WO2010074762A1 - Systems and methods to remove liquid product and fines from a slurry reactor - Google Patents
Systems and methods to remove liquid product and fines from a slurry reactor Download PDFInfo
- Publication number
- WO2010074762A1 WO2010074762A1 PCT/US2009/006708 US2009006708W WO2010074762A1 WO 2010074762 A1 WO2010074762 A1 WO 2010074762A1 US 2009006708 W US2009006708 W US 2009006708W WO 2010074762 A1 WO2010074762 A1 WO 2010074762A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slurry
- catalyst
- liquid
- reactor
- bed
- Prior art date
Links
Classifications
-
- 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
- B01J8/005—Separating solid material from the gas/liquid stream
- B01J8/0055—Separating solid material from the gas/liquid stream using cyclones
-
- 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
- B01J8/005—Separating solid material from the gas/liquid stream
-
- 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
- B01J8/005—Separating solid material from the gas/liquid stream
- B01J8/0065—Separating solid material from the gas/liquid stream by impingement against stationary members
-
- 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
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
- B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
- B01J8/224—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement
- B01J8/226—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement internally, i.e. the particles rotate within the vessel
-
- 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
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
- B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
- B01J8/224—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement
- B01J8/228—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement externally, i.e. the particles leaving the vessel and subsequently re-entering it
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
- C10G2/30—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
- C10G31/09—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by filtration
-
- 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
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00823—Mixing elements
- B01J2208/00831—Stationary elements
- B01J2208/0084—Stationary elements inside the bed, e.g. baffles
Definitions
- the present invention relates generally to the separation of either catalyst, reaction product or both in a three-phase liquid slurry process. More particularly, the present invention is concerned with the use of such systems and methods in a process for the synthesis of hydrocarbons in which a mixture of hydrogen and carbon monoxide are contacted with a slurry of catalyst particles in a liquid in a three-phase slurry reactor.
- Three-phase slurry processes are widely reported in scientific literature and, hence, are well known to those skilled in the art.
- An example of such a three-phase slurry process is the production of hydrocarbons by means of the Fischer-Tropsch process.
- a Fischer-Tropsch hydrocarbon synthesis process is conducted by contacting a stream of synthesis gas (comprising H2 and CO) with a liquid suspension of solid catalyst.
- the synthesis gas generally will have a H2/CO molar ratio of from 1 : 1 to 3: 1.
- the dispersing liquid is primarily linear hydrocarbon reaction product.
- the gas is fed into the bottom of the bubble column through a gas distributor that produces small gas bubbles.
- slurry phase processes are conducted under conditions sufficient to prevent slumping of the bed, that is, under conditions that prevent catalyst particles from accumulating near the bottom of the bubble column.
- the settling tendency of the catalyst particles is opposed by dispersion forces created by the rising gas bubbles from the gas fed into the bottom of the bubble column.
- liquid products are continuously or periodically removed from the reactor. In doing so, however, it is important to separate dispersed catalyst particles from the liquid being removed to maintain a constant inventory of catalyst in the reactor.
- the separation is conducted in a filtration zone located inside the slurry bed.
- the filtration zone typically comprises cylindrical filtering media through which liquid product passes from the exterior to the interior of the filtering media where it is collected and removed from the reactor.
- liquid product is filtered in an external filtration system.
- the present invention provides methods and means for separating slurry liquid from catalyst in a three-phase slurry process.
- the embodiments of the invention are characterized by conducting the three-phase process under conditions to provide an upper region in the slurry bed where the concentration of the solids in the slurry is less than about 20 wt%.
- a portion of the three-phase slurry in the upper region is degassed and passed to liquid-solid separation devices other than filters.
- the slurry process is operated in a slumped- bed mode, thereby providing an upper region in the slurry bed where the slurry solids concentration is less than about 20 wt% of solids.
- Figure 1 is a schematic diagram illustrating an embodiment of the invention.
- Figure 2 is a partial schematic diagram illustrating use of an alternate separator in the practice of the invention.
- Figure 3 represents a preferred embodiment of the invention in which the slurry reactor is provided with an external downcomer for removal of degassed slurry for separation according to the invention.
