CN103007853A - Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking - Google Patents
Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking Download PDFInfo
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- CN103007853A CN103007853A CN2011102864917A CN201110286491A CN103007853A CN 103007853 A CN103007853 A CN 103007853A CN 2011102864917 A CN2011102864917 A CN 2011102864917A CN 201110286491 A CN201110286491 A CN 201110286491A CN 103007853 A CN103007853 A CN 103007853A
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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
Patent of the present invention relates to the micro passage reaction technology take the foam passage of foam silicon carbon as reactor.This reactor adapted is in the reaction of hydrocarbon cracking preparing low-carbon olefins.
Background technology
Traditional hydro carbons anaerobic thermal cracking producing light olefins is generally filled quartz sand in tube furnace, heat-conducting effect is undesirable, and Pressure Drop is also larger.In addition, the hydrocarbon oxidation cracking realizes interior heat supply owing to having introduced oxygen by the hydro carbons partial oxidation, have higher capacity usage ratio, be conducive to the optimization utilization of heavy hydrocarbon, rising, yet the introducing of oxygen also easily causes hot-spot, has potential safety hazard.The foam silicon carbon material is owing to having good heat-conductive characteristic, and the three-dimensional MCA of its prosperity can be strengthened mixing of materials, and is chemical inertness under the high temperature.These characteristics can solve hydro carbons anaerobic thermal cracking heat and import undesirable problem so that the foam silicon carbon material is incorporated in the hydrocarbon cracking reactor, are conducive to also that reaction mass mixes in the oxygen-containing hydrocarbon cracking, avoid hot-spot, improve reaction harmonious.
Summary of the invention
The purpose of patent of the present invention provides a kind of MCA reactor of filling integral foam carborundum, can be used for the hydrocarbon cracking preparing low-carbon olefins.
Purpose of the present invention reaches by following measure: micro passage reaction provided by the invention is filled and process carborundum integral material in reactor, carries out the reaction of hydrocarbon cracking reaction preparing low-carbon olefins in the foam silicon carbon microchannel.
A kind of silicon carbide microchannel reactor comprises the metallic reactors shell, is filled with overall structure foam silicon carbon material and consists of the microchannel in the metallic reactors shell, and this reactor can be used for preparing low-carbon olefin by hydrocarbon cracking.
Described foam silicon carbon material has the channel diameter scope at 0.1-2mm three-dimensional foam passage.
Quartz or pottery cast heat-insulation layer can be arranged between carborundum and metallic reactors shell.
Described overall structure refers to by a monoblock foam silicon carbon material, and perhaps being combined closely by two blocks of above foam silicon carbon materials consists of an integral body, closely is filled in the reactor.
Described silicon carbide microchannel reactor can be used for C
2-C
6The anaerobic thermal cracking C processed of lower carbon number hydrocarbons
2-C
4Low-carbon alkene, or be used for C
6-C
30Heavy hydrocarbon contain oxygen oxicracking C processed
2-C
4Low-carbon alkene.
The present invention is used for the reaction of hydrocarbon cracking preparing low-carbon olefins.Under the oxygen free condition, adopt outside heat-supplying mode, raw material is C
2-C
6Light paraffins, reaction temperature are 800-850 ℃, and reaction pressure is 0-0.3Mpa, and the time of staying is 0.1-1s.Contain under the oxygen condition, adopt from heat supply (or being referred to as inner heat supply) mode, raw material be carbon number at the various saturated or unsaturated heavy hydrocarbon more than 6, oxygen feed can be purity oxygen, also can be air.Its charging alcoxyl ratio is: n (C
m): n (0
2)=0.5-1.5, reaction temperature is 550-800 ℃, reaction pressure is 0-0.3Mpa, unstripped gas air speed 100-1000h
-1
The present invention has following advantage:
Introduce foam silicon carbon behind reactor, as micro passage reaction, can obviously improve the hydrocarbon cracking reactivity worth with the foam passage of foam silicon carbon.On the one hand, because the integral foam carbofrax material has the good capacity of heat transmission, so that the inside reactor Temperature Distribution is more even; On the other hand, its three-dimensional foam MCA can be strengthened the mixing of reaction mass, is conducive to the lasting generation of radical chain reaction, promotes hydrocarbon cracking, improves hydrocarbon conversion rate.
