Three-reactors chemical looping process for hydrogen production

Chiesa, Paolo; Lozza, Giovanni; Malandrino, Alberto; Romano, Matteo Carmelo; Piccolo, Vincenzo

doi:10.1016/j.ijhydene.2008.02.032

Cited by 218 publications

(124 citation statements)

References 13 publications

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“…Similarly, Chiesa et al [98] proposed a CLH production system with three reactors. The conceptual scheme of the three reactor of CLH is shown in Figure 7.…”

Section: Chemical-looping Reforming (Clr) and Chemical-looping Hydrogmentioning

confidence: 99%

Advancements in Development of Chemical-Looping Combustion: A Review

Zhao

2009

International Journal of Chemical Engineering

132

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Chemical-looping combustion (CLC) is a novel combustion technology with inherent separation of greenhouse CO 2 . Extensive research has been performed on CLC in the last decade with respect to oxygen carrier development, reaction kinetics, reactor design, system efficiencies, and prototype testing. Transition metal oxides, such as Ni, Fe, Cu, and Mn oxides, were reported as reactive species in the oxygen carrier particles. Ni-based oxygen carriers exhibited the best reactivity and stability during multiredox cycles. The performance of the oxygen carriers can be improved by changing preparation method or by making mixedoxides. The CLC has been demonstrated successfully in continuously operated prototype reactors based on interconnected fluidizedbed system in the size range of 0.3-50 kW. High fuel conversion rates and almost 100% CO 2 capture efficiencies were obtained. The CLC system with two interconnected fluidized-bed reactors was considered the most suitable reactor design. Development of oxygen carriers with excellent reactivity and stability is still one of the challenges for CLC in the near future. Experiences of building and operating the large-scale CLC systems are needed before this technology is used commercially. Chemical-looping reforming (CLR) and chemical-looping hydrogen (CLH) are novel chemical-looping techniques to produce synthesis gas and hydrogen deserving more attention and research.

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“…Similarly, Chiesa et al [98] proposed a CLH production system with three reactors. The conceptual scheme of the three reactor of CLH is shown in Figure 7.…”

Section: Chemical-looping Reforming (Clr) and Chemical-looping Hydrogmentioning

confidence: 99%

Advancements in Development of Chemical-Looping Combustion: A Review

Zhao

2009

International Journal of Chemical Engineering

132

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“…As mentioned earlier, the thermodynamic model was validated from the data available in the literature [8]. The results show that the endothermic reaction in the FR forms the products namely CO 2 , H 2 O, H 2 , CO, N 2 and traces of CH 4 while the highly exothermic reaction in the AR gives out argon, CO 2 In the FR, the temperature difference between the Fe-based and W-based plants is about 125 K, whereas, in the SR and the AR, the temperature differences are about 131 K and 156 K, respectively, as shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…is supplied to ensure full conversion of fuel in the FR. The excess amount is usually 2% of the total flow rate [8]. Hence, the effect of excess OC is insignificant on the plant performance.…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

Comparison of Iron and Tungsten Based Oxygen Carriers for Hydrogen Production Using Chemical Looping Reforming

Khan

Shamim

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract.Hydrogen production by using a three reactor chemical looping reforming (TRCLR) technology is an innovative and attractive process. Fossil fuels such as methane are the feedstocks used. This process is similar to a conventional steam-methane reforming but occurs in three steps utilizing an oxygen carrier. As the oxygen carrier plays an important role, its selection should be done carefully. In this study, two oxygen carrier materials of base metal iron (Fe) and tungsten (W) are analysed using a thermodynamic model of a three reactor chemical looping reforming plant in Aspen plus. The results indicate that iron oxide has moderate oxygen carrying capacity and is cheaper since it is abundantly available. In terms of hydrogen production efficiency, tungsten oxide gives 4% better efficiency than iron oxide. While in terms of electrical power efficiency, iron oxide gives 4.6% better results than tungsten oxide. Overall, a TRCLR system with iron oxide is 2.6% more efficient and is cost effective than the TRCLR system with tungsten oxide.

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“…The reactors chemical looping adopted here is a three-reactor system previously proposed for CLHG from methane [16] and from syngas [14]. It is based in a cycle of reduction-oxidation of iron oxides.…”

Section: Clhg Reactorsmentioning