- Figure 4 is a partial schematic diagram representing yet another alternate embodiment of the invention.
- Figure 5 is a graph showing the slurry catalyst loading versus bed height when operating in a slumped bed mode and a dispersed bed mode.
- the present invention is applicable to chemical reactions which are carried out in a three-phase slurry reactor.
- a specific example of such reactions is the Fischer-Tropsch synthesis process, and for convenience, the invention will be described by specific reference to the Fischer-Tropsch hydrocarbon synthesis process.
- the reactor for a Fischer-Tropsch synthesis process conducted according to the present invention comprises a vertical vessel for containing a catalyst suspended in a liquid phase through which synthesis gas is bubbled.
- the synthesis gas comprises H2 and CO in the molar ratio of from about 1 : 1 to about 3: 1. In the present process, the ratio preferably is 2.1 : 1.
- any catalyst capable of being active in the Fischer-Tropsch reaction can be used in the present invention.
- the catalyst will comprise effective amounts of Co and one or more of Re, Ru, Fe, Ni, Th, Zr, Hf, U, Mg and La on a suitable inorganic support material.
- Those linear hydrocarbon reaction products that are liquids at reaction conditions comprise the slurry liquid in the reactor.
- the Fischer-Tropsch reaction is carried out at temperatures in the range of about 32O 0 F to 85O 0 F and pressures in the range of 80 to 600 psi.
- the synthesis gas is injected at or near the bottom of the reactor at a superficial gas velocity sufficient to overcome the settling velocity of catalyst particles.
- the synthesis gas is injected at or near the bottom of the reactor at a superficial velocity sufficient to provide a non-homogeneous slurry having an upper region and a lower region.
- the catalyst concentration in the upper region of the slurry bed will contain less than about 20 wt% of catalyst solids, preferably the solids concentration in the slurry will be less than 10 wt%, and most preferably the solids concentration will be less than 5 wt%.
- Figure 5 shows two examples of the slumped bed operation where the solids concentration in the upper region of the bed range between about 20 wt% and about 1 wt% catalyst solids.
- the catalyst concentration profile along the reactor height in the slurry bed will depend, of course, not only on the gas velocity but also on the catalyst particle size, particle density, total loading of the catalyst, the height and diameter of the reactor, and the slurry liquid density and viscosity.
- the catalyst particle size refers to the effective catalyst particle diameter.
- the bulk catalyst refers to catalyst particles having an average size greater than or equal to about 10 microns, for example, in the range of about 10 to 150 microns.
- fines is meant particles having a particle size below about 10 microns, for example, in the range of about 0.1 to 10 microns.
- the Fischer-Tropsch is operated in a slumped-bed mode.
- this is achieved by using a reactor without internal downcomers and injecting the synthesis operating gas at or near the bottom of the reactor at a superficial gas velocity sufficient that the catalyst concentration in the upper region of the slurry is less than about 20 wt% solids.
- the slumped-bed operation is achieved using a reactor that is provided with internal downcomers for circulating slurry in the reactor. These downcomers are sized and positioned in the reactor so that under operating conditions the concentration of catalyst solids in the slurry in the upper region of the slurry bed is less than about 20 wt%.
- liquid in the upper region of the slurry containing less than about 20 wt% solids is degassed and passed to a liquid- solids separation device for separation of bulk solids.
- the bulk catalyst particles that are separated from the liquid are returned at or near the bottom of the reactor.
- the liquid separated may be subjected to a second-stage separation step for removal of fines and the liquid product may be sent for further processing, if needed.
- FIG. 1 shows a reactor vessel 10 containing a slurry liquid 11 which has an upper region 12 and a lower region 14.
- Vessel 10 includes a gas head space 15 and a gas distributor 16.
- Conduit means is provided for injecting synthesis gas into the slurry liquid for reaction therein.
- Conduit means 18 is provided for removing gaseous products from head space 15.
- Vessel 10 includes a gas disengaging zone 19 located in region 12. As shown in Figure 1 , the gas disengaging zone 19 is in the form of a cup-like top 20 on downcomer 21.
- Conduit means 22 is provided for removing degassed slurry for transfer to a liquid-solid separation device 23.
- separator 23 is shown representing an inclined plate separator other solid liquid separators may be used.
