WO1995023762A1 - Method of extracting high-grade activated carbon from reeds and/or straw - Google Patents

Method of extracting high-grade activated carbon from reeds and/or straw Download PDF

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Publication number
WO1995023762A1
WO1995023762A1 PCT/AT1995/000041 AT9500041W WO9523762A1 WO 1995023762 A1 WO1995023762 A1 WO 1995023762A1 AT 9500041 W AT9500041 W AT 9500041W WO 9523762 A1 WO9523762 A1 WO 9523762A1
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Prior art keywords
activated carbon
catalyst
raw material
straw
reeds
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Application number
PCT/AT1995/000041
Other languages
German (de)
French (fr)
Inventor
Thomas Perlaky
Peter Panning
Bruno Hillinger
Original Assignee
Bfb-Burgenländische Forschungs-, Entwicklungs- Und Betriebsgesellschaft Für Biomassenutzung Gesellschaft M.B.H.
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Application filed by Bfb-Burgenländische Forschungs-, Entwicklungs- Und Betriebsgesellschaft Für Biomassenutzung Gesellschaft M.B.H. filed Critical Bfb-Burgenländische Forschungs-, Entwicklungs- Und Betriebsgesellschaft Für Biomassenutzung Gesellschaft M.B.H.
Priority to AU18005/95A priority Critical patent/AU1800595A/en
Publication of WO1995023762A1 publication Critical patent/WO1995023762A1/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C01B32/336—Preparation characterised by gaseous activating agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C01B32/318—Preparation characterised by the starting materials
    • C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor

Definitions

  • the invention relates to a novel method for obtaining high-quality activated carbon from reeds and / or straw combined with the extraction of methanol and wood vinegar by using the method according to the invention.
  • Activated carbon for use in the chemical industry is obtained in large quantities from various organic substances, such as lignite, peat, coconut shells and other biomass.
  • Activation by water vapor, CO 2 or other gases, the surface, the pore size and certain chemical properties can be influenced to a certain extent by appropriate process control.
  • the object of the present invention is to provide a method which is improved compared to the known methods.
  • This object is achieved according to the invention by a process for producing activated carbon from reeds and / or straw, in which the raw material is degassed in the first substep at a temperature of 180 to 250 ° C. and zeolites are used as catalysts.
  • the process according to the invention differs from the known process control in that the temperature range during the first outgassing phase, which begins at approx. 180 ° C, until the outgassing of the volatile components is complete.
  • the raw material is mixed with a catalytically active zeolite granulate, which increases the formation of methanol at the expense of the resulting wood vinegar and other components.
  • the use of zeolites as catalysts increases the yield of methanol and activated carbon considerably compared to known processes.
  • the granules of the catalyst granules are preferably selected so that they are screened out of the raw material and added to the new raw material before leaving the outgassing phase, so that the catalyst can be used again and repeatedly in the process.
  • the zeolite granules used as a catalyst preferably have a grain size of up to about 5 to 10 mm.
  • the organic raw material and the catalyst material are mixed in a suitable ratio and fed to a rotary kiln in premixed form.
  • the suitable ratio depends of course on the respective starting materials, the proportion of catalyst material is generally in the range of up to about 10%.
  • the raw material is subjected to a further smoldering process, which begins at 400 ° C and ends at approx. 750 ° C.
  • the raw material reaches the level of tar-free charcoal.
  • the charcoal is then introduced into the activation zone, where - depending on the silicate content of the raw material - it is converted to activated carbon with CO 2 and / or CO and / or water vapor.
  • the C0 2 or CO from the exhaust gas used for heating as well as the water vapor from the fuel cell system are used partly or entirely as activation media.
  • Shaft furnaces, fluidized bed furnaces and rotary tube furnaces are used as reactors.
  • an activated carbon quality with a surface area of 1100 to 1600 m 2 / g can be achieved, the pore distribution also being achieved in accordance with the specifications. This cannot be achieved with the known method with the raw materials reed and / or straw.
  • the methanol (up to 12% of the dry biomass compared to approx. 3% according to the known methods), which can be easily separated and purified from the other components of the carbonization gas by fractional condensation, is used in a preferred embodiment in fuel cells, such as e.g. used by Siemens ("multi-stitch process") to generate electricity. In this way, the electricity requirements of the system can be covered and electricity can still be supplied to the outside world.
  • the low-temperature outgassing step increases the yield of activated carbon by up to 15% and reduces the energy requirement by approx. 10%.
  • FIG. 1 shows a schematic representation of the system described in the example for carrying out the method according to the invention.
  • the dried and ground raw material with the catalyst granulate is fed via the silo (1) and the rotary valve (2) into the rotary kiln (4) by means of the feed screw (3). This is covered with the coat Hot gas (5) heated, the raw material temperature being kept between 180 and 250 ° C. The volatile components outgas and the catalyst promotes maximum methanol formation.
  • the raw material is removed from the rotary kiln (4) by means of lifting blades and sieve drum (6) and the catalyst is separated off and remains in the rotary kiln (4).
  • the raw material goes into the high temperature range (7).
  • the carbonization gas (13) is drawn off through the hollow axis of the feed screw (3) and brought to the fractionation (14). Here the different components of the carbonization gas are obtained separately.
  • the volatile part is burned together with the exhaust gases (17, 18).
  • the hot gas (5) is used to heat the rotary kilns (4,7) via their jacket.
  • the exhaust gas (17) goes through the de-targing (17a) beforehand. The combustion takes place in the burner (19).
  • the charcoal from the high-temperature area (7) is fed to the rotary kiln (9) for activation by means of a feed screw (8).
  • the heating takes place electrically (10), whereby the charcoal is heated to approx. 1000 ° C. C0 2 (16), the exhaust gas used (16) from the burner (19), and steam (20), the exhaust steam from the fuel cell (15) are used as activation media.
  • the finished activated carbon (12) is cooled in a cooler (11) and fed to the final processing.
  • the methanol from the fractionation (14) is fed to the fuel cell (15) and this supplies the electricity for operating the plant.
  • the surplus goes on the net.

