JNTU
JNTU B.Tech IV NATURAL GAS PROCESSING Previous Question Paper (May/June - 2019 - 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.
Part A
Explain the classification of Natural gas.
Answer
Natural gas is classified based on its composition and source as Associated gas, which is produced alongside crude oil, and Non-associated gas, which is produced from gas-only reservoirs. It is further categorized as Lean gas (mostly methane) or Rich gas (containing significant amounts of heavier hydrocarbons like ethane, propane, and butane).
Write down important support components in Natural gas processing.
Answer
Important support components in natural gas processing include heat exchangers for temperature control, separators for phase separation, compressors for pressure management, pumps for fluid circulation, and storage tanks for product handling.
Write the desiccant processes for dehydration of natural gas.
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Mention the disadvantages of membrane systems for purifying natural gas.
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What is Retrograde condensation?
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List the 2 amines that remove COS but not CS2 and mercaptants.
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Define Liquefied Petroleum Gas.
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Give an equation for direct oxidation of H2S to sulfur.
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What is Plant efficiency?
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Write Cold utilization of LNG.
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Part B
Discuss the World Scenario of Natural gas.
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Briefly explain any two gas liquid separation processes with a neat sketch.
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Discuss in detail on Hydrate formation prediction in natural gas.
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How hydrate inhibition is done.
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Explain amine treating of natural gas by use of MEA for acid gas removal with a flow diagram.
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Compare chemical and physical solvents for CO2 and H2S removal from natural gas.
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Discuss the schematic integrated natural gas desulfurization plan adsorption.
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With a neat flow sheet explain CO2 removal from natural gas.
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Delineate NRU process by use of two-column cryogenic distillation.
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Discuss in briefly safety and environmental considerations for NRU process.
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Discuss hydro carbon recovery processes.
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Briefly explain how benzene, toluene and xylene removed from Natural gas.
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With a schematic diagram explain NGL fractionation train.
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Discuss Super Claus unit with a neat flow sheet.
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Briefly explain Joule-Thomson liquefaction plan.
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Discuss on storage of LNG cryogen.
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With a Schematic diagram explain hypothetical two-fluid cascade cycle.
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