- Conduit means 25 is provided for returning bulk catalyst particles to the bottom region of the slurry liquid.
- Conduit 26 is provided for removing slurry liquid for the separation of catalyst fines in a second separation stage and for other processing as
- vessel 10 may include downcomers that do not span the entire length of slurry bed 1 1 and are located in the lower region 14 for circulating catalyst at the bottom of the reactor.
- Downcomer 27, shown in Figure 1 represents one such downcomer.
- vessel 10 does not require internal filters for removing product, internal filters (not shown) may be used.
- a hydroclone 29 is used to separate the solids from the liquid.
- degassed slurry is transferred via conduit 22 to hydroclone 29, which separates the slurry stream into an overflow stream and a catalyst-containing underflow stream.
- the slurry liquid overflow stream is removed via conduit 26 for the separation of catalyst fines in a second separation stage and for other processing as required.
- the bulk catalyst is returned to the bottom region of the slurry liquid via conduit 25.
- degassed slurry is withdrawn from the main vertical section 30 of an external downcomer via line 31 for separation in a liquid-solid separation device 32, such as an inclined plate separator or a hydroclone. Liquid is removed via line 33 for fines separation and any additional processing while bulk catalyst is returned to the slurry reactor via line 34.
- a liquid-solid separation device 32 such as an inclined plate separator or a hydroclone. Liquid is removed via line 33 for fines separation and any additional processing while bulk catalyst is returned to the slurry reactor via line 34.
- the slurry can be withdrawn, as shown in Figure 4, from the main vertical section 21 of an internal downcomer for separation and further treatment similar to that shown in Figure 3.
- the liquids-solids separation is simplified. Indeed, the present invention makes it possible to eliminate the use of filters to separate solids from the liquid removed from the slurry bubble column. This is done by reducing the solids concentration in the slurry sent to liquid-solids separation.
- a computer model of the slurry reactor system was used to illustrate the solid catalyst distribution in a slurry bed as a function of slurry bed height.
- the model couples reaction kinetics with slurry bubble hydrodynamics.
- the model was provided with the feed composition, reaction temperature and pressure, the catalyst type, density and particle size distribution, and the reactor geometry.
- the catalyst concentration for both a slumped bed operation and a dispersed bed operation was determined and shown graphically in Figure 5. As can be seen, operating in a slumped bed mode is capable of achieving much less than about 20 wt% catalyst concentration as the reactor height increases. The same effect can also be achieved by decreasing the reactor downcomer height. As can be seen in Figure 5, the slurry catalyst concentration in a dispersed bed operation starts to decrease rapidly once the slurry level is above the downcomer height, which in this example is 66 feet.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009330672A AU2009330672B2 (en) | 2008-12-23 | 2009-12-23 | Systems and methods to remove liquid product and fines from a slurry reactor |
CN200980154987.XA CN102292416B (en) | 2008-12-23 | 2009-12-23 | Systems and methods to remove liquid product and fines from a slurry reactor |
EP09796162A EP2379675A1 (en) | 2008-12-23 | 2009-12-23 | Systems and methods to remove liquid product and fines from a slurry reactor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20352508P | 2008-12-23 | 2008-12-23 | |
US61/203,525 | 2008-12-23 | ||
US12/592,168 US8119014B2 (en) | 2008-12-23 | 2009-11-20 | Systems and methods to remove liquid product and fines from a slurry reactor |
US12/592,168 | 2009-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010074762A1 true WO2010074762A1 (en) | 2010-07-01 |
Family
