Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking

A micro-channel reactor, the technology of the reactor, which is applied in the fields of hydrocarbon cracking to produce hydrocarbons, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as potential safety hazards, overheating, and large pressure drop.

Inactive Publication Date: 2013-04-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0002] The traditional oxygen-free thermal cracking of hydrocarbons to produce low-carbon olefins is generally filled with quartz sand in the tube furnace, which has poor heat conduction effect and relatively large pressure drop.
In addition, due to the introduction of oxygen, the oxidative cracking of h...

Method used

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  • Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking

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Embodiment 1

[0015] The upper end of the reactor is equipped with a material inlet and the lower end is equipped with a material outlet. It adopts a circular stainless steel shell with a quartz coating on the inner wall; the diameter of the circular inner cavity of the reactor is 20mm, and it is filled with two circular foam carbonization The silicon is closely combined to form an overall structure with a diameter of 20mm, a total height of 40mm, and a foam channel diameter of 0.5mm, which is encapsulated in a reactor with a quartz layer inside.

[0016] The silicon carbide microchannel reactor is used for cracking hydrocarbons to produce low-carbon olefins, which can strengthen the mixing of reaction materials, reduce the temperature difference in the reactor, and increase the cracking activity of hydrocarbons.

[0017] The reactor is used for cyclohexane oxidative cracking reaction. Compared with the reactor not filled with silicon carbide, the conversion rate of cyclohexane increased by...

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Abstract

The invention relates to a silicon carbide micro-channel reactor for preparing low carbon olefin from hydrocarbons cracking. The reactor is filled with an integral foam silicon carbide material to form the micro-channels, and is provided with a metal reactor housing outside the reactor, and a ceramic casting heat-insulation layer between the silicon carbide and the metal reactor, wherein the integral foam silicon carbide material has a micro-channel structure of three-dimensional foam. The silicon carbide micro-channel reactor is used for preparing the low carbon olefin from the hydrocarbons cracking; and can reinforce mixing of reacted materials, reduce temperature differences in the reactor and improve activity of the hydrocarbons cracking.

Description

technical field [0001] The patent of the present invention relates to the microchannel reactor technology using the foam channel of foamed silicon carbide as the reactor. The reactor is suitable for the reaction of producing light olefins by cracking hydrocarbons. Background technique [0002] The traditional anaerobic thermal cracking of hydrocarbons to produce low-carbon olefins is generally filled with quartz sand in the tube furnace, which has unsatisfactory heat conduction effect and relatively large pressure drop. In addition, due to the introduction of oxygen, the oxidative cracking of hydrocarbons realizes internal heat supply through partial oxidation of hydrocarbons, which has a high energy utilization rate and is conducive to the optimal utilization of heavy hydrocarbons. It is very promising, but the introduction of oxygen is also easy. Lead to local overheating, there is a safety hazard. Foamed silicon carbide material has excellent thermal conductivity, and i...

Claims

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Application Information

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IPC IPC(8): B01J19/00C07C11/02C07C4/04
Inventor 李春林徐恒泳孙剑
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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