Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech IV Year NATURAL GAS PROCESSING Previous Question Paper (November/December - 2018 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART A
What is natural gas?
Answer
Natural gas is a naturally occurring mixture of gaseous hydrocarbons, consisting primarily of methane, along with varying amounts of ethane, propane, butane, and non-hydrocarbon components like nitrogen, carbon dioxide, and hydrogen sulfide.
Write the carbon number range present in natural gas.
Answer
Natural gas primarily consists of hydrocarbons in the range of C1 to C4 (methane to butane). Heavier hydrocarbons up to C8+ may also be present in smaller quantities in wet gas streams.
Write the chemicals used for the remove water from the natural gas.
Answer
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What is absorption?
Answer
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Which type of distillation is used in nitrogen rejection unit?
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Explain the phenomena "Retrograde Condensation".
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What is NGL?
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Write the pertinent properties of sulfur.
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What is LNG?
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Write the modes of LNG transportation.
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PART B
Discuss the national and international scenario of natural gas.
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What are the impurities which affect the natural gas processing?
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Describe the reasons for processing raw natural gas. Write the raw gas composition and product slate.
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Write the roles of gas plants and also focus on safety systems for gas plants.
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Why gas treating is required? What is done with the acid gases after separation from natural gas?
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What processes are available for acid gas removal from natural gas? How much purification is needed?
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Write the concept of dehydration of natural gas. What parameters affect the glycol dehydrator performance
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Explain adsorption process for natural gas. Differentiate between physical adsorption and chemisorption.
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What are methods used for removal of nitrogen from natural gas? Briefly explain the cryogenic distillation process.
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What is solution gas? Explain nitrogen rejection unit for enhanced oil recovery.
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What is BTEX? What are the methods presently used to control BTEX emission to the atmosphere?
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Explain lean oil absorption process with the help of flow chart.
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What are the methods used in sulfur recovery? Write the short note on sweetening process.
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Describe the cryogenic aboveground in-ground storage for natural gas.
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Discuss the processing required to produce marketable liquid products of natural gas.
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Explain the safety and environmental aspects associated with LNG.
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Write the short notes on regasification and cold utilization of liquefied natural gas.
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