ID=42267045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/006708 WO2010074762A1 (en) | 2008-12-23 | 2009-12-23 | Systems and methods to remove liquid product and fines from a slurry reactor |
Country Status (5)
Country | Link |
---|---|
US (1) | US8119014B2 (en) |
EP (1) | EP2379675A1 (en) |
CN (1) | CN102292416B (en) |
AU (1) | AU2009330672B2 (en) |
WO (1) | WO2010074762A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103170284A (en) * | 2013-04-03 | 2013-06-26 | 神华集团有限责任公司 | Fischer-Tropsch synthesis system and process of high-temperature and high-pressure slurry bed reactor |
CN107720959A (en) * | 2017-11-23 | 2018-02-23 | 青岛理工大学 | Gas-liquid-solid three-phase separator |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8389585B2 (en) * | 2009-02-13 | 2013-03-05 | Exxonmobil Research And Engineering Company | Slurry reactor fines segregation and removal |
US8894939B2 (en) * | 2010-08-16 | 2014-11-25 | Emerging Fuels Technology, Inc. | Three phase reactor |
CN102773050B (en) * | 2012-08-14 | 2014-05-28 | 迈瑞尔实验设备(上海)有限公司 | Structure and method for solid-liquid separation and circulation |
CN103977747B (en) * | 2013-02-08 | 2018-01-30 | 上海碧科清洁能源技术有限公司 | Paste state bed reactor and the method that slurry reactor is carried out with the paste state bed reactor |
WO2014121722A1 (en) * | 2013-02-08 | 2014-08-14 | Shanghai Bi Ke Clean Energy Technology Co., Ltd. | A slurry-bed reactor and method of use |
CN103263790A (en) * | 2013-04-27 | 2013-08-28 | 北京市环境卫生设计科学研究所 | Three-phase separation method for household refuse and ventilation blast cap |
CN104549064A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Slurry bed reactor and applications thereof |
EA033413B1 (en) * | 2015-08-19 | 2019-10-31 | Sasol Tech Pty Ltd | Method of operating a slurry bubble column reactor |
EP3235560A1 (en) * | 2016-04-22 | 2017-10-25 | Evonik Röhm GmbH | Method for performing a heterogeneously catalysed reaction |
CN111036150B (en) * | 2019-12-02 | 2023-07-25 | 河南金鹏化工有限公司 | Thiodicarb alcohol washing continuous production process and device |
CN111905659B (en) * | 2020-08-24 | 2022-04-19 | 中国科学院青岛生物能源与过程研究所 | Method and device for extracting cleaning liquid from slurry bed |
EP4371660A1 (en) * | 2022-11-21 | 2024-05-22 | Röhm GmbH | Method for preparing a catalyst for the production of methyl methacrylate using clarification |
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US5900159A (en) * | 1996-02-29 | 1999-05-04 | Shell Oil Company | Method for separating liquid from a slurry |
US6068760A (en) * | 1997-08-08 | 2000-05-30 | Rentech, Inc. | Catalyst/wax separation device for slurry Fischer-Tropsch reactor |
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2009
- 2009-11-20 US US12/592,168 patent/US8119014B2/en active Active
- 2009-12-23 CN CN200980154987.XA patent/CN102292416B/en not_active Expired - Fee Related
- 2009-12-23 AU AU2009330672A patent/AU2009330672B2/en not_active Ceased
- 2009-12-23 WO PCT/US2009/006708 patent/WO2010074762A1/en active Application Filing
- 2009-12-23 EP EP09796162A patent/EP2379675A1/en not_active Withdrawn
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US6068760A (en) * | 1997-08-08 | 2000-05-30 | Rentech, Inc. | Catalyst/wax separation device for slurry Fischer-Tropsch reactor |
US6096789A (en) * | 1998-04-23 | 2000-08-01 | Agip Petroli S.P.A. | Process for the preparation of hydrocarbons from synthesis gas |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103170284A (en) * | 2013-04-03 | 2013-06-26 | 神华集团有限责任公司 | Fischer-Tropsch synthesis system and process of high-temperature and high-pressure slurry bed reactor |
CN107720959A (en) * | 2017-11-23 | 2018-02-23 | 青岛理工大学 | Gas-liquid-solid three-phase separator |
CN107720959B (en) * | 2017-11-23 | 2020-08-04 | 青岛理工大学 | Gas-liquid-solid three-phase separator |
Also Published As
Publication number | Publication date |
---|---|
CN102292416A (en) | 2011-12-21 |
EP2379675A1 (en) | 2011-10-26 |
US8119014B2 (en) | 2012-02-21 |
AU2009330672A1 (en) | 2011-07-21 |
AU2009330672B2 (en) | 2014-11-27 |
CN102292416B (en) | 2014-04-16 |
US20100160460A1 (en) | 2010-06-24 |
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