Description of drawings
Fig. 1 is two kinds of structural representations of apparatus of the present invention.Wherein: (1) reactor stainless steel casing, (2) integral foam silicon carbide microchannel, (3) fire resistant heat preserving cast ceramic layer, (4) olefin product, (5) raw material hydrocarbon, (6) oxygen or air.
The specific embodiment
The reactor upper end is provided with charging aperture, the lower end is provided with discharging opening, adopts circular stainless steel casing, and its inwall is provided with quartzy coating; The round cavity diameter 20mm of reactor, two circular foam silicon carbons of filling are combined closely and are consisted of an overall structure in it, diameter 20mm, height overall 40mm, foam channel diameter 0.5mm has in being encapsulated in the reactor of quartz layer.
This silicon carbide microchannel reactor is used for the hydrocarbon cracking preparing low-carbon olefins, can strengthen reaction mass and mix, reduces reactor temperature difference, improves hydrocarbon cracking active.
This reactor is used for the cyclohexane oxidation cracking reaction.Compare the reactor of not filling carborundum, cyclohexane conversion improves approximately 10%, and under high alcoxyl ratio/cryogenic conditions, conversion ratio promotes more obvious, show that the three-dimensional foam MCA can strengthen the mixing of reaction mass, be conducive to the lasting generation of radical chain reaction, promote hydrocarbon cracking, improve hydrocarbon conversion rate.
Application examples 1
Adopt embodiment 1 described reactor (the left side diagram of Fig. 1), take n-hexane as raw material, add 55.6% diluent nitrogen, reaction pressure 0.1Mpa, the time of staying is 0.7s, has obtained 87% hexane conversion rate and 65% C under 850 ℃ of reaction temperatures
2-C
4Selectivity of light olefin, the reactor radial temperature profile is even.
Application examples 2
Adopt embodiment 1 described reactor (the right side diagram of Fig. 1), be provided with the import of oxygen in the reactor upper end, pass into oxygen, cyclohexane is raw material, and alcoxyl is than n (C
6H
12): n (0
2)=0.8, unstripped gas air speed 250h
-1, reaction pressure is 0.1Mpa, has obtained 91% cyclohexane conversion and 45% C under 750 ℃ of reaction temperatures
2-C
4Selectivity of light olefin, temperature of reactor is evenly distributed.
Claims (6)
1. a silicon carbide microchannel reactor comprises the metallic reactors shell, it is characterized in that: be filled with overall structure foam silicon carbon material and consist of the microchannel in the metallic reactors shell, this reactor can be used for preparing low-carbon olefin by hydrocarbon cracking.
2. according to micro passage reaction claimed in claim 1, it is characterized in that: described foam silicon carbon material has the channel diameter scope at 0.1-2mm three-dimensional foam passage.
3. according to claim 1 or 2 described micro passage reactions, it is characterized in that:
At carborundum and gold
The application of silicon carbide microchannel reactor in preparing low-carbon olefin by hydrocarbon cracking is characterized in that: quartz or ceramic pouring layer can be arranged between the described genus shell of reactor.
4. according to micro passage reaction claimed in claim 1, it is characterized in that: described overall structure refers to by a monoblock foam silicon carbon material, and perhaps being combined closely by two blocks of above foam silicon carbon materials consists of an integral body, closely is filled in the reactor.
5. each described silicon carbide microchannel reactor of claim 1-4 can be used for C
2-C
6The anaerobic thermal cracking C processed of lower carbon number hydrocarbons
2-C
4Low-carbon alkene, or be used for C
6-C
30Heavy hydrocarbon contain oxygen oxicracking C processed
2-C
4Low-carbon alkene.
