{"id":6771,"date":"2025-03-26T09:59:24","date_gmt":"2025-03-26T01:59:24","guid":{"rendered":"https:\/\/www.xuyemachine.com\/?p=6771"},"modified":"2026-04-29T10:19:06","modified_gmt":"2026-04-29T02:19:06","slug":"chemical-process-activated-carbon-making-machine","status":"publish","type":"post","link":"https:\/\/www.baoyuanjx.com\/fr\/chemical-process-activated-carbon-making-machine.html","title":{"rendered":"Machine de fabrication de charbon actif par proc\u00e9d\u00e9 chimique"},"content":{"rendered":"
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Phosphoric acid chemical process activated carbon making machine<\/h1>\n\n\n\n
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La m\u00e9thode chimique est une m\u00e9thode courante de production de charbon actif, qui a un effet d'activation \u00e9lev\u00e9 et un faible co\u00fbt de production. L'acide phosphorique, en tant qu'activateur chimique, joue un r\u00f4le cl\u00e9 dans la production de charbon actif, qui peut am\u00e9liorer de mani\u00e8re significative la structure des pores et la surface du charbon, am\u00e9liorant ainsi sa performance d'adsorption.<\/p>\n\n\n\n

La mati\u00e8re premi\u00e8re est broy\u00e9e en sciure de bois \u2264 4mm. Elle entre ensuite dans le s\u00e9choir pour s\u00e9cher l'humidit\u00e9 jusqu'\u00e0 10-15%. La sciure s\u00e9ch\u00e9e est cribl\u00e9e pour \u00e9liminer les particules > 4 mm.
La mati\u00e8re premi\u00e8re et l'acide phosphorique sont m\u00e9lang\u00e9s et agit\u00e9s dans le rapport sp\u00e9cifi\u00e9. La sciure a une grande surface sp\u00e9cifique et peut \u00eatre humidifi\u00e9e en peu de temps.
Le mat\u00e9riau m\u00e9lang\u00e9 est envoy\u00e9 dans le four d'activation. Le mat\u00e9riau passe par les \u00e9tapes suivantes.
Phase \u00e0 basse temp\u00e9rature (100-200\u00b0C) : d\u00e9shydratation de l'acide phosphorique et carbonisation initiale de la mati\u00e8re premi\u00e8re.
\u00c9tape \u00e0 haute temp\u00e9rature (400-600\u00b0C, g\u00e9n\u00e9ralement 450-550\u00b0C) : l'acide phosphorique catalyse la r\u00e9action d'oxydation pour former des structures microporeuses et m\u00e9soporeuses. Apr\u00e8s l'activation, le charbon actif entre dans le r\u00e9servoir de lavage pour \u00eatre lav\u00e9 \u00e0 l'eau afin de nettoyer l'acide phosphorique pr\u00e9sent dans le charbon actif.<\/p>\n\n\n

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L'acide phosphorique subit les modifications suivantes tout au long du processus :<\/p>\n\n\n\n

Phase \u00e0 basse temp\u00e9rature (100-200\u00b0C) : d\u00e9shydratation et est\u00e9rification Changements physiques :
L'acide phosphorique liquide (H\u2083 PO\u2084) p\u00e9n\u00e8tre dans la mati\u00e8re premi\u00e8re (comme la sciure) et se r\u00e9partit uniform\u00e9ment par capillarit\u00e9.
L'eau s'\u00e9vapore progressivement, la concentration d'acide phosphorique augmente et un film liquide visqueux se forme pour envelopper les fibres de cellulose.
Changements chimiques :
R\u00e9action de d\u00e9shydratation : L'acide phosphorique lib\u00e8re du H\u207a qui r\u00e9agit avec le groupe hydroxyle (-OH) de la cellulose pour former un ester phosphate (cellulose-OPO\u2083 H\u2082).
et \u00e9limine l'eau :
Cellulose-OH + H\u2083 PO\u2084 \u2192 Cellulose-OPO\u2083 H\u2082 + H\u2082O Cellulose-OH + H\u2083 PO\u2084 \u2192 Cellulose-OPO\u2083 H\u2082 + H\u2082
Formation de liaisons ester : d\u00e9truit la structure cristalline de la cellulose, ce qui facilite sa pyrolyse, et fixe le squelette de carbone par r\u00e9ticulation pour \u00e9viter un r\u00e9tr\u00e9cissement excessif.<\/p>\n\n\n\n