Abstract

The method according to the invention is used to produce high-grade activated carbon from reeds and/or straw. The composition of the low temperature carbonization gas, the gas evolution and the quality and amount of activated carbon are considerably influenced by special low temperature carbonization in the first method stage and the addition of catalysts. A very good energy balance is attained by the use of a fuel cell system.

Description

Verfahren zur Gewinnung von hochwertiger Aktivkohle aus Schilf und/oder StrohProcess for the extraction of high quality activated carbon from reeds and / or straw
Gegenstand der Erfindung ist ein neuartiges Verfahren zur Ge¬ winnung hochwertiger Aktivkohle aus Schilf und/oder Stroh kombiniert mit einer Gewinnung von Methanol und Holzessig durch die Anwendung des erfindungsgemäßen Verfahrens.The invention relates to a novel method for obtaining high-quality activated carbon from reeds and / or straw combined with the extraction of methanol and wood vinegar by using the method according to the invention.
Aktivkohle für die Anwendung in der chemischen Industrie (Schad- stoffabsorption aus Gasen und Flüssigkeiten, für Reinigungsver¬ fahren, als Katalysatorträger, für medizinische Anwendung und andere Zwecke) wird in großer Menge aus verschiedenen organischen Stoffen gewonnen, wie etwa Lignit, Torf, Kokosschalen und anderen Biomassen.Activated carbon for use in the chemical industry (absorption of pollutants from gases and liquids, for cleaning processes, as a catalyst support, for medical use and other purposes) is obtained in large quantities from various organic substances, such as lignite, peat, coconut shells and other biomass.
Die gängigen Verfahren zur Ezeugung von Aktivkohle bestehen aus folgenden Teilschritten;The common processes for the production of activated carbon consist of the following sub-steps;
1. Trocknen und Vermählen des Rohmaterials1. Drying and grinding the raw material
2. Verschwelen bzw. trockene Destillation bei ca. 400°-450°C2. Smoldering or dry distillation at approx. 400 ° -450 ° C
3. Weitere thermische Behandlung bei 700°-900°C3. Further thermal treatment at 700 ° -900 ° C
4. Aktivierung durch Wasserdampf, C02 oder andere Gase, wobei durch entsprechende Verfahrensführung die Oberfläche, die Porenweite und bestimmte chemische Eigenschaften (z.B. hydrophil, hydrophob oder andere) bis zu einem gewissen Grad beeinflußt werden können.4. Activation by water vapor, CO 2 or other gases, the surface, the pore size and certain chemical properties (eg hydrophilic, hydrophobic or other) can be influenced to a certain extent by appropriate process control.
Die Aufgabe der vorliegenden Erfindung besteht darin, ein gegenüber den bekannten Verfahren verbessertes Verfahren zu Verfügung zu stellen.The object of the present invention is to provide a method which is improved compared to the known methods.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren zur Erzeugung von Aktivkohle aus Schilf und/oder Stroh gelöst, bei welchem die Entgasung des Rohstoffes im ersten Teilschritt bei einer Temperatur von 180 bis 250°C erfolgt und Zeolithe als Katalysator eingesetzt werden.This object is achieved according to the invention by a process for producing activated carbon from reeds and / or straw, in which the raw material is degassed in the first substep at a temperature of 180 to 250 ° C. and zeolites are used as catalysts.
Das erfindungsgemäße Verfahren unterscheidet sich von der bekannten Verfahrensführung dadurch, daß der Temperaturbereich bei der ersten Ausgasungsphase, welche bei ca. 180°C beginnt, solange aufrecht erhalten wird, bis die Ausgasung der leicht flüchtigen Komponenten abgeschlossen ist. Außerdem wird das Rohmaterial mit einem katalytisch wirkenden Zeolithgranulat vermischt, welches die Methanolbildung auf Kosten des entstehenden Holzessigs und anderer Komponenten vermehrt. Durch den Einsatz von Zeolithen als Katalysatoren wird die Ausbeute an Methanol und Aktivkohle erheblich gegenüber bekannten Verfahren gesteigert. Die Körnung des Katalysatorgranulates wird dabei vorzugsweise so gewählt, daß dieser vor Verlassen der Ausgasungsphase aus dem Rohmaterial abgesiebt und dem neuen Rohmaterial zugegeben wird, so daß der Katalysator erneut und in wiederholter Weise im Verfahren verwendet werden kann. Die als Katalysator verwendeten Zeolithgranulate haben vorzugsweise eine Korngröße bis zu etwa 5 bis 10 mm.The process according to the invention differs from the known process control in that the temperature range during the first outgassing phase, which begins at approx. 