[논문]수소 활용공정 안전성 확보를 위한 미반응 수소 산화-열 회수 시스템의 운전 조건 최적화 연구

장영희; 김성수

doi:10.14478/ace.2023.1041

수소 활용공정 안전성 확보를 위한 미반응 수소 산화-열 회수 시스템의 운전 조건 최적화 연구
A Study on the Optimal Operating Conditions for an Unreacted Hydrogen Oxidation-Heat Recovery System for the Safety of the Hydrogen Utilization Process 원문보기

공업화학 = Applied chemistry for engineering, v.34 no.3, 2023년, pp.307 - 312

장영희 (경기대학교 일반대학원 환경에너지공학과) , 김성수 (경기대학교 환경에너지공학과)

초록
AI-Helper

본 연구는 수소 경제 사회의 안전 확보를 위해 수소 연료전지 후단 배출된 미반응 수소를 안정적으로 산화하는 방안에 대해 논의하였다. 안전 시스템은 미반응 수소를 에너지원 없이 제거할 수 있는 상온 산화촉매를 충진하였으며, 이때 반응으로 배출되는 산화열은 안정적으로 회수할 수 있는 열 회수 장치를 연계하고자 하였다. 그 결과, 수소 산화 시스템의 충진 조건에 따라 시스템 내 압력 및 유체 흐름이 변화함을 CFD 분석을 통해 확인하였다. 또한 배가스 온도, 열 회수기 내 유량 및 압력조건을 최적화하여 300 ℃ 이상의 배가스 산화 열원을 40 ℃ 이상의 온수를 확보하는 방식으로 폐열을 회수할 수 있음을 확인하였다. 본 연구를 통해 수소 연료전지와 같은 중·소규모 사업장에 적용된 수소 활용 공정을 실증 규모로 평가하여 안전 시스템으로의 가능성을 확인하였다. 추후 실증화 연구를 통해 예측하지 못한 수소 안전사고에 대해 대응할 수 있는 안전 가이드로 활용될 수 있다고 판단된다.

Abstract ▼ AI-Helper

In this study, a catalytic oxidation-heat recovery system was designed that can remove unreacted with a concentration of about 1% to 6% in the exhaust gas of hydrogen fuel cells and recover heat to ensure safety in the hydrogen economy. The safety system was devised by filling hydrogen oxidation catalysts at room temperature that can remove unreacted hydrogen without any energy source, and an exhaust-heat recovery device was integrated to efficiently recover the heat released from the oxidation reaction. Through CFD analysis, variations in pressure and fluid within the system were shown depending on the filling conditions of the hydrogen oxidation system. In addition, it was found that waste heat could be recovered by optimizing the temperature of the exhaust gas, flow rate, and pressure conditions within the heat recovery system and securing hot water above 40 ℃ by utilizing the exhaust gas oxidation heat source above 300 ℃. Through this study, it was possible to confirm the potential of utilizing hydrogen processes, which are applied in small to medium-sized systems such as hydrogen fuel cells, as a safety system by evaluating them at a pilot scale. Additionally, it could be a safety guideline for responding to unexpected hydrogen safety accidents through further pilot-scale studies.

주제어

표/그림 (9)

그림 Figure 1. Fuel cell system with heat recovery and hydrogen oxidation catalyst.
그림 Figure 2. Schematic of catalyst-heat recovery system.
그림 Figure 3. Fluid distribution (pressure and velocity vector) with honeycomb catalyst filling type.
그림 Figure 4. Fluid temperature change with circulation velocity
표 Table 1. Fluid Distribution (Pressure and Velocity Vector) with Honeycomb Catalyst Filling Type
그림 Figure 5. Effect of temperature on inflow hydrogen concentration in the catalytic oxidation system.
그림 Figure 6. Effect of pressure on fluid temperature in the catalyst exhaust-heat recovery system. Catalyst exhaust gas temperature (a) 300 °C and (b) 450 °C.
표 Table 2. Comparison of Heat Recovery Energy Efficiency for Varying Hydrogen Concentrations
표 Table 3. Comparing Heat Recovery Energy Efficiency

참고문헌 (26)

S. Lee, K. Kim, D. Ko, Y. Yoon, and Y. Cho, An experimental？study on the combustion and emission characteristics of hydrogen？enriched lpg fuel in a constant volume chamber, Transaction of the？Korean Hydrogen and New Energy Society, 23, 227-235 (2012).
P. Biswas and C. Y. Wu, Control of toxic metal emissions from？combustors using sorbents: A Review, J. Air Waste Manag.？Assoc., 48, 113-127 (1998).
Y. Manohara, S. E. Hosseini, B. Butler, H. Alzhahrani, B. T. F.？Senior, T. Ashuri, and J. Krohn, Hydrogen fuel cell vehicles; current status and future prospect, Appl. Sci., 9, 2296 (2019).
S. E. Hosseini, A. M. Andwari, M. A. Wahid, and G. Bagheri, A？review on green energy potentials in Iran, Renew. Sust. Energ.？Rev., 27, 533-545 (2013).
M. Granovskii, I. Dincer, and M. A. Rosen, Greenhouse gas emissions reduction by use of wind and solar energies for hydrogen？and electricity production: Economic factors, Int. J. Hydrog. Energy,？32, 927-931 (2007).

