Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III COAL GASIFICATION, COAL BED METHANE AND SHALE GAS Previous Question Paper (May - 2019 - R16)
Note: This question paper contains two parts A and B. 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
Write a merits of underground coal gasification (UCG).
Answer
Underground coal gasification (UCG) eliminates the need for coal mining, significantly reducing surface environmental impact and land disturbance. It also improves worker safety by removing the need for personnel to work in underground mining environments.
Give a short note on the injection process.
Answer
The injection process involves pumping gasifying agents, such as air, oxygen, or steam, from the surface into the coal seam through injection wells. These agents react with the coal in situ to initiate and sustain the gasification process, converting coal into a combustible product gas.
Write a short on the Borehole Stability.
Answer
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What is in-seam drilling?
Answer
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Write the world scenario of underground gasification (UCG).
Answer
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Compare the UCG vs conventional gasification.
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Write a short note on the hydrogasification.
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How to removal properties of hexavalent chromium and hazardous trace elements in UCG condensate water by semi-cokes.
Answer
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Explain the reverse combustion linking in underground coal gasification.
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Write the future of underground coal gasification.
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Part B
What are the advantages over conventional underground or strip mining and surface gasification of UCG?
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What are the conditions suitable for Underground Coal Gasification (UCG)?
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What are the steps involved in the process of product gas from UCG?
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Explain a minimal requirements for UCG siting and operation.
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Explain the anticipated economic resources and anticipated sub economic resources for UCG based on technological conditions and basic data of rock mass.
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Explain a environmental benefits of UCG over underground coal mining for fueling power generation.
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Develop mathematical model for two-dimensional (2d) temperature field.
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Explain a analysis of UCG current state of science and technology and determination of criteria for site selection.
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Explain the borehole procedure method with neat sketches.
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Describe the details on the stream method.
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Mention the detailed note on the blind bore hole method.
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Describe the chamber method with neat diagram.
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Explain the extremum seeking control of carbon monoxide concentration in underground coal gasification.
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Derive the modeling of flowing underground waters and leakage of syngas from underground coal gasification.
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Describe the evaluation of a compact coaxial underground coal gasification system inside an artificial coal seam.
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Explain the monitoring and evaluation of simulated underground coal gasification in an ex-situ experimental artificial coal seam.
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Describe briefly about pekcolation linkage technique with neat sketches.
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Explain briefly hydraulic fracture linkage technique with required diagram.
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What are the advantages and disadvantages of electro linkage technique?
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Describe the boring linkage technique with neat sketches.
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