Adsorção em Carvão Ativado para Purificação de Água e Ar

O material adsorvente mais versátil da natureza

Environmental & Water Treatment Global Industrial Scale $7 billion

Visão geral

Activated carbon is produced by thermal or chemical activation of carbonaceous materials (coconut shell, coal, wood) to create an extremely porous material with surface areas of 800-1,500 m2/g. The vast internal surface adsorbs organic contaminants, chlorine, odors, and certain heavy metals from water and air. Activated carbon is used in municipal water treatment, industrial wastewater polishing, air purification, gas masks, gold recovery, and food/beverage decolorization.

Processo químico

Raw material (coconut shell, bituminous coal, or wood) is carbonized at 600-900 degrees C in an inert atmosphere. The char is then activated by steam or CO2 at 800-1,100 degrees C, which selectively gasifies carbon to create micropores (<2 nm) and mesopores (2-50 nm). Chemical activation uses ZnCl2 or H3PO4 at lower temperatures (400-600 degrees C). The activated carbon is washed, dried, and sized.

C + H2O ->[800-1,100 degrees C] CO + H2 (steam activation, endothermic, creates porosity)
C + CO2 ->[800-1,100 degrees C] 2CO (CO2 activation)
Adsorption is physical (van der Waals) -- not a chemical reaction

Matérias-primas

  • Coconut shell — Copra industry byproduct (SE Asia, India) (Carbon source (produces microporous AC))
  • Bituminous coal — Coal mining (Carbon source (general purpose AC))
  • Steam (H2O) — Boiler systems (Physical activation agent)

Produtos finais

  • Granular activated carbon (GAC) — Water treatment filters, air purification (Surface area 800-1,500 m2/g, iodine number 900-1,200)
  • Powdered activated carbon (PAC) — Batch water treatment, decolorization (Particle size <100 mesh)
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Environmental Impact

Activated carbon production from coal consumes non-renewable resources and produces CO2. Coconut shell-based AC is more sustainable. Spent activated carbon from water treatment may contain concentrated contaminants and requires thermal reactivation or proper disposal. Reactivation recovers >90% of adsorption capacity.

Considerações de segurança

Inovações recentes

Biochars from agricultural waste (rice husk, corn stover) provide low-cost AC alternatives for developing countries.
Magnetic activated carbon enables easy separation from water.
Activated carbon fiber cloths offer faster kinetics and lower pressure drop than granular AC in air purification.

Escala de produção

4500000

toneladas/ano

$7 billion

valor de mercado

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Frequently Asked Questions

What industry uses Adsorção em Carvão Ativado para Purificação de Água e Ar?
Adsorção em Carvão Ativado para Purificação de Água e Ar is used in the environmental & water treatment sector at global industrial scale scale.
What process is involved in Adsorção em Carvão Ativado para Purificação de Água e Ar?
Raw material (coconut shell, bituminous coal, or wood) is carbonized at 600-900 degrees C in an inert atmosphere. The char is then activated by steam or CO2 at 800-1,100 degrees C, which selectively gasifies carbon to create micropores (<2 nm) and mesopores (2-50 nm). Chemical activation uses ZnCl2
What is the economic significance of Adsorção em Carvão Ativado para Purificação de Água e Ar?
Adsorção em Carvão Ativado para Purificação de Água e Ar has a market value of $7 billion and annual production of 4,500,000 tons.
What is the environmental impact of Adsorção em Carvão Ativado para Purificação de Água e Ar?
Activated carbon production from coal consumes non-renewable resources and produces CO2. Coconut shell-based AC is more sustainable. Spent activated carbon from water treatment may contain concentrated contaminants and requires thermal reactivation or proper disposal. Reactivation recovers >90% of a
What raw materials are used in Adsorção em Carvão Ativado para Purificação de Água e Ar?
The main raw materials include: Coconut shell, Bituminous coal, Steam (H2O).