상세보기
L. Giorgi1 and F. Leccese, Fuel cells: Technologies and applications, The Open Fuel Cells Journal, 6, 1-20, (2013).
A. Kerviel, A. Pesyridis, A. Mohammed, and D. Chalet, An evaluation of turbocharging and supercharging options for high-efficiency fuel cell electric vehicles, Appl. Sci., 8, 2474 (2018).
C. Wang, M. H. Nehrir, and H. Gao, Control of PEM fuel cell distributed generation systems, IEEE Trans. Energy Convers., 21,？586-595 (2006).

상세보기
T. Somekawa, K. Nakamura, T. Kushi, T. Kume, K. Fujita, and？H. Yakabe, Examination of a high-efficiency solid oxide fuel cell？system that reuses exhaust gas, Appl. Therm. Eng., 114, 1387-1392？(2017).
M. Y. Ayad, M. Becherif, and A. Henni, Vehicle hybridization？with fuel cell, supercapacitors and batteries by sliding mode control, Renew. Energ., 36, 2627-2634 (2011).
U. K. Chakraborty, A new model for constant fuel utilization and？constant fuel flow in fuel cells, Appl. Sci., 9, 1066 (2019).
A. Costilla-Reyes, C. Erbay, S. Carreon-Bautista, A. Han, and E.？Sanchez-Sinencio, A time-interleave-based power management system with maximum power extraction and health protection algorithm for multiple microbial fuel cells for internet of things smart？nodes, Appl. Sci., 8, 2404 (2018).
S.-M. Lim, S.-W. Sung, Y.-K. Lee, and J.-W. Kim, Technical？trends of hydrogen fuel cell railway rolling stock, 2018 Annual？Meeting and Autumn Conference of the Korean Society for？Railway, October 18-19, Jeju, Korea (2018).
C. Kim and S. Kim, Technology development trends for environmentally friendly hydrogen railway vehicles, Railw. J., 23, 15-20？(2020).
H. J. Ahn, S. H. Lee, N. Hur, M. K. Lee, and G. Yong, The numerical simulation of hydrogen jet diffusion for hydrogen leakage？in the enclosed geometry, J. Comput. Fluids Eng., 14, 32-38 (2009).
H. Xie, X. Li, and D. M. Christopher, Emergency blower ventilation to disperse hydrogen leaking from a hydrogen-fueled vehicle, Int. J. Hydrog. Energy, 40, 8230-8238 (2015).

상세보기
H. W. Ji, H. Lee, I. Hwang, and H. Jang, Safe ventilation methods？against leaks in hydrogen fuel cell rooms in homes, Energies, 15,？5434 (2022).

상세보기
M. R. Swain and M. N. Swain, Passive ventilation systems for the？safe use of hydrogen, Int. J. Hydrogen Energy, 21, 823-835？(1996).

상세보기
D. Lomot and Z. Karpinski, Hydrogen oxidation over alumina-supported palladium-nickel catalysts, Res. Chem. Intermed., 41,？9171-9179 (2015).

상세보기
D. Y. Lee and S. S. Kim, A Study on the H2 oxidation over？Pt/TiO2, SO2 poisoning and regeneration, Appl. Chem. Eng., 30,？731-736 (2019).
S. A. Singh, K. Vishwanath, and G. Madras, Role of hydrogen and？oxygen activation over Pt and Pd-doped composites for catalytic？hydrogen combustion, ACS Appl. Mater. Interfaces, 9, 19380-19388？(2017).

상세보기
Y. Jang, S. M. Lee, and S. S. Kim, Effect of a modified 13X zeolite support in Pd-based catalysts for hydrogen oxidation at room？temperature, RSC Adv., 11, 38047-38053 (2021).
Y. Jang, S. M. Lee, and S. S. Kim, A optimization study on the？preparation and coating conditions on honeycomb type of Pd/TiO 2 ？catalysts to secure hydrogen utilization process safety, J. Korea？Org. Resour. Recycl. Assoc., 29, 47-54 (2021).
H. Jouhara, N. Khordehgah, S. Almahmoud, B. Delpech, A.？Chauhan, and S. A. Tassou, Waste heat recovery technologies and？applications, Therm. Sci. Eng. Prog., 6, 268-289 (2018).
H. Eom, Y. Jang, S. Y. Choi, S. M. Lee, and S. S. Kim,？Application and regeneration of honeycomb-type catalysts for the？selective catalytic oxidation of H 2 S to sulfur from landfill gas,？Appl. Catal. A-Gen., 590, 117365 (2020).

상세보기
J. Lyer, T. Moore, D. Nguyen, P. Roy, and J. Stolaroff, Heat？transfer and pressure drop characteristics of heat exchangers based？on triply periodic minimal and periodic nodal surfaces, Appl.？Therm. Eng., 209, 118192 (2022).

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증