Examkin

Soru

Zorluk: KolayIron: Blast Furnace Extraction, Rusting Prevention, and Chemical Compounds

During the industrial extraction of iron in a blast furnace, hematite (Fe2O3Fe_2O_3) is reduced to iron in the upper region of the furnace. Which chemical species acts as the primary reducing agent in this upper zone?

  1. Carbon(II) oxide (COCO)Cevap
  2. B
    Solid carbon (CC)
  3. C
    Calcium oxide (CaOCaO)
  4. D
    Carbon(IV) oxide (CO2CO_2)

Cevap

Carbon(II) oxide (COCO)
In the blast furnace, carbon(II) oxide (COCO) gas is produced when hot carbon dioxide reacts with excess coke. Rising COCO gas encounters descending hematite (Fe2O3Fe_2O_3) in the upper, cooler zone of the furnace and reduces it to iron: Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)Fe_2O_3(s) + 3CO(g) \rightarrow 2Fe(s) + 3CO_2(g).

Adım Adım Çözüm

1
Identify the chemical reactions occurring in the upper region of the blast furnace.
Near the top of the furnace (200°C–700°C), carbon(II) oxide gas reacts with descending hematite ore.
Gas-solid contact allows COCO to easily reduce the porous iron ore.
2
Write the overall reduction equation.
Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)Fe_2O_3(s) + 3CO(g) \rightarrow 2Fe(s) + 3CO_2(g)
This chemical equation confirms that COCO gains oxygen (is oxidized) while reducing Fe2O3Fe_2O_3 to metallic iron.

Anahtar Kavram

Role of gaseous carbon(II) oxide as the principal reducing agent in blast furnace iron extraction
Tahmini Süre:45s
Bu soruyu puanla

Konular

Iron: Blast Furnace Extraction, Rusting Prevention, and Chemical Compounds

Bu konudan daha fazla soru