Strategies for Process and Size Selection of Natural Gas Liquefaction Processes: Specific Profit Portfolio Approach by Economic Based Optimization

2017 ◽  
Vol 57 (17) ◽  
pp. 5845-5857 ◽  
Author(s):  
Inkyu Lee ◽  
Il Moon
Keyword(s):  
Natural Gas ◽  
Size Selection ◽  
Natural Gas Liquefaction ◽  
Portfolio Approach ◽  
Selection Of

scholarly journals Ship systems for natural gas liquefaction

Pomorstvo ◽  
2016 ◽  
Vol 30 (2) ◽  
pp. 105-112 ◽  
Author(s):  
Aleksandar Vorkapić ◽  
Predrag Kralj ◽  
Dean Bernečić
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Liquid Form ◽  
Essential Requirement ◽  
Technological Processes ◽  
Natural Gas Liquefaction ◽  
Selection Of

This review describes the current liquefaction systems on ships for natural gas transportation in liquid form (Liquefied Natural Gas – LNG). Since in the construction of a gas carrier an essential requirement is the selection of a liquefaction system, this paper describes the principles of operation, thermal and technological processes, as well as the advantages of each system.

scholarly journals Thermodynamic performance of ammonia in liquefied natural gas precooling cycle

2021 ◽  
pp. 72-72
Author(s):  
Ray Soujoudi ◽  
Randall Manteufel
Keyword(s):  
Natural Gas ◽  
Occupational Safety ◽  
Potential Index ◽  
Thermodynamic Performance ◽  
Natural Gas Liquefaction ◽  
Safety Characteristic ◽  
Environmental Agencies ◽  
Exergy Analyses ◽  
Cold Box ◽  
Selection Of

The selection of proper refrigerants for natural gas liquefaction processes play a key role in cycle?s efficiency. Mixed refrigerants have been proven to improve cycle?s exergy efficiency over single pure refrigerant. However, the future of some of these refrigerants with higher global warming potential index (GWPI) are unknown due to the continuous restriction being enforced by the energy and environmental agencies over the past few decades. This study examines the benefits and drawbacks of mixing ammonia, a refrigerant with zero GWPI and a high occupational safety characteristic, with lighter hydrocarbon refrigerants such as methane and ethane as a mixed refrigerant in a natural gas liquefaction?s precooling cycle. Results showed, presence of ammonia in mixed refrigerant not only saved in capital cost due to the smaller footprint of plant and smaller cold box, it also lowers the plants precooling operation expense by reducing the required compression power needed for the precooling cycle up to 16.2%. The results of exergy analyses showed that by reducing the molar concentration of more pollutant refrigerant methane and replacing it with ammonia enhanced the cycle?s efficiency by 4.3% and lowered the heat exchanger total exergy loss up to 47.9 [kW.kgLNG-1].

Volume reduction of produced water generated from natural gas production process using membrane technology

2000 ◽  
Vol 41 (10-11) ◽  
pp. 117-123 ◽  
Author(s):  
C. Visvanathan ◽  
P. Svenstrup ◽  
P. Ariyamethee
Keyword(s):  
Natural Gas ◽  
Produced Water ◽  
Hollow Fibre ◽  
Gas Production ◽  
Oil And Grease ◽  
Natural Gas Production ◽  
Pre Treatment ◽  
Selection Of ◽  
Spiral Wound

This paper presents a case study of a natural gas production site covering various technical issues related to selection of an appropriate Reverse Osmosis (RO) system. The long-term field experience indicates the necessity of the selection of appropriate pretreatment systems for fouling-free RO operational conditions. The produced water has a variety of impurities such as oil and grease, process chemicals used for corrosion and scaling control, and dehydration of natural gas, etc. This situation leads to a complicated and extremely difficult task for a membrane specialist to design RO systems, especially the pre-treatment section. Here as part of the pretreatment selection, two types of UF membrane modules viz. spiral wound and hollow fibre, with MWCO of 8000 and 50,000 Dalton respectively, were tested in parallel with NF membranes of the spiral wound type with MWCO 200 Dalton. The UF permeate is used as feed for RO compatibility testing. Both configurations of UF failed to be compatible, due to irreversible fouling of the RO membrane. The NF membrane, however, showed interesting results, due to membrane stability in terms of cleaning and fouling. The NF plant with 50% capacity gave a recovery of 75% and the RO plant gave a recovery of 60% versus the expected 92–95%. The long-term tests have indicated that the reminder of the membranes could be installed to achieve full capacity of the plant. This study also demonstrates the importance of selection of proper pre-treatment set-up for the RO system design.

scholarly journals Predictive framework for codend size selection of brown shrimp (Crangon crangon) in the North Sea beam-trawl fishery

PLoS ONE ◽  
2018 ◽  
Vol 13 (7) ◽  
pp. e0200464 ◽  
Author(s):  
Juan Santos ◽  
Bent Herrmann ◽  
Daniel Stepputtis ◽  
Claudia Günther ◽  
Bente Limmer ◽  
...  
Keyword(s):  
North Sea ◽  
Brown Shrimp ◽  
Beam Trawl ◽  
Crangon Crangon ◽  
Size Selection ◽  
Trawl Fishery ◽  
The North ◽  
Sea Beam ◽  
The North Sea ◽  
Selection Of
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