180 ° C, until the outgassing of the volatile components is complete. In addition, the raw material is mixed with a catalytically active zeolite granulate, which increases the formation of methanol at the expense of the resulting wood vinegar and other components. The use of zeolites as catalysts increases the yield of methanol and activated carbon considerably compared to known processes. The granules of the catalyst granules are preferably selected so that they are screened out of the raw material and added to the new raw material before leaving the outgassing phase, so that the catalyst can be used again and repeatedly in the process. The zeolite granules used as a catalyst preferably have a grain size of up to about 5 to 10 mm.
Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens werden der organische Rohstoff und das Katalysatormaterial in einem geeigneten Verhältnis gemischt und in vorgemischter Form einem Drehrohrofen zugeführt. Das geeignete Verhältnis richtet sich natürlich nach den jeweiligen Ausgangsmaterialien, der Anteil an Katalysatormaterial liegt im allgemeinem im Bereich von bis zu etwa 10 %.In a preferred embodiment of the process according to the invention, the organic raw material and the catalyst material are mixed in a suitable ratio and fed to a rotary kiln in premixed form. The suitable ratio depends of course on the respective starting materials, the proportion of catalyst material is generally in the range of up to about 10%.
Als nächste Stufe wird das Rohmaterial einer weiteren Verschwelung unterworfen, welche bei 400°C beginnt und bei ca. 750°C beendet wird. Das Rohmaterial erreicht dabei die Stufe einer teerfreien Holzkohle. Die Holzkohle wird dann nun in die Aktivierungszone eingebracht, wo es - je nach Silikatgehalt des Rohmaterials - mit C02 und/oder CO und/oder Wasserdampf zu Aktivkohle umgewandelt wird.As a next step, the raw material is subjected to a further smoldering process, which begins at 400 ° C and ends at approx. 750 ° C. The raw material reaches the level of tar-free charcoal. The charcoal is then introduced into the activation zone, where - depending on the silicate content of the raw material - it is converted to activated carbon with CO 2 and / or CO and / or water vapor.
Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens werden als Aktivierungsmedien teilweise oder zur Gänze das C02 bzw. CO aus dem zur Heizung verwendeten Abgas sowie der Wasserdampf aus der Brennstoffzellenanlage verwendet.In a preferred embodiment of the method according to the invention, the C0 2 or CO from the exhaust gas used for heating as well as the water vapor from the fuel cell system are used partly or entirely as activation media.
Die Energiebilanz für diese Verfahren gestaltet sich daher in der Weise, daß die Schwelgase, welche noch einen beträchtlichen Energieinhalt haben, für die Beheizung der Reaktoren und die Erzeugung des Wasserdampfes Verwendung finden, so daß im wesentlichen keine Energie von außen zugeführt werden muß.The energy balance for these processes is therefore such that the carbonization gases, which are still considerable Have energy content for heating the reactors and generating steam, so that essentially no energy has to be supplied from the outside.
Als Reaktoren finden Schachtöfen, Wirbelschichtöfen und Dreh¬ rohröfen Verwendung.Shaft furnaces, fluidized bed furnaces and rotary tube furnaces are used as reactors.
