is located at the bottom of the conical bottom 2, the conical bottom 2 is located at the bottom of the shell 3, the guide cylinder 5 is placed in the middle and lower part of the shell 3, the gas distributor 4 traverses the shell 3 and its vertic...

Embodiment 2

[0032] The difference from Example 1 is that the average particle size of the catalyst is 100 μm, the reaction temperature is 850°C, and the operation is under normal pressure. The gas component passing through the nozzle is mainly methane, and the gas component passing through the gas distributor and the secondary air inlet is mainly Oxygen and nitrogen with a volumetric space velocity of 8000 h -1 , methane: oxygen: nitrogen molar ratio under the condition of 3:1:1, methane conversion rate was 47%, ethylene yield was 31%.

Embodiment 3

[0034] The difference from Example 1 is that the average particle size of the catalyst is 150 μm, the reaction temperature is 800 ° C, the operating pressure is 5 bar, the gas components passing through the nozzle are mainly methane and oxygen, and the gas passing through the gas distributor and the secondary air inlet The gas components are mainly oxygen and nitrogen, and the volumetric space velocity is 6000 h -1 , Methane: Oxygen: Nitrogen molar ratio of 3:1:1, methane conversion rate of 46%, ethylene yield of 27%.

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Abstract

The invention relates to the technical field of methane conversion, a jet loop reactor for oxidative coupling of methane to ethylene, comprising a nozzle, a conical bottom, a draft tube, a shell, a gas distributor, a cyclone separator, a heat exchanger and The material return device, the nozzle is located at the bottom of the conical bottom, the conical bottom is located at the bottom of the shell, the guide tube is placed in the shell and is at the bottom, the gas distributor traverses the shell and its vertical centerline is in line with the guide tube The center lines coincide, and the top of the shell is provided with a gas outlet on the top of the shell to communicate with the upper part of the cyclone separator (8). The invention utilizes nozzles, conical bottoms, guide tubes and gas distributors to form forced internal circulation of materials, which can promote regular movement of materials, reduce back-mixing, enhance mass transfer and heat transfer, and contribute to uniform temperature in the reactor distribution, improve catalyst utilization and product yield.

Description

technical field [0001] The invention relates to the technical field of methane conversion, in particular to a jet loop reactor used for oxidative coupling of methane to produce ethylene. Background technique [0002] Ethylene is an important basic organic chemical product and raw material, and its production level is an important indicator to measure a country's chemical strength. At present, ethylene production is mainly based on naphtha cracking, which has problems such as high cost, high energy consumption and greenhouse gas emissions. With the development of the international economy, the raw materials for ethylene production tend to be lighter and more diversified. Oxidative coupling of methane (OCM) one-step direct ethylene production technology has the advantages of simple route and good economy. It is an ethylene production technology with broad development prospects and is of great significance to the optimization of my country's energy structure. [0003] The OCM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/08
CPCB01J8/082B01J8/085
Inventor 李德宝高用祥刘俊义林明桂马军祥张力贾丽涛崔艳斌余海兵栗鑫
Owner 山西潞安化工有限公司
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