Phase \u00e0 temp\u00e9rature moyenne (200-400\u00b0C) : d\u00e9composition et r\u00e9ticulation Modifications physiques : L'acide phosphorique est partiellement d\u00e9shydrat\u00e9 pour former des acides condens\u00e9s tels que l'acide pyrophosphorique (H\u2084 P\u2082O\u2087) et l'acide polyphosphorique (H\u2085 P\u2083O1\u2080). Les mati\u00e8res premi\u00e8res commencent \u00e0 se carboniser et les mati\u00e8res organiques volatiles (comme le goudron) sont inhib\u00e9es par l'acide phosphorique, ce qui r\u00e9duit l'obstruction des pores. Changements chimiques : Craquage catalys\u00e9 par l'acide : L'acide phosphorique acc\u00e9l\u00e8re la pyrolyse de la cellulose et de la lignine, g\u00e9n\u00e9rant du CO, du CO\u2082 et de petites mati\u00e8res organiques mol\u00e9culaires pour former les pores initiaux. Stabilit\u00e9 de la r\u00e9ticulation : L'acide phosphorique forme des liaisons P-O-C avec le squelette de carbone, renfor\u00e7ant la r\u00e9sistance m\u00e9canique de la structure de carbone et emp\u00eachant l'effondrement des pores \u00e0 haute temp\u00e9rature. 3. Phase d'activation \u00e0 haute temp\u00e9rature (400-600\u00b0C) : oxydation et formation de pores Changements physiques : L'acide phosphorique est ensuite d\u00e9shydrat\u00e9 et partiellement converti en acide m\u00e9taphosphorique (HPO\u2083) et en oxydes de phosphore (tels que P\u2082O\u2085). Le squelette de carbone est attaqu\u00e9 par l'acide phosphorique et un grand nombre de micropores et de structures m\u00e9soporeuses sont g\u00e9n\u00e9r\u00e9s.<\/p>\n\n\n\n

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Changements chimiques :
R\u00e9action d'oxydation : L'acide phosphorique agit comme un oxydant qui favorise l'oxydation du carbone pour g\u00e9n\u00e9rer du CO\u2082 et dilater les pores :
C + H\u2083 PO\u2084 \u2192 CO\u2082\u2191 + H\u2082O + phosphate C + H\u2083 PO\u2084 \u2192 CO\u2082\u2191 + H\u2082O + phosphate
Effet de gabarit : L'acide phosphorique et ses produits de condensation occupent l'espace pendant le processus de carbonisation, laissant des pores apr\u00e8s le lavage (similaire au \"gabarit sacrificiel\").<\/p>\n\n\n\n

\u00c9tape de refroidissement et de lavage : r\u00e9sidus et r\u00e9cup\u00e9ration R\u00e9sidu d'acide phosphorique :
L'acide phosphorique non d\u00e9compos\u00e9 reste dans les pores du charbon actif sous forme de H\u2083 PO\u2084 ou de phosphate (tel que K\u2083 PO\u2084, Na\u2083PO\u2084).
R\u00e9cup\u00e9ration d'acide :
L'acide phosphorique est r\u00e9cup\u00e9r\u00e9 par lavage \u00e0 l'eau (le taux de r\u00e9cup\u00e9ration peut atteindre plus de 80%).<\/p>\n\n\n\n

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1.The Principle of Phosphoric Acid in Activated Carbon Preparation:
01.Catalytic Hydrolysis and Dehydration
Phosphoric acid catalyzes the hydrolysis of polysaccharides (such as cellulose and hemicellulose) in biomass precursors (such as wood, plant fiber, and sludge) into oligosaccharides or monosaccharides.
At the same time, phosphoric acid catalyzes the dehydration of oligosaccharides and their degradation products, promoting aromatization and forming a graphite-like microcrystalline structure, which is the basis for the high specific surface area and excellent adsorption properties of activated carbon.
Cross-linking Reaction and Pore Formation
Phosphoric acid forms a stable carbon skeleton by cross-linking with biopolymers. It also creates pores through chemical etching and space-filling during the activation process. After removal of the phosphoric acid, the etched channels and the spaces occupied by the phosphoric acid are converted into pores, thereby increasing the specific surface area and pore volume of the activated carbon.<\/p>\n\n\n\n

02.Inhibiting Tar Formation
During the carbonization process, phosphoric acid catalyzes the cleavage of macromolecular bonds, reducing tar formation through cyclization and polycondensation reactions. This helps increase the carbon yield of activated carbon and improve its pore structure.<\/p>\n\n\n\n