Mit dem erfindungsgemäßen Verfahren kann eine Aktivkohlequalität mit einer Oberfläche von 1100 bis 1600 m2/g erzielt werden, wobei auch die Porenverteilung entsprechend den Vorgaben erreicht wird. Dies ist mit dem bekannten Verfahren mit den Rohstoffen Schilf und/oder Stroh nicht erreichbar.With the method according to the invention, an activated carbon quality with a surface area of 1100 to 1600 m 2 / g can be achieved, the pore distribution also being achieved in accordance with the specifications. This cannot be achieved with the known method with the raw materials reed and / or straw.
Das Methanol (bis zu 12% der trockenen Biomasse gegenüber ca. 3% nach den bekannten Verfahren) , welches durch fraktionierte Kondensation von den anderen Komponenten des Schwelgases leicht abgetrennt und gereinigt werden kann, wird gemäß einer bevorzugten Ausführungsform in Brennstoffzellen, wie z.B. von der Fa. Siemens ( "Vielstich - Verfahren") zur Stromerzeugung eingesetzt. So kann der Elektrizitätsbedarf der Anlage gedeckt und noch Strom nach außen abgegeben werden.The methanol (up to 12% of the dry biomass compared to approx. 3% according to the known methods), which can be easily separated and purified from the other components of the carbonization gas by fractional condensation, is used in a preferred embodiment in fuel cells, such as e.g. used by Siemens ("multi-stitch process") to generate electricity. In this way, the electricity requirements of the system can be covered and electricity can still be supplied to the outside world.
Durch den Niedertemperatur-Ausgasungsschritt wird die Ausbeute an Aktivkohle um bis zu 15% erhöht und der Energiebedarf um ca. 10% gesenkt.The low-temperature outgassing step increases the yield of activated carbon by up to 15% and reduces the energy requirement by approx. 10%.
Die Erfindung wird im Beispiel und in der Zeichnungsfigur, auf die sie jedoch nicht beschränkt sein soll, noch näher erläutert.The invention is explained in more detail in the example and in the drawing figure, to which, however, it should not be limited.
Es zeigt: Fig.l eine schematische Darstellung der im Beispiel geschilderten Anlage zur Durchführung des erfindungsgemäßen Verfahrens.1 shows a schematic representation of the system described in the example for carrying out the method according to the invention.
Beispiel:Example:
Der getrocknete und gemahlene Rohstoff mit dem Katalysatorgranulat wird über den Silo ( 1 ) und die Zellradschleuse (2 ) in den Drehrohrofen (4) mittels Zuteilschnecke (3) aufgegeben. Dieser wird über den Mantel mit Heißgas (5) beheizt, wobei die Rohstofftemperatur zwischen 180 und 250°C gehalten wird. Dabei gasen die leicht flüchtigen Komponenten aus und durch den Katalysator wird eine maximale Methanolbildung gefördert.The dried and ground raw material with the catalyst granulate is fed via the silo (1) and the rotary valve (2) into the rotary kiln (4) by means of the feed screw (3). This is covered with the coat Hot gas (5) heated, the raw material temperature being kept between 180 and 250 ° C. The volatile components outgas and the catalyst promotes maximum methanol formation.
Mittels Hubschaufeln und Siebtrommel ( 6) wird der Rohstoff aus dem Drehrohrofen (4) ausgetragen und der Katalysator abgeschieden und verbleibt dieser im Drehrohrofen (4) . Der Rohstoff geht in den Hochtemperaturbereich (7) .The raw material is removed from the rotary kiln (4) by means of lifting blades and sieve drum (6) and the catalyst is separated off and remains in the rotary kiln (4). The raw material goes into the high temperature range (7).
Das Schwelgas (13) wird durch die hohle Achse Zuteilschnecke (3) abgezogen und zur Fraktionierung (14) gebracht. Hier werden die verschiedenen Komponenten des Schwelgases getrennt gewonnen. Der flüchtige Anteil wird zusammen mit den Abgasen (17,18) gemeinsam verbrannt. Das Heißgas (5) dient zur Beheizung der Drehrohröfen (4,7) über deren Mantel. Das Abgas (17) geht vorher noch durch die Entteerung (17a). Die Verbrennung erfolgt im Brenner (19).The carbonization gas (13) is drawn off through the hollow axis of the feed screw (3) and brought to the fractionation (14). Here the different components of the carbonization gas are obtained separately. The volatile part is burned together with the exhaust gases (17, 18). The hot gas (5) is used to heat the rotary kilns (4,7) via their jacket. The exhaust gas (17) goes through the de-targing (17a) beforehand. The combustion takes place in the burner (19).
