CN110142009A - A kind of fluidized bed reaction and technique for Catalyst for Oxidative Coupling of Methane - Google Patents
A kind of fluidized bed reaction and technique for Catalyst for Oxidative Coupling of Methane Download PDFInfo
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- CN110142009A CN110142009A CN201910446679.XA CN201910446679A CN110142009A CN 110142009 A CN110142009 A CN 110142009A CN 201910446679 A CN201910446679 A CN 201910446679A CN 110142009 A CN110142009 A CN 110142009A
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- fluidized bed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/38—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it
- B01J8/384—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only
- B01J8/388—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only externally, i.e. the particles leaving the vessel and subsequently re-entering it
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
- C07C2/82—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling
- C07C2/84—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention discloses a kind of fluidized bed reactions and technique for Catalyst for Oxidative Coupling of Methane, fluidized bed reaction is by fluidized bed, cyclone separator and heat exchanger are constituted, fluidized bed outermost layer has refractory material, fluidized bed bottom end is equipped with primary air inlet and extra-air inlet, there is heat exchanger tube in fluidized bed outer refractory, there is secondary air inlet between circulating cooling medium inlet and outlet, the top export of fluidized bed and the import of cyclone separator connect, the solid outlet of cyclone separator is connected by dipleg with heat exchanger, feed inlet is equipped on dipleg, heat exchanger bottom end is equipped with and blows port and discharge port, heat exchanger is connected by refeed line with fluidized bed, refeed line is equipped with returning charge valve.The present invention has the advantages that methane conversion is high, yield of ethene is high, stable.
Description
Technical field
The present invention relates to a kind of fluidized bed reactions and technique for Catalyst for Oxidative Coupling of Methane, and in particular to one
The fluidized bed reaction of kind methane one-step method ethylene, belongs to ethylene preparation field.
Background technique
Ethylene is petrochemical industry and the staple product of organic chemical industry, with the development of world economy, the demand of ethylene by
Year increases.Future world ethylene production capacity will continue very fast growth, raw material more lighting and diversification.Natural gas resource not only comes
Source is abundant, and clean and environmental protection.Methane is the main component of natural gas, shale gas, coal bed gas, combustible ice.In the long run, methane
Technique for producing ethylene has preferable development prospect.
Compared to natural gas indirect reformer method, methane oxidation coupling (OCM) ethylene processed only needs single step reaction that can turn methane
Ethylene is turned to, with the short advantage with good economy performance of process, the application of OCM technology will be conventional ethylene production technology development process
In a revolution, by countries in the world most attention.Research and development unit passes through improvement catalyst performance and optimization both at home and abroad at present
Structure of reactor realizes the high yield of ethylene.External OCM technology (US2017/0107162 A1) research and development are with U.S. Siluria public affairs
Department is the most typical, is currently ongoing runin hair.Domestic Chinese Academy of Sciences Lanzhou Chemical Physics research institute (CN 1187118C,
CN102093157A it) is directed to OCM process, develops Na2WO3-Mn/SiO2Catalyst has a good application prospect.It is worth note
What is anticipated is the anaerobic catalyzed conversion technique for producing ethylene of Dalian Chemiclophysics Inst., Chinese Academy of Sciences's exploitation, is obtained both domestic and external extensive
Concern.
The reaction of OCM technology is strong exothermal reaction, and timely transfer reaction heat is needed in reaction process, avoids reactor local
Overheat, influences the catalytic activity of catalyst, reduces the yield of ethylene.Therefore, suitable reactors are selected and can be removed in time anti-
The control technique for answering heat is the critical issue of OCM engineeringization research and development.Type of reactor currently used for OCM reaction process
Mainly there are fluidized-bed reactor, fixed bed reactors, membrane reactor etc., fluidized-bed reactor is uniform with temperature, it is hot efficiently to move,
Can online more catalyst changeout, easily enlargement production the advantages that, become the emphasis of research and development.
Summary of the invention
The present invention is directed to the response characteristic of Catalyst for Oxidative Coupling of Methane, provides a kind of for methane oxidation coupling second
The fluidized bed reaction and technique of alkene, the high conversion rate of methane, the selectivity height of ethylene, high income.
