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Sarkari MCQs Government Exam Question Bank
Question no. 10567

Co-current absorbers are typically selected when the gas intended for dissolution in the liquid is___________________?

Select your answer for: Co-current absorbers are typically selected when the gas intended for dissolution in the liquid is___________________?
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Answer: C. A pure substance

Explanation

Co-current absorbers ensure both gas and liquid flow in the same direction through the vessel. When dissolving a pure substance gas, complete dissolution occurs without requiring counter-current concentration gradients. Pure gases eliminate concentration pinch limitations, making co-current flow mechanically simple and effective. Absorption columns transfer soluble gas components from vapor mixtures into liquid solvents. Co-current flow arrangements prevent flooding limitations found at high gas velocities in counter-current towers. Pure gases dissolve readily without leaving inert carrier gases that require counter-current driving forces.

Industrial water chlorination and specialized gas-liquid reactions frequently utilize co-current contactors. Selecting co-current operation allows higher throughput velocities and smaller equipment footprints in specific plants. Understanding gas solubility characteristics helps engineers choose optimal flow configurations for absorbers. Option A is wrong because sparingly soluble gases require counter-current flow to maximize driving force. Option B is incorrect since highly soluble gas mixtures still benefit from counter-current staging for complete recovery. Option D is wrong because absorbing mixtures requires counter-current configurations to achieve high separation purities.

Subject
Engineering
Category
Chemical Engineering
Topic
—
Difficulty
medium

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