Metal Element Lattice Doped Silicon Carbide Reactor and Its Application in Ethane Dehydrogenation to Ethylene

A metal element, silicon carbide technology, applied in the field of new reactors, to achieve good ethane conversion rate and ethylene selectivity, reduced energy consumption, and excellent heat transfer performance

Active Publication Date: 2020-06-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the increasing shortage of petroleum resources, the use of abundant sources and cheap ethane dehydrogenation to produce ethylene can avoid the petroleum route, so people are paying more and more attention to it. Although ethane dehydrogenation to ethylene has been industrialized , but due to the limitation of the thermodynamic equilibrium conversion rate, the process needs to be at a higher temperature to obtain the ideal yield, and under the industrial application conditions of large flow rate and low residence time, the heat transfer of the reaction system becomes an influence on the reactor. An important factor of temperature, the metal pipe system widely used now, can have a temperature difference of two hundred degrees between the outer wall temperature and the central temperature, which means the increase of energy consumption. If the temperature difference can be reduced, it is very beneficial to the prospect of industrialization

Method used

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  • Metal Element Lattice Doped Silicon Carbide Reactor and Its Application in Ethane Dehydrogenation to Ethylene
  • Metal Element Lattice Doped Silicon Carbide Reactor and Its Application in Ethane Dehydrogenation to Ethylene
  • Metal Element Lattice Doped Silicon Carbide Reactor and Its Application in Ethane Dehydrogenation to Ethylene

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Experimental program
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Effect test

Embodiment 1

[0028] Mix 1kg SiC powder, 300g high-purity graphite powder, 300g silicon powder, 20g ferric nitrate, 100mL epoxy resin, and 100mL water. The SiC powder is α-SiC with a particle size of 100-400nm and silicon powder with a particle size of 100μm. , sent to the extruder for extruded molding, the molding reactor is a straight tube type, 2 meters in length, 35mm in outer diameter, 25mm in inner diameter, after 4 days of natural drying, it is sent into a 50v muffle furnace to continue drying and dehumidification, and continue to dry and dehumidify in N 2 Under the protection of , it was treated in a high-temperature furnace at 2000°C for 2 days, taken out after cooling down, and the surface of the reactor was finely polished to obtain reactor R1.

Embodiment 2

[0030] Mix 1kg SiC powder, 200g high-purity graphite powder, 200g silicon powder, 20g ferric chloride, 100mL epoxy resin, and 100mL water. The SiC powder is α-SiC with a particle size of 300-1000nm. 100 μm, sent to the extruder for extruded molding, the forming reactor is a straight tube type, 2 meters in length, 15mm in outer diameter, 5mm in inner diameter, after 4 days of natural drying, it is sent to a muffle furnace at 50°C to continue drying and dehumidification, and then Carry out pressing treatment, pressing pressure is 100Mpa, and pressing time is 30 minutes. continue at N 2 Under the protection of , it was treated in a high-temperature furnace at 2000°C for 3 days, taken out after cooling down, and the surface of the reactor was finely polished to obtain reactor R2. figure 2 It is the proton fluorescence spectrogram of the inner wall of the reactor, and the bright spots are Fe atoms, indicating that the distribution of Fe is very uniform.

Embodiment 3

[0032] Mix 1kg SiC powder, 100g carbon black powder, 100g silica powder, 40g nickel chloride, 200mL epoxy resin, and 200mL water evenly. The SiC powder is α-SiC with a particle size of 300-500μm, and the silica The particle size of the powder is 200μm, and it is sent to the extruder for extrusion molding. The forming reactor is a straight tube type, with a length of 2 meters, an outer diameter of 25mm, and an inner diameter of 15mm. After natural drying for 4 days, it is sent to a muffle furnace at 50°C for further drying. Dehumidification continues at N 2 Under the protection of the reactor, it was treated in a high-temperature furnace at 2000°C for 4 days, taken out after cooling down, and the surface of the reactor was finely polished to obtain reactor R3.

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Abstract

The invention relates to a metallic element lattice doped silicon carbide reactor, and applications thereof in preparation of ethene through ethane dehydrogenation. The metallic element lattice dopedsilicon carbide reactor is invented base on a novel silicon carbide material which possesses excellent heat conductivity and chemical reactionlessness; based on the metallic element lattice doped silicon carbide reactor, and reaction conditions, the process is capable of realizing ethene high yield synthesis. The ethane conversion rate ranges from 70 to 100%; ethene selectivity ranges from 80 to 99.99%; propylene selectivity ranges from 0 to 5%; and aromatic hydrocarbons selectivity ranges from 0 to 5%. The metallic element lattice doped silicon carbide reactor possesses following characteristics: catalyst service life is long (>1000h), catalyst high temperature (<1700 DEG C) stability is excellent, ethane conversion rate and product selectivity are high, energy consumption is low, processrepeatability is excellent, and operation is safe and reliable; and the industrialized application prospect is promising.

Description

technical field [0001] The invention relates to a novel reactor based on silicon carbide material, which is successfully applied to the process of ethylene dehydrogenation from ethane. The process realizes efficient conversion of ethane, high selective synthesis of ethylene, and good catalyst stability. Background technique [0002] Ethylene is the basic chemical raw material for synthetic fibers, synthetic rubber, synthetic plastics (polyethylene and polyvinyl chloride), synthetic ethanol (alcohol), and is also used to manufacture vinyl chloride, styrene, ethylene oxide, acetic acid, acetaldehyde, Ethanol and explosives, etc. The ethylene industry is the core of the petrochemical industry. Ethylene products account for more than 70% of petrochemical products and occupy an important position in the national economy. Ethylene production has been used as one of the important indicators to measure the development level of a country's petrochemical industry. [0003] The produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/02C22C29/06C07C5/333C07C11/04
CPCY02P20/52
Inventor 包信和方光宗潘秀莲吕厚甫谭大力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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