COMPARISON OF NUCLEAR HYDROGEN PRODUCTION BETWEEN SULFUR-IODINE CYCLE OF THERMOCHEMICAL AND NATURAL GAS STEAM REFORMING PROCESS
Djati H. Salimy, Ida N. Finahari
Pusat Pengembangan Energi Nuklir (PPEN) BATAN
Jl. Abdul Rohim Kuningan Barat, Mampang Prapatan
ABSTRACT
COMPARISON OF NUCLEAR HYDROGEN PRODUCTION BETWEEN SULFUR-IODINE CYCLE OF THERMOCHEMICAL AND NATURAL GAS STEAM REFORMING PROCESS. Paper describes comparison of nuclear hydrogen production for two technology processes: thermochemical of sulfur-iodine cycle and steam reforming of natural gas. The goal of the study is to understanding production characteristic of each processes. The comparison is analyzed from the point of advantages and disadvantages, thermal efficiency, and technology statues. Steam reforming of natural gas is the proven technology, while thermochemical process is still in the stage of research and development. Thermal efficiency of steam reforming (70-76%) is about three time of electrolysis (47-52%). Preliminary estimation of production cost also showed that steam reforming is cheaper. However, from the point of raw material, thermochemical is more advantage since the unlimited and renewable raw material of water, promising the process of hydrogen production without CO2 emission. While, steam reforming depend on non renewable raw material of natural gas. For nuclear application, test production of nuclear steam reforming has been going on since the mid of 2010 and will soon be operated by 2015. Couple thermochemical process with nuclear, will conducted in the end of 2010, hope be operated by 2025. For commercial operation both of the processes still wait the commercialization of HTGR.
Keywords: steam reforming, thermochemical, thermal efficiency, HTGR
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR II 2009", Jakarta, 25 Juni 2009.
THE ASSESSMENT OF THERMODYNAMIC MODEL FOR HYDROGEN PRODUCTION BY IS THERMOCHEMICAL CYCLE
Itjeu Karliana
Pusat Teknologi Reaktor dan Keselamatan Nuklir (PTKRN) - BATAN
Kawasan PUSPIPTEK Gd. 80, Serpong, Tangerang, 15310
ABSTRACT
THE ASSESSMENT OF THERMODYNAMIC MODEL FOR HYDROGEN PRODUCTION BY IS THERMOCHEMICAL CYCLE. Thermodynamic model for hydrogen production by I-S thermochemical cycle has been studied on the Bunsen reaction. The alternative energy resource of hydrogen which water splitting is promising to produce hydrogen because it has efficient energy, environment acceptable, and competitive cost operation compared to fossil energy or renewable energy resources. For commercial scale of hydrogen production through the I-S thermochemical cycle as the aim of others. In this cycle, iodine and sulfur dioxide mixture with water forming iodide acid and sulfuric acid. Both phases to form two separated section, H2SO4: [H2SO4 + H2O]l at the upper layer and HIx : [2HI]g + [(x-1)I2]l + [H2O]l at the bottom. In the separation process known several factor has been problems, for instances: HI extraction from HIx mixture because azeotropic mixing within HIx section, solidification of iodine, and heterogenous H2O-HI-I2 ternery mixtures. In this paper are described thermodynamic model on the hydrogen production by I-S thermochemical cycle using ZRP/EoS/Gex and PR/MHV2/UNSolv combined with activity coefficient and Engel�s salvation model. The goal of assessment is to evaluate equilibrium system in HIx region of HIx : [2HI]g + [(x-1)I2]l + [H2O]l due too many dissolved fractions. From this assessment that thermodynamic model can explain the equilibrium of liquid-liquid phase and vapor-liquid phase in HIx mixture solution.
Keywords: Thermodynamic model, hydrogen production, thermochemical.
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR II 2009", Jakarta, 25 Juni 2009.
