scholarly journals Proposing a new solution for marine debris by utilizing on-board low-temperature eco-friendly pulverization system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dong-Ha Lee ◽  
Sungkyun Park ◽  
Hee-Tae Kim ◽  
Jeong-Dae Kim ◽  
Jeong-Hyeon Kim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Environmental Sustainability ◽  
Storage Capacity ◽  
Liquefied Natural Gas ◽  
Marine Debris ◽  
Recycling Process ◽  
Secondary Pollution ◽  
Efficiency And Effectiveness ◽  
Cold Energy ◽  
Prototype Design

AbstractDeveloping an effective and efficient recycling process for marine debris (MD) is one of the most urgent issues to maintain environmental sustainability on Earth. However, restricted storage capacities and secondary pollution (e.g., microbial adhesion, putrefaction) limit the proper MD recycling. Here, we proposed a complete eco-friendly low-temperature MD pulverizing system that utilizes excessive liquefied natural gas (LNG) cold energy (LCE) in an LNG propulsion ship to improve the efficiency and effectiveness of MD recycling. The prototype design of the low-temperature pulverization (LTP) system showed that consumable refrigerant (liquid nitrogen) up to 2831 kg per hour could be substituted. Furthermore, with a 20% ship output, 1250 kg of MD could be treated with 363 kg of additional refrigerant. In addition, LTP systems utilizing LCE could increase the storage capacity by more than 10 times compared to bulk MD while minimizing the required energy consumption. To determine the feasibility of LTP for MD recycling, four types of plastics obtained from actual MD from a coastal area in Busan, Korea were classified and tested.

scholarly journals Proposing a New Route to Solve Marine Debris Pollution Issues: Low-Temperature Eco-friendly Pulverization System by Utilizing LNG Cold Energy

2021 ◽  
Author(s):  
Dong-Ha Lee ◽  
Sungkyun Park ◽  
Hee-Tae Kim ◽  
Jeong-Dae Kim ◽  
Jeong-Hyeon Kim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Storage Capacity ◽  
Energy Requirement ◽  
Liquefied Natural Gas ◽  
Marine Debris ◽  
Recycling Process ◽  
Efficiency And Effectiveness ◽  
Cold Energy ◽  
Prototype Design ◽  
Ship Speed

Abstract Developing an effective and efficient recycling process for marine debris (MD) is one of the most urgent issues to maintain Earth’s sustainability. However, the restricted circumstances for collecting and separating MD in the ocean limit proper MD recycling. Here, we proposed a complete eco-friendly low-temperature MD pulverizing system that utilizes excessive liquefied natural gas (LNG) cold energy (LCE) in an LNG propulsion ship to improve the efficiency and effectiveness of MD recycling. The prototype design of the low-temperature pulverization (LTP) system showed that consumable refrigerant (liquid nitrogen) up to 2831 kg per hour could be substituted. Furthermore, we estimated the additional refrigerant needed for desired MD disposal depending on the ship speed to determine the optimal energy requirement. In addition, LTP systems utilizing LCE can significantly improve the storage capacity by pulverizing bulky MD. To determine the feasibility of LTP for MD recycling, four types of plastics obtained from actual MD from a coastal area in Busan, Korea were classified and tested.

Study on solidification of carbon dioxide using cold energy of liquefied natural gas

2000 ◽  
Vol 29 (4) ◽  
pp. 249-268 ◽  
Author(s):  
Yoshiyuki Takeuchi ◽  
Shogo Hironaka ◽  
Yutaka Shimada ◽  
Kenji Tokumasa
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Cold Energy

Process Analysis of Hydrogen Storage in the Hydrate Form by Utilization of Liquefied Natural Gas Cold Energy

2012 ◽  
Vol 433-440 ◽  
pp. 215-220 ◽  
Author(s):  
Hong Jun Yang ◽  
Shuan Shi Fan ◽  
Xue Mei Lang ◽  
Yan Hong Wang
Keyword(s):  
Natural Gas ◽  
Hydrogen Storage ◽  
Process Analysis ◽  
Liquefied Natural Gas ◽  
Storage Process ◽  
Adsorption Method ◽  
Hydrate Form ◽  
Cold Energy ◽  
Pressure Swing ◽  
Ice Powder

A process of hydrogen storage in the form of hydrate by utilization of liquefied natural gas(LNG) cold energy was proposed. Hydrogen was recovered from exhaust gas by pressure swing adsorption method, and formed gas hydrate with ice powder under a pressure of 35 MPa and a temperature of 140 K. The process analysis was carried out with partially numerical simulation by Aspen Plus and theoretical calculation. The results show that the energy consumption of hydrogen stored in the hydrate form is 12058 kJ/(kg.H2) and of this hydrogen storage process, the ratio of spent energy to stored energy is 0.10 , which is superior to the most of the other method. The research indicated that if there is cold energy with low temperature available, hydrogen stored in the hydrate form is a method of feasible and energy-efficient.

Extra-Low-Temperature Oxygen Storage Capacity of CeO2Nanocrystals with Cubic Facets

Nano Letters ◽  
2011 ◽  
Vol 11 (2) ◽  
pp. 361-364 ◽  
Author(s):  
Jing Zhang ◽  
Hitoshi Kumagai ◽  
Kae Yamamura ◽  
Satoshi Ohara ◽  
Seiichi Takami ◽  
...  
Keyword(s):  
Low Temperature ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage
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