The fluidized-bed reactor that the present invention uses is additionally arranged heat and changes pipe, can remove the heat that reaction generates in time, guarantees
Reaction carries out at a constant temperature；And it is additionally arranged secondary air inlet, make in fluidized-bed reactor unstripped gas distribution more uniform, raising is urged
The utilization efficiency of agent has the advantages that temperature uniformly, efficiently moves heat, improves reaction efficiency.
The present invention provides a kind of fluidized bed reactions for Catalyst for Oxidative Coupling of Methane, including fluidized bed, rotation
Wind separator and heat exchanger,
Fluidized bed outermost layer has refractory material, and fluidized bed bottom end is equipped with primary air inlet and extra-air inlet, primary air inlet and distribution grid
It communicates, extra-air inlet is located at bottom fluidization bed axis direction；Portion is equipped with secondary air inlet and distribution pipe, Secondary Air in a fluidized bed
Import is connected with corresponding distribution pipe；
Lower part is built-in with heat exchanger tube in a fluidized bed, and heat exchanger tube is located on the inside of refractory material, there is circulating cooling below heat exchanger tube
Medium entrance has circulating cooling medium outlet above heat exchanger tube, is equipped with Secondary Air between circulating cooling medium inlet and outlet
Import,
The import of fluidized bed top export and cyclone separator connects, and the solid outlet of cyclone separator passes through dipleg and heat exchanger
It is connected, feed inlet is equipped on dipleg, heat exchanger bottom end is equipped with and blows port and discharge port, has heat exchanger tube inside heat exchanger, change
Hot device lower part is equipped with circulating cooling medium import, and heat exchanger top is exported equipped with circulating cooling medium, and heat exchanger passes through refeed line
It is connected with fluidized bed lower part, refeed line is equipped with returning charge valve.
The secondary air inlet and distribution pipe, which are matched, is arranged with 1 ~ 4.The distribution pipe is circular ring shape pipe, in circular ring shape pipe face
Several qi-emitting holes are uniformly provided with to the side in the center of circle.
Horizontal plane disposed inboard has 4 ~ 20 qi-emitting holes on the inside of the distribution pipe.
The present invention provides a kind of fluidized-bed reaction techniques for Catalyst for Oxidative Coupling of Methane, using above-mentioned fluidisation
Bed reaction device, comprising the following steps:
1) first by fluidized bed baker to reaction temperature, then by raw material reaction gas from primary air inlet, extra-air inlet and Secondary Air into
Mouth is passed through in fluidized bed, and opening blows port introducing and blows gas；2) and returning charge valve is opened, catalyst is added from feed inlet and is fluidized
Bed；3) the circulating cooling medium inlet and outlet of fluidized bed, heat exchanger is opened；4) catalyst and reaction gas are in stream in fluidized bed
Simultaneously catalysis reaction occurs for state state；5) air-flow for carrying catalyst granules moves upwards in fluidized bed, into cyclonic separation
Device, after cyclone separator gas solid separation, solid catalyst falls into dipleg, gas of the product gas after separation from cyclone separator
Outlet discharge；6) solid catalyst under cyclone separator separation initially enters dipleg, then is cooled down by heat exchanger, in returning charge valve
Control under through refeed line return to fluidized bed, whole process circulation carries out.
Using above-mentioned fluidized bed reaction, use average grain diameter for 20 ~ 200 μm of catalyst granules, with methane, oxygen
It is reaction gas with nitrogen, is 600 ~ 800 DEG C in reaction temperature, reaction pressure is normal pressure to 1.0MPaG, air speed is 2000 ~
20000h-1, alcoxyl ratio is 2:1 ~ 8:1, and under conditions of oxygen nitrogen ratio is 2:1 ~ 1:5, methane conversion is > 40%, the yield of ethylene
For > 20%.
The heat exchanger main function is the temperature for reducing solid catalyst.Cooling medium includes water, in water vapour
One or both mixture.
The raw material reaction gas for entering fluidized bed from primary air inlet, extra-air inlet, secondary air inlet can be methane, oxygen
Gas, nitrogen or their mixed gas.
Beneficial effects of the present invention:
(1) catalyst is in fluidized state in reactor, and the relative velocity of gas and particle is big, is conducive to mass-and heat-transfer, protects
Temperature is uniform in card fluidized bed, avoids hot-spot.
