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LPG Recovery Plant Process Description

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Questions and Answers

Why is it necessary to cool the dried gas to -65 deg C in the Chill down process?

To dry the gas further
To increase the pressure of the gas
To remove any remaining water vapor
To condense the gas into liquid form (correct)

What is the purpose of the Knock Out (K.O.) Drum in the Gas receiving, drying, and regeneration section of the LPG Recovery Plant?

To separate any liquid present in the gas (correct)
To cool down the natural gas
To increase the pressure of the natural gas
To remove water from the natural gas

What is the purpose of the Separator - I in the Chill down process?

To separate condensed liquid from the vapor (correct)
To remove water from the gas
To compress the vapor
To increase the temperature of the gas

Why is it not practical to increase butane recovery by using another refrigerant like ethane?

Using ethane makes the process uneconomical (C) Signup and view all the answers

In the distillation section of the process, what is the purpose of the LEF (Light End Fractionation) column?

Remove Methane, Ethane, and most of Carbon Dioxide (B) Signup and view all the answers

What is used as the refrigerant for supplying duty in the distillation process?

Overhead vapors from the second stage separators (C) Signup and view all the answers

What is the main product obtained from the Propane Column in the fractionation section?

Propane (D) Signup and view all the answers

Which column in the process setup is responsible for the separation of LPG as a top product?

LPG Column (C) Signup and view all the answers

What is the primary purpose of the Oil Absorption Process described in the text?

To recover desired LPG components from the gas by absorption in oil. (B) Signup and view all the answers

What happens in the Cryogenic Process using Turbo expander described in the text?

Gas is expanded through a turbo expander to cool and condense, then separated and fractionated to recover LPG and Natural Gasoline. (C) Signup and view all the answers

Why is the Oil Absorption Process considered uneconomical for light gases?

It requires a very large quantity of absorbing oil like Naphtha. (B) Signup and view all the answers

What is a key difference between the Cryogenic Process using Turbo expander and the Cryogenic Process using External Refrigeration Process?

The former involves expansion through a turbo expander for cooling, while the latter uses an external refrigeration system for cooling. (B) Signup and view all the answers

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