http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Comparative studies for the performance of a natural gas steam reforming in a membrane reactor
Boreum Lee(이보름),Hankwon Lim(임한권) 한국가스학회 2016 한국가스학회지 Vol.20 No.6
본 연구에서는 다양한 수소 생산 방법 중 하나인 천연가스 수증기 개질반응(natural gas steam reforming reaction)에 대해 일반적인 충전층반응기와 반응기와 수소분리기가 결합된 새로운 형태의 분리막 반응기에서의 성능에 대한 비교분석을 수행하였다. Xu 와 Froment에 의해 기존에 발표된 실험결과를 바탕으로 상업용 화학공정모사기인 Aspen HYSYS<SUP>Ⓡ</SUP> 모델이 개발되었으며, 반응온도, H₂ 투과량, Ar 유량 등이 분리막 반응기에서의 반응물의 전환율 및 H₂ 수율 향상도에 미치는 영향에 대해 분석한 결과 분리막 반응기에서 보다 많은 양의 수소 수율 및 메탄전환율이 확인되었다. 더 나아가, 전체 시스템에서 필요로 하는 열량을 공급하기 위해 요구되는 천연가스의 양에 초점을 맞춰 분리막 반응기에서의 원가절감 가능성을 평가한 결과, 분리막 반응기에서 10.94%의 원가절감이 관찰되었다. For a natural gas steam reforming, comparative studies of the performance in a conventional packed-bed reactor and a membrane reactor, a new conceptual reactor consisting of a reactor with series of hydrogen separation membranes, have been performed. Based on experimental kinetics reported by Xu and Froment, a process simulation model was developed with Aspen HYSYS<SUP>Ⓡ</SUP>, a commercial process simulator, and effects of various operating conditions like temperature, H₂ permeance, and Ar sweep gas flow rate on the performance in a membrane reactor were investigated in terms of reactant conversion and H₂ yield enhancement showing improved H2 yield and methane conversion in a membrane reactor. In addition, a preliminary cost estimation focusing on natural gas consumption to supply heat required for the system was carried out and feasibility of possible cost savings in a membrane reactor was assessed with a cost saving of 10.94% in a membrane reactor.
Lee, Boreum,Heo, Juheon,Choi, Nak Heon,Moon, Changhwan,Moon, Sangbong,Lim, Hankwon Elsevier 2017 International journal of hydrogen energy Vol.42 No.39
<P><B>Abstract</B></P> <P>Economic analysis with uncertainty analysis based on a Monte-Carlo simulation method was performed for hydrogen production from high pressure PEM water electrolysis targeting a hydrogen production capacity of 30 Nm<SUP>3</SUP> h<SUP>−1</SUP> in Korea. With key economic parameters obtained from sensitivity analysis (SA), a cumulative probability curve was constructed for a unit H<SUB>2</SUB> production cost fully reflecting unpredictable price fluctuations in H<SUB>2</SUB> production equipment, construction, electricity, and labor from ±10% to ±50%. In addition, economic analysis for a net present value (NPV) with uncertainty analysis for revenue (REV), fixed capital investment (FCI), and cost of manufacturing (COM) provided cumulative probability curves with different discount rates and more reliable NPVs (-$ 69,000 ∼$1,308,000) for high pressure PEM water electrolysis under development in Korea. This economic analysis based on uncertainty can serve as important economic indicators suitable for premature technology like high pressure PEM water electrolysis currently being in progress in Korea.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Economic evaluation with uncertainty was performed for PEM water electrolysis. </LI> <LI> Cumulative probability curves were obtained for a unit H<SUB>2</SUB> production cost and a NPV. </LI> <LI> Uncertainty analysis showed H<SUB>2</SUB> production costs of 14.98–17.60 $ kgH<SUB>2</SUB> <SUP>−1</SUP>. </LI> </UL> </P>