(2) the multiple spot intake method of annular secondary wind improves evenly distributing for raw material in reactor, increases fluidized bed
Runing adjustment means ensure that the security and stability of fluidized bed process.
(3) part reaction gas is entered in fluidized bed by Secondary Air, ensure that high methane conversion and ethylene selectivity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of fluidized bed reaction of the present invention；
Fig. 2 is the structural schematic diagram of distribution pipe of the present invention；
Fig. 3 is the cross sectional plan view in Fig. 2 along line A-A.
In figure: 1 is extra-air inlet；2 be primary air inlet；3 be distribution grid；4a is first circulation cooling medium inlet；4b is
Second circulation cooling medium inlet；5a is the first heat exchanger tube；5b is the second heat exchanger tube；6a is the first distribution pipe；6b is second point
Piping；7a is secondary air inlet I；7b is secondary air inlet II；8a is the outlet of first circulation cooling medium；8b is that second circulation is cold
But media outlet；9 be fluidized bed；10 be refractory material；11 export for fluidized bed gas；12 be cyclone separator gas vent；
13 be cyclone separator；14 be feed inlet；15 be dipleg；16 be heat exchanger；17 be to blow port；18 be discharge port；19 be to return
Expect valve；20 be refeed line；21 be qi-emitting hole.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment 1
As shown in Fig. 1 ~ 3, a kind of fluidized bed reaction for Catalyst for Oxidative Coupling of Methane, it is by fluidized bed 9, whirlwind
Separator 13 and heat exchanger 16 are constituted, and fluidized bed outermost layer has refractory material 10, and 9 bottom end of fluidized bed is equipped with primary air inlet 2 and pair
Air inlet 1, what is communicated with primary air inlet is distribution grid 3, is built-in with the first heat exchanger tube 5a, the first heat exchange in 9 middle and lower part of fluidized bed
Pipe 5a is arranged in refractory material 10, there is first circulation cooling medium inlet 4a below the first heat exchanger tube 5a, in the first heat exchange
There is first circulation cooling medium to export 8a above pipe, first circulation cooling medium inlet 4a and first circulation cooling medium export 8a
Between have I 7a of secondary air inlet, what is be connected with II 7a of secondary air inlet is the first distribution pipe 6a, 9 top export of fluidized bed
11 connect with the import of cyclone separator 13, and the solid outlet of cyclone separator 13 is connected by dipleg 15 with heat exchanger 16,
Dipleg 15 is equipped with feed inlet 14, and 16 bottom end of heat exchanger is equipped with and blows port 17 and discharge port 18, has second inside heat exchanger 16
Heat exchanger tube 5b, 16 lower part of heat exchanger are equipped with second circulation cooling medium inlet 4b, and 16 top of heat exchanger is cooling equipped with second circulation
Media outlet 8b, heat exchanger 16 are connected by refeed line 20 with 9 lower part of fluidized bed, and refeed line 20 is equipped with returning charge valve 19.
As shown in Figure 2,3, the secondary air inlet and distribution pipe, which are matched, is arranged with 1 ~ 4.The distribution pipe is circular ring shape pipe,
4 ~ 20 qi-emitting holes are uniformly provided with towards the side in the center of circle in circular ring shape pipe.
As shown in Figure 1, first by 9 baker of fluidized bed to reaction temperature before driving, then by raw material reaction gas from primary air inlet
2, extra-air inlet 1 and secondary air inlet are passed through in fluidized bed 9, and opening blows the introducing of port 17 and blows gas；And returning charge valve 19 is opened,
Fluidized bed 9 is added from feed inlet 14 in catalyst；Open the circulating cooling medium inlet and outlet of fluidized bed 9, heat exchanger 16；It urges
Agent and reaction gas in fluidized state and occur catalysis and react in fluidized bed 9；The air-flow for carrying catalyst granules is fluidizing
It is moved upwards in bed 9, into cyclone separator 13, after 13 gas solid separation of cyclone separator, solid catalyst falls into dipleg 15,
Product gas after separation is discharged from the gas vent 12 of cyclone separator 13；Solid catalyst under cyclone separator 13 separates is first
It is introduced into dipleg 15, is cooled down by heat exchanger 16, returns to fluidized bed 9 through refeed line 20 under the control of returning charge valve 19, entirely
Process circulation carries out.Catalyst for Oxidative Coupling of Methane reaction is strongly exothermic process, removes waste heat by circulating cooling medium,
Guarantee that reaction carries out under optimal reaction condition.
