액화천연가스(LNG)를 사용한 수소 생산 및 액화 공정 개발 = Design and Analysis of Hydrogen Production and Liquefaction Process by Using Liquefied Natural Gas

다국어 초록 (Multilingual Abstract)

Compare to the gaseous hydrogen, liquid hydrogen has various advantages: easy to transport, high energy density, and low risk of explosion. However, the hydrogen liquefaction process is highly energy intensive because it requires lots of energy for refrigeration. On the other hand, the cold energy of the liquefied natural gas (LNG) is wasted during the regasification. It means there are opportunities to improve the energy efficiency of the hydrogen liquefaction process by recovering wasted LNG cold energy. In addition, hydrogen production by natural gas reforming is one of the most economical ways, thus LNG can be used as a raw material for hydrogen production. In this study, a novel hydrogen production and liquefaction process is proposed by using LNG as a raw material as well as a cold source. To develop this process, the hydrogen liquefaction process using hydrocarbon mixed refrigerant and the helium-neon refrigerant is selected as a base case design. The proposed design is developed by applying LNG as a cold source for the hydrogen precooling. The performance of the proposed process is analyzed in terms of energy consumption and exergy efficiency, and it is compared with the base case design. As the result, the proposed design shows 17.9% of energy reduction and 11.2% of exergy efficiency improvement compare to the base case design.

참고문헌 (Reference)

1 한단비, "수소액화공정에서 LNG 냉열 적용에 관한 시뮬레이션 연구" 한국수소및신에너지학회 31 (31): 33-40, 2020

2 Baccioli, A., "Small Scale Bio-LNG Plant: Comparison of Different Biogas Upgrading Techniques" 217 : 328-335, 2018

3 Chen, J., "Production of Hydrogen by Methane Steam Reforming Coupled with Catalytic Combustion in Integrated Microchannel Reactors" 11 (11): 2045-, 2018

4 Alabdulkarem, A., "Optimization of Propane Pre-cooled Mixed Refrigerant LNG Plant" 31 (31): 1091-1098, 2011

5 Aasadnia, M., "Large-scale Liquid Hydrogen Production Methods and Approaches: A Review" 212 : 57-83, 2018

6 Kuendig, A, "Large Scale Hydrogen Liquefaction in Combination with LNG Re-gasification" 3326-3333, 2006

7 Sadaghiani, M. S., "Introducing and Energy Analysis of a Novel Cryogenic Hydrogen Liquefaction Process Configuration" 42 (42): 6033-6050, 2017

8 Yang J., "Integrated Hydrogen Liquefaction Process with Steam Methane Reforming by Using Liquefied Natural Gas Cooling System" 255 : 113840-, 2019

9 Sharma, S., "Hydrogen the Future Transportation Fuel: From Production to Applications" 43 : 1151-1158, 2015

10 Drnevich, R., "Hydrogen Delivery: Liquefaction and Compression" 2003

11 Dincer, I., "Green Methods for Hydrogen Production" 37 (37): 1954-1971, 2012

12 Bidar, B., "Energy and Exergo-economic Assessments of Gas Turbine Based CHP Systems: A Case Study of SPGC Utility Plant" 37 (37): 209-223, 2018

13 Krasae-in S., "Development of Largescale Hydrogen Liquefaction Processes from 1898 to 2009" 35 (35): 4524-4533, 2010

14 Zheng J., "Development of High Pressure Gaseous Hydrogen Storage Technologies" 37 (37): 1048-1057, 2012

15 Quack, H., "Conceptual Design of a High Efficiency Large Capacity Hydrogen Liquefier" 613 (613): 255-263, 2002

16 Lee, I., "Conceptual Design and Exergy Analysis of Combined Cryogenic Energy Storage and LNG Regasification Processes: Cold and Power Integration" 140 : 106-115, 2017

17 Jensen, J. E, "Brookhaven national laboratory selected cryogenic data notebook: Sections I-IX" Brookhaven National Laboratory 1980

18 Ansarinasab, H., "An Exergy-based Investigation on Hydrogen Liquefaction Plant-Exergy, Exergoeconomic, and Exergoenvironmental Analyses" 210 : 530-541, 2019

19 Asadnia, M., "A Novel Hydrogen Liquefaction Process Configuration with Combined Mixed Refrigerant Systems" 42 (42): 15564-15585, 2017

20 Outlook, B. E, "2019 Edition"