{"id":6877,"date":"2025-04-29T14:38:02","date_gmt":"2025-04-29T06:38:02","guid":{"rendered":"https:\/\/www.xuyemachine.com\/?p=6877"},"modified":"2025-08-26T15:18:10","modified_gmt":"2025-08-26T07:18:10","slug":"chemical-phosphoric-acid-activated-carbon-production-process","status":"publish","type":"post","link":"https:\/\/www.baoyuanjx.com\/ar\/chemical-phosphoric-acid-activated-carbon-production-process.html","title":{"rendered":"Chemical phosphoric acid activated carbon production process"},"content":{"rendered":"

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The phosphoric acid method for producing activated carbon<\/mark><\/a> is a commonly used chemical activation process. It mainly uses phosphoric acid as an activator to convert carbon-containing raw materials (such as wood, coconut shells, fruit shells, etc.) into activated carbon with a high porosity structure at high temperature. The following is a brief introduction to the method:<\/p>\n\n\n

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\"Chemical<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n
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  1. Basic principle
    Phosphoric acid plays the following roles during the heating process:<\/li>\n<\/ol>\n\n\n\n

    Dehydrating agent: promotes the removal of moisture and volatiles in the raw materials, inhibits tar formation, and reduces carbon loss.<\/p>\n\n\n\n

    Oxidant: reacts with cellulose and lignin in the raw materials to form a cross-linked structure and expand the pores.<\/p>\n\n\n\n

    Template effect: phosphoric acid penetrates into the raw materials, leaving abundant pores (mainly mesopores) after pyrolysis.<\/p>\n\n\n\n

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    1. Production process
      Raw material pretreatment<\/li>\n<\/ol>\n\n\n\n

      The raw materials are crushed to a suitable particle size (usually 3-10mm) and impurities are removed.<\/p>\n\n\n\n

      Impregnation<\/p>\n\n\n\n

      Mix the raw materials with phosphoric acid solution in a certain proportion and soak for several hours until uniform penetration.<\/p>\n\n\n\n

      Activation<\/p>\n\n\n\n

      In an inert atmosphere (such as nitrogen) or oxygen-limited conditions, heat to 400-600\u2103 for 1-2 hours to allow phosphoric acid to fully react with the raw materials.<\/p>\n\n\n\n

      Recover phosphoric acid<\/p>\n\n\n\n

      After activation, wash with water until neutral and recover phosphoric acid (recyclable).<\/p>\n\n\n\n

      Drying and crushing<\/p>\n\n\n\n

      The washed activated carbon is dried, crushed, and sieved to obtain the finished product.<\/p>\n\n\n\n

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      1. Product features
        Developed pores: mainly mesopores, suitable for adsorbing larger molecules (such as pigments, organic matter).<\/li>\n<\/ol>\n\n\n\n

        High specific surface area: usually up to 1000-1500 m\u00b2\/g.<\/p>\n\n\n\n

        Surface oxygen-containing functional groups: phosphoric acid activation will introduce acidic groups and enhance the adsorption of polar substances.<\/p>\n\n\n\n

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        1. Advantages and disadvantages
          Advantages:<\/li>\n<\/ol>\n\n\n\n

          Low activation temperature (compared to physical methods) and low energy consumption.<\/p>\n\n\n\n

          Controllable pore structure and excellent adsorption performance.<\/p>\n\n\n\n

          Disadvantages:<\/p>\n\n\n\n

          Waste acid needs to be treated, and the environmental protection cost is high.<\/p>\n\n\n\n

          The equipment needs to be resistant to acid corrosion (such as enamel or stainless steel).<\/p>\n\n\n\n

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          1. Application areas
            Water treatment: removal of heavy metals and organic pollutants.<\/li>\n<\/ol>\n\n\n\n

            Food industry: decolorization, refined sugar solution.<\/p>\n\n\n\n

            Chemical industry: catalyst carrier, gas purification.<\/p>\n\n\n\n

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            1. Environmental protection and improvement
              Phosphoric acid recovery: reduce waste liquid discharge through evaporation concentration or neutralization treatment.<\/li>\n<\/ol>\n\n\n\n

              Green alternative: study the activation process of biomass acid (such as citric acid) or low-concentration phosphoric acid.<\/p>\n\n\n\n

              The phosphoric acid method occupies an important position in the industry due to its high efficiency and controllability, but it needs to balance performance and environmental protection requirements.<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":6881,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[34],"tags":[45],"class_list":["post-6877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-activated-carbon-production-process"],"metadata":{"_edit_lock":["1756192690:2"],"views":["7894"],"_edit_last":["2"],"catce":["sidebar-widgets4"],"_wp_old_slug":["6877-2"],"_thumbnail_id":["6881"],"themepark_seo_title":["Chemical activation method for producing activated carbon: process flow and characteristics of phosphoric acid method"],"themepark_seo_description":["Phosphoric acid activation is a key technology for preparing highly porous activated carbon. This article explains in detail its production steps, phosphoric acid recovery methods and industry application cases."],"themepark_seo_keyword":["Phosphoric acid activated carbon\uff0c Activated carbon production process \uff0cChemical activation method"]},"medium_url":"https:\/\/www.baoyuanjx.com\/wp-content\/uploads\/2025\/04\/chemical-300x250.jpg","thumbnail_url":"https:\/\/www.baoyuanjx.com\/wp-content\/uploads\/2025\/04\/chemical-150x150.jpg","full_url":"https:\/\/www.baoyuanjx.com\/wp-content\/uploads\/2025\/04\/chemical.jpg","_links":{"self":[{"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/posts\/6877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/comments?post=6877"}],"version-history":[{"count":6,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/posts\/6877\/revisions"}],"predecessor-version":[{"id":6891,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/posts\/6877\/revisions\/6891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/media\/6881"}],"wp:attachment":[{"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/media?parent=6877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/categories?post=6877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.baoyuanjx.com\/ar\/wp-json\/wp\/v2\/tags?post=6877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}