According to Ellingham Diagram, the Reduction of Al₂O₃ with Carbon

question 4

Multiple Choice

According to Ellingham diagram, the reduction of Al₂O₃ with carbon is feasible above 2400C, why is Al₂O₃ reduced in practice electrochemically rather than chemically with carbon?

• A) The temperature is too high and maintaining it is too expensive.
• B) It is difficult to achieve correct Al₂O₃-to-carbon ratio in practice.
• C) Formed Al is reducing enough to reduce CO and CO₂ back to carbon.

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Definitions:

XIC

Acronym for "Examine If Closed," a common instruction used in programmable logic controllers (PLCs) to check if a contact or switch is closed.

Internal Relay Instructions

Commands in a PLC or other control systems that enable internal processing signals or operations without using physical relay hardware, often for logic or timing functions.

Output

The information or energy provided as a result of a process, system, or device's operation, often directed to an external or subsequent system.