Effect of Phosphoric Acid on the Pore Size Distribution of Activated Carbon
Pore Size: Phosphoric acid activation tends to form micropores smaller than 2 nanometers, endowing the activated carbon with excellent adsorption properties.
Pore Size Distribution: Higher concentrations of phosphoric acid tend to form more micropores, while lower concentrations or mixed activators may produce a wider pore 03.size distribution.
Porosity: Phosphoric acid activation can significantly increase the porosity of activated carbon and its specific surface area, facilitating its application in adsorption, catalysis, and other fields.<\/p>\n\n\n\n

2.Applications of Phosphoric Acid-Activated Activated Carbon:
01.Water Treatment: Activated carbon activated with phosphoric acid can be used to remove organic matter, heavy metal ions, and odors from water, improving water quality.
02.Gas Purification: In the gas purification field, activated carbon activated with phosphoric acid can be used to adsorb harmful gases such as sulfur dioxide and nitrogen oxides, reducing air pollution.
03.Food Decolorization: Activated carbon activated with phosphoric acid can be used in the food industry for decolorization and purification, improving food quality and safety.<\/p>\n\n\n\n

Phosphoric acid activated carbon rotary kiln parameter<\/h2>\n\n\n\n
Item<\/td>Mod\u00e8le<\/td>Capacit\u00e9<\/td>Size<\/td><\/tr>
Rotary activationFurnace(internal heat type\uff09 <\/td>\u03a61.5m\u00d712m <\/td>1-2t\/d<\/td>16000*2300*4000mm <\/td><\/tr>
 <\/td>\u03a61.5m\u00d715m <\/td>2-3t\/d<\/td>20000*2700*4500mm<\/td><\/tr>
 <\/td>\u03a62.0m\u00d718m <\/td>4-5t\/d<\/td>22000*3000*4500mm<\/td><\/tr>
 <\/td>\u03a62.6m\u00d720m <\/td>5-8t\/d<\/td>26000*3600*5000mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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FAQ<\/h2>\n\n\n\n

Frequently asked questions about chemical production of activated carbon<\/strong><\/p>\n\n\n\n

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<\/i><\/span>What are the advantages of chemical activation\uff1f<\/div>\n
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  • Rendement \u00e9lev\u00e9 en carbone, le rapport entre les mati\u00e8res premi\u00e8res et les produits de charbon actif peut atteindre 2,5-3,5:1.<\/li>\n\n\n\n
  • Haute qualit\u00e9 des produits finis, faible teneur en cendres<\/li>\n<\/ul>\n\n\n\n

    <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

    <\/i><\/span>Why should the raw materials be dried before adding chemicals\uff1f<\/div>\n
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    • L'impr\u00e9gnation \u00e0 sec ne n\u00e9cessitant qu'un m\u00e9lange et une agitation, elle convient \u00e0 la production en continu.<\/li>\n\n\n\n
    • L'impr\u00e9gnation humide dure de 2 \u00e0 4 heures.<\/li>\n<\/ul>\n\n\n\n

      <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

      <\/i><\/span>Why choose phosphoric acid to impregnate sawdust raw materials\uff1f<\/div>\n
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      • Mild process conditions and low energy consumption.<\/li>\n\n\n\n
      • Activation \u00e0 basse temp\u00e9rature : la temp\u00e9rature d'activation est g\u00e9n\u00e9ralement comprise entre 400 et 600 \u00b0C, ce qui est nettement inf\u00e9rieur \u00e0 la m\u00e9thode d'activation physique (800-1000 \u00b0C) et permet de r\u00e9duire consid\u00e9rablement la consommation d'\u00e9nergie.<\/li>\n<\/ul>\n\n\n\n
          \n
        • Aucune pr\u00e9carbonisation n'est n\u00e9cessaire, l'activation chimique et la carbonisation sont r\u00e9alis\u00e9es en une seule \u00e9tape, ce qui simplifie le processus et raccourcit le cycle de production.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>
          <\/div><\/section>\n\n\n\n

          <\/p>","protected":false},"excerpt":{"rendered":"

          Activated carbon kiln is a special equipment for producing activated carbon. It mainly converts carbon-containing materials (such as wood, coal, coconut shell, etc.) into activated carbon with a highly porous structure through high-temperature pyrolysis and steam activation. Activated carbon is widely used in water treatment, air purification, waste gas treatment and industrial adsorption. The working principle of the activated carbon kiln includes heating the raw materials to a certain temperature and activating the reaction under specific conditions, so that a large number of micropores are formed on its surface to improve the adsorption performance. With the continuous improvement of environmental protection needs, modern activated carbon kilns are gradually developing in the direction of energy saving, environmental protection and high efficiency, optimizing production processes, reducing energy consumption, and improving the quality and output of activated carbon.<\/p>","protected":false},"author":2,"featured_media":7843,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"100% 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