6. according to application claimed in claim 5, it is characterized in that:
Under the oxygen free condition, adopt outside heat-supplying mode, raw material is C
2-C
6Light paraffins, reaction temperature are 800～850 ℃, and reaction pressure is 0～0.3Mpa, and the time of staying is 0.1～1s;
Contain under the oxygen condition, adopt hydrocarbon partial oxidation from heat-supplying mode, raw material is carbon number at 6-30 saturated or unsaturated heavy hydrocarbon, and the oxygen raw material is purity oxygen or air; Its charging alcoxyl ratio is: n (C
m): n (O
2)=0.5～1.5, the positive integer of m=6-30, reaction temperature are 550～800 ℃, reaction pressure is 0～0.3Mpa, unstripped gas air speed 100～1000h
-1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102864917A CN103007853A (en) | 2011-09-23 | 2011-09-23 | Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking |
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| CN2011102864917A CN103007853A (en) | 2011-09-23 | 2011-09-23 | Silicon carbide micro-channel reactor and application thereof in preparing low carbon olefin from hydrocarbons cracking |
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| CN103007853A true CN103007853A (en) | 2013-04-03 |
Family
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109095927A (en) * | 2018-08-07 | 2018-12-28 | 山东金德新材料有限公司 | A kind of pressureless sintering silicon carbide microchannel reactor chip and preparation method thereof |
| CN109745931A (en) * | 2017-11-08 | 2019-05-14 | 中国科学院金属研究所 | A kind of micro-reaction equipment and its application based on hollow foam material |
| CN113583032A (en) * | 2021-07-23 | 2021-11-02 | 上海化工研究院有限公司 | Cracking device and method for boron trifluoride complex |
| CN114522645A (en) * | 2022-03-15 | 2022-05-24 | 山东中教金源精密仪器有限公司 | Nano-material multiphase photocatalytic microchannel reactor |
| WO2023019718A1 (en) * | 2021-08-18 | 2023-02-23 | 南通三责精密陶瓷有限公司 | Block-hole type silicon carbide microreactor and use thereof |
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| DE3814263A1 (en) * | 1987-04-29 | 1988-11-10 | Shell Int Research | METHOD FOR CATALYTICALLY PRODUCING HYDROCARBONS FROM A HYDROGEN AND GAS MIXTURE CONTAINING CARBON MONOXIDE |
| US20040123626A1 (en) * | 2002-10-29 | 2004-07-01 | Philippe Caze | Coated microstructure and method of manufacture |
| CN1296459C (en) * | 2004-05-14 | 2007-01-24 | 中国石油化工股份有限公司 | Directional reactive catalysis thermal cracking method for direct converting low carbon alkane without need of oxygen |
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2011
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Patent Citations (5)
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| DE3814263A1 (en) * | 1987-04-29 | 1988-11-10 | Shell Int Research | METHOD FOR CATALYTICALLY PRODUCING HYDROCARBONS FROM A HYDROGEN AND GAS MIXTURE CONTAINING CARBON MONOXIDE |
| US20040123626A1 (en) * | 2002-10-29 | 2004-07-01 | Philippe Caze | Coated microstructure and method of manufacture |
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| 孙剑等: "碳化硅微通道中环己烷氧化裂解制低碳烯烃", 《石油化工》, vol. 39, 31 December 2010 (2010-12-31), pages 419 - 421 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109745931A (en) * | 2017-11-08 | 2019-05-14 | 中国科学院金属研究所 | A kind of micro-reaction equipment and its application based on hollow foam material |
| CN109745931B (en) * | 2017-11-08 | 2021-05-18 | 中国科学院金属研究所 | Micro reaction device based on hollow foam material and application thereof |
| CN109095927A (en) * | 2018-08-07 | 2018-12-28 | 山东金德新材料有限公司 | A kind of pressureless sintering silicon carbide microchannel reactor chip and preparation method thereof |
| CN113583032A (en) * | 2021-07-23 | 2021-11-02 | 上海化工研究院有限公司 | Cracking device and method for boron trifluoride complex |
| CN113583032B (en) * | 2021-07-23 | 2024-02-27 | 上海化工研究院有限公司 | Cracking device and method for boron trifluoride complex |
| WO2023019718A1 (en) * | 2021-08-18 | 2023-02-23 | 南通三责精密陶瓷有限公司 | Block-hole type silicon carbide microreactor and use thereof |
| CN114522645A (en) * | 2022-03-15 | 2022-05-24 | 山东中教金源精密仪器有限公司 | Nano-material multiphase photocatalytic microchannel reactor |
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Application publication date: 20130403 |