Using fluidized bed reaction shown in FIG. 1, use average grain diameter for 140 μm of catalyst granules, with methane, oxygen
Gas and nitrogen are reaction gas, are 720 DEG C in reaction temperature, reaction pressure is normal pressure, air speed 2000h-1, alcoxyl ratio is 3:1, oxygen
Under conditions of nitrogen ratio is 1:1, methane conversion 41%, the yield of ethylene is 24%.
Embodiment 2
Using fluidized bed reaction shown in FIG. 1, use average grain diameter for 80 μm of catalyst granules, with methane, oxygen and
Nitrogen is reaction gas, is 720 DEG C, reaction pressure 0.5MPaG, air speed 9000h in reaction temperature-1, alcoxyl ratio is 3:1, oxygen
Under conditions of nitrogen ratio is 1:1, methane conversion 46%, the yield of ethylene is 23%.
Embodiment 3
Using fluidized bed reaction shown in FIG. 1, circulating cooling medium import 4a and outlet 8a between have two Secondary Airs into
Mouth 7a, 7b, what is be connected with secondary air inlet 7a, 7b is that totally two distribution pipes 6a, 6b, rest part are same as Example 1.Using
The catalyst granules that average grain diameter is 100 μm is 680 DEG C in reaction temperature using methane, oxygen and nitrogen as reaction gas, reaction
Pressure is 0.2MPaG, air speed 4000h-1, alcoxyl ratio is 3:1, under conditions of oxygen nitrogen ratio is 1:1, methane conversion 47%, and second
The yield of alkene is 26%.
Embodiment 4
Using fluidized bed reaction shown in FIG. 1, circulating cooling medium import 4a and outlet 8a between have two Secondary Airs into
Mouth 7a, 7b, what is be connected with secondary air inlet 7a, 7b is that totally two distribution pipes 6a, 6b, rest part are same as Example 1.Using
The catalyst granules that average grain diameter is 50 μm is 650 DEG C in reaction temperature using methane, oxygen and nitrogen as reaction gas, reaction pressure
Power is 0.8MPaG, air speed 14000h-1, alcoxyl ratio is 3:1, under conditions of oxygen nitrogen ratio is 1:1, methane conversion 48%, and second
The yield of alkene is 25%.
Claims (9)
1. a kind of fluidized bed reaction for Catalyst for Oxidative Coupling of Methane, it is characterised in that: including fluidized bed, whirlwind point
From device and heat exchanger；
Fluidized bed outermost layer has refractory material, and fluidized bed bottom end is equipped with primary air inlet and extra-air inlet, primary air inlet and fluidized bed
The distribution grid of bottom communicates, and extra-air inlet is located at bottom fluidization bed axis direction；In a fluidized bed portion be equipped with secondary air inlet and
Distribution pipe, secondary air inlet are connected with corresponding distribution pipe；
Lower part is built-in with heat exchanger tube in a fluidized bed, and heat exchanger tube is located on the inside of refractory material, has circulating cooling in heat exchanger tube bottom end
Medium entrance has circulating cooling medium outlet on heat exchanger tube top, is equipped with Secondary Air between circulating cooling medium inlet and outlet
Import；
The import of fluidized bed top export and cyclone separator connects, and the solid outlet of cyclone separator passes through dipleg and heat exchanger
It is connected, catalyst feeds is equipped on dipleg, heat exchanger bottom end is equipped with and blows port and discharge port, has heat exchange inside heat exchanger
Pipe, heat exchanger lower part are equipped with circulating cooling medium import, and heat exchanger top is exported equipped with circulating cooling medium, and heat exchanger is by returning
Expects pipe is connected with fluidized bed lower part, and refeed line is equipped with returning charge valve.
2. the fluidized bed reaction according to claim 1 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: institute
Stating distribution pipe is circular ring shape pipe, is uniformly provided with several qi-emitting holes towards the side in the center of circle in circular ring shape pipe.
3. the fluidized bed reaction according to claim 2 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: institute
4 ~ 20 qi-emitting holes are disposed in horizontal plane on the inside of the distribution pipe stated.