Die Holzkohle aus dem Hochtemperaturbereich (7) wird mittels Eintragsschnecke (8 ) dem Drehrohrofen (9 ) zur Aktivierung zuge¬ führt. Die Heizung erfolgt elektrisch (10), wobei die Holzkohle auf ca. 1000°C erhitzt wird. Als Aktivierungsmedien werden C02 (16), das benutzte Abgas (16) aus dem Brenner (19), sowie Wasserdampf (20) der Abdampf aus der Brennstoffzelle (15) verwendet. Die fertige Aktivkohle (12) wird in einem Kühler (11) abgekühlt und der Endverarbeitung zugeführt.The charcoal from the high-temperature area (7) is fed to the rotary kiln (9) for activation by means of a feed screw (8). The heating takes place electrically (10), whereby the charcoal is heated to approx. 1000 ° C. C0 2 (16), the exhaust gas used (16) from the burner (19), and steam (20), the exhaust steam from the fuel cell (15) are used as activation media. The finished activated carbon (12) is cooled in a cooler (11) and fed to the final processing.
Das Methanol aus der Fraktionierung (14) wird der Brennstoffzelle (15) zugeführt und diese liefert den Strom zum Betrieb der Anlage. Der Überschuß geht ins Netz. The methanol from the fractionation (14) is fed to the fuel cell (15) and this supplies the electricity for operating the plant. The surplus goes on the net.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur Erzeugung von Aktivkohle aus Schilf und/oder Stroh, dadurch gekennzeichnet, daß die Entgasung des Rohstoffes im ersten Teilschritt bei einer Temperatur von 180-250°C erfolgt und die Methanol- bzw. Aktivkohleausbeute durch den Einsatz von Zeolithen als Katalysator gesteigert wird.1. A process for the production of activated carbon from reeds and / or straw, characterized in that the degassing of the raw material takes place in the first sub-step at a temperature of 180-250 ° C and the methanol or activated carbon yield is increased by the use of zeolites as a catalyst becomes.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der organische Rohstoff und das Katalysatormaterial in einem Verhältnis von bis zu 10 % an Katalysatormaterial vermischt und in vorgemischter Form einem Drehrohrofen (4) zugeführt werden.2. The method according to claim 1, characterized in that the organic raw material and the catalyst material are mixed in a ratio of up to 10% of catalyst material and fed to a rotary kiln (4) in premixed form.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die als Katalysator verwendeten Zeolithgranulate eine Korngröße haben, die ihre Abscheidung vom Rohstoff nach dem ersten Teilschritt mittels Siebung ermöglicht, vorzugsweise bis zu etwa 5 bis 10 mm, so daß der Katalysator wieder im Verfahren verwendet werden kann.3. The method according to claim 1 or 2, characterized in that the zeolite granules used as a catalyst have a grain size which enables their separation from the raw material after the first sub-step by means of sieving, preferably up to about 5 to 10 mm, so that the catalyst again in Procedure can be used.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß durch die hohe Methanolausbeute mit diesem Methanol eine Brennstoffzellenanlage betrieben wird, welche den Eigenstrombedarf deckt und auch Strom ins Netz liefert.4. The method according to any one of claims 1 to 3, characterized in that a fuel cell system is operated with this methanol due to the high yield of methanol, which covers the self-consumption and also supplies electricity to the network.
5. Verfahren nach Anspruch 1 und 4, dadurch gekennzeichnet, daß als Aktivierungsmedien das C02 aus dem zur Heizung der Dreh¬ rohröfen verwendete Abgas (16) sowie der Wasserdampf aus der Brennstoffzellenanlage (15) teilweise oder zur Gänze verwendet wird. 5. The method according to claim 1 and 4, characterized in that the C0 2 from the exhaust gas used for heating the rotary tube furnaces (16) and the water vapor from the fuel cell system (15) is used partially or entirely as activation media.
PCT/AT1995/000041 1994-03-01 1995-03-01 Method of extracting high-grade activated carbon from reeds and/or straw WO1995023762A1 (en)

