TOPIC 1: PRIMARY RAW MATERIALS FOR PETROCHEMICAL

What is the primary component of natural gas?

• Ethane

• Methane

• Propane

• Butane

What is non-associated natural gas?

• Natural gas found dissolved in crude oil

• Natural gas found in reservoirs without crude oil

• Natural gas mixed with impurities

• Natural gas used for residential heating

Which hydrocarbon is often separated from natural gas for the production of ethylene?

• Methane

• Ethane

• Butane

• Propane

Why is mercaptan added to natural gas?

• To increase its heating value

• To make it safe for transportation

• To give it a detectable smell for safety

• To neutralize impurities

What is the purpose of acid gas treatment in natural gas processing?

• To increase the flammability of natural gas

• To remove hydrogen sulfide and carbon dioxide

• To recover heavier hydrocarbons

• To improve the combustion efficiency

Which of the following is a consequence of using natural gas with high impurities in industry?

• Increased efficiency

• Reduced equipment corrosion

• Higher treatment costs

• Enhanced pipeline efficiency

What method is used to remove moisture from natural gas to prevent hydrate formation?

• Physical absorption

• Glycol treatment

• Chemical absorption

• Distillation

Which process involves using molecular sieves to remove impurities from natural gas?

• Physical absorption

• Physical adsorption

• Chemical absorption

• Cracking

Which hydrocarbons in natural gas are commonly sold as liquefied petroleum gas (LPG)?

• Methane and ethane

• Ethane and propane

• Propane and butane

• Butane and methane

What is the main reason for removing carbon dioxide from natural gas?

• To prevent equipment corrosion

• To increase the natural gas's density

• To prevent solidification during transportation

• To improve its odor