4. the fluidized bed reaction according to claim 1 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: institute
Secondary air inlet and distribution pipe are stated with being arranged with 1 ~ 4.
5. a kind of fluidized-bed reaction technique for Catalyst for Oxidative Coupling of Methane, described in any item using claim 1 ~ 4
Fluidized bed reaction for Catalyst for Oxidative Coupling of Methane, it is characterised in that: raw material reaction gas is from primary air inlet, secondary air inlet
Mouth and secondary air inlet are passed through in fluidized bed；Catalyst enters in pipeline from the catalyst feeds on dipleg, after heat exchanger
Into in fluidized bed, the effect of heat exchanger is to reduce the temperature of solid catalyst；Catalyst and reaction gas are in stream in fluidized bed
Simultaneously catalysis reaction occurs for state；The air-flow for carrying catalyst granules moves upwards in fluidized bed, into cyclone separator, through revolving
After wind separator gas solid separation, solid catalyst falls into dipleg, and the product gas after separation is arranged from the gas vent of cyclone separator
Out；Solid catalyst under cyclone separator separation initially enters dipleg, then is cooled down by heat exchanger, under the control of returning charge valve
Fluidized bed is returned to through refeed line, whole process circulation carries out；It will be reacted by the heat exchange effect of heat exchanger tube during the reaction
The heat generated in journey removes in time.
6. the fluidized-bed reaction technique according to claim 5 for Catalyst for Oxidative Coupling of Methane, it is characterised in that:
The raw material reaction gas for entering fluidized bed from primary air inlet, extra-air inlet, secondary air inlet is methane, oxygen, nitrogen
One of or their mixed gas.
7. the fluidized-bed reaction technique according to claim 5 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: cold
But medium includes one or both of water, water vapour mixture.
8. the fluidized-bed reaction technique according to claim 5 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: institute
The average grain diameter for stating catalyst granules is 20 ~ 200 μm.
9. the fluidized-bed reaction technique according to claim 5 for Catalyst for Oxidative Coupling of Methane, it is characterised in that: anti-
Answering temperature is 600 ~ 800 DEG C, and reaction pressure is normal pressure to 1.0MPaG, and air speed is 2000 ~ 20000h-1, alcoxyl ratio is 2:1 ~ 8:1,
Oxygen nitrogen ratio is 2:1 ~ 1:5, and methane conversion is > 40%, and the yield of ethylene is > 20%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973579A (en) * | 2021-02-07 | 2021-06-18 | 中国科学院过程工程研究所 | Gas-solid short contact time reaction device and application thereof |
| CN112973584A (en) * | 2021-02-07 | 2021-06-18 | 中国科学院过程工程研究所 | Fluidized bed reaction device and application thereof |
| CN113477191A (en) * | 2021-08-09 | 2021-10-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
| CN115155466A (en) * | 2022-08-05 | 2022-10-11 | 中国石油大学(北京) | Coupling reaction system and method for preparing ethylene through oxidative coupling of methane |
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| CN110227394A (en) * | 2019-04-24 | 2019-09-13 | 中国科学院山西煤炭化学研究所 | A kind of fluidized-bed reactor for Catalyst for Oxidative Coupling of Methane |
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| CN107129844A (en) * | 2017-06-16 | 2017-09-05 | 中国石油大学(华东) | A kind of synthesis gas fluid bed preparing natural gas by methanation technique |
| CN207552262U (en) * | 2017-11-30 | 2018-06-29 | 陕西延长石油（集团）有限责任公司 | A kind of powdered coal pressuring gasified device of double-circulating fluid bed two sections of couplings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112973579A (en) * | 2021-02-07 | 2021-06-18 | 中国科学院过程工程研究所 | Gas-solid short contact time reaction device and application thereof |
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| CN113477191A (en) * | 2021-08-09 | 2021-10-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
| CN113477191B (en) * | 2021-08-09 | 2022-03-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
| CN115155466A (en) * | 2022-08-05 | 2022-10-11 | 中国石油大学(北京) | Coupling reaction system and method for preparing ethylene through oxidative coupling of methane |
| CN115155466B (en) * | 2022-08-05 | 2023-10-13 | 中国石油大学(北京) | Coupling reaction system and method for preparing ethylene by oxidative coupling of methane |
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Application publication date: 20190820 |