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WO2017162914A1 (en) * 2016-03-23 2017-09-28 Valmet Technologies Oy Method and system for hydrothermal production of activated carbon
CN109704334A (en) * 2019-03-13 2019-05-03 南京工业大学 A kind of preparation method of lignin-base meso-porous carbon material
WO2019104382A1 (en) 2017-11-30 2019-06-06 The University Of Adelaide Apparatus and method of producing activated carbon material

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DD238162A3 (en) * 1979-01-22 1986-08-13 Klaus Kossatz METHOD FOR OPERATING AN APPARATUS FOR PRODUCING WOOD COAL, COKE, OR ACTIVE COAL IN A BAY PLATE

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Publication number Priority date Publication date Assignee Title
US20100069507A1 (en) * 2007-04-04 2010-03-18 Sony Corporation Porous Carbon Materials and Production Process Thereof, and Adsorbents, Masks, Adsorbing Sheets and Carriers
US10714750B2 (en) * 2007-04-04 2020-07-14 Sony Corporation Porous carbon materials and production process thereof, and adsorbents, masks, adsorbing sheets and carriers
US10756346B2 (en) 2007-04-04 2020-08-25 Sony Corporation Porous Carbon Material
US11545665B2 (en) 2007-04-04 2023-01-03 Sony Corporation Carbon-polymer complex
US11955638B2 (en) 2007-04-04 2024-04-09 Sony Corporation Sheet-shaped member
WO2017162914A1 (en) * 2016-03-23 2017-09-28 Valmet Technologies Oy Method and system for hydrothermal production of activated carbon
WO2019104382A1 (en) 2017-11-30 2019-06-06 The University Of Adelaide Apparatus and method of producing activated carbon material
EP3717406A4 (en) * 2017-11-30 2021-08-18 Bygen Pty Ltd Apparatus and method of producing activated carbon material
US11731879B2 (en) 2017-11-30 2023-08-22 Bygen Pty Ltd Apparatus and method of producing activated carbon material
CN109704334A (en) * 2019-03-13 2019-05-03 南京工业大学 A kind of preparation method of lignin-base meso-porous carbon material

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