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분자체를 이용한 LNG 액화 플랜트 탈수 공정의 효율성 향상에 관한 연구
박종화(JONGHWA PARK),유돈상(DONSANG YU),조대명(DAEMYEONG CHO) 한국수소및신에너지학회 2024 한국수소 및 신에너지학회논문집 Vol.35 No.1
The natural gas dehydration process plays a central role in liquefying LNG. This study proposes two natural gas dehydration process systems applicable to liquefied natural gas (LNG) liquefaction plants, and compares and analyzes energy optimization measures through simulation. The fuel gas from feed stream (FFF) case, which requires additional equipment for gas circulation, disadvantages are design capacity and increased energy. On the other hand, the end flash gas (EFG) case has advantages such as low initial investment costs and no need for compressors, but has downsides such as increased power energy and the use of gas with different components. According to the process simulation results, the required energy is 33.22 MW for the FFF case and 32.86 MW for the EFG case, confirming 1.1% energy savings per unit time in the EFG case. Therefore, in terms of design pressure, capacity, device configuration, and required energy, the EFG case is relatively advantageous. However, further research is needed on the impact of changes in the composition of regenerated gas on the liquefaction process and the fuel gas system.
암모니아 반응기의 분해 효율 최적화를 통한 암모니아 분해 및 수소 정제 공정 모델 연구
조대명(DAEMYEONG CHO),박종화(JONGHWA PARK),유돈상(DONSANG YU) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.6
In this study, a process model and optimization design direction for a hydrogen production plant through ammonia decomposition are presented. If the reactor decomposition rate is designed to approach 100%, the amount of catalyst increases and the devices that make up the entire system also have a large design capacity. However, if the characteristics of the hydrogen regeneration process are reflected in the design of the reactor, it becomes possible to satisfy the total flow rate of fuel gas with the discharged tail gas flow rate. Analyzing the plant process simulation results, it was confirmed that when an appropriate decomposition rate is maintained in the reactor, the phenomenon of excess or shortage of fuel gas disappears. In addition, it became possible to reduce the amount of catalyst required and design the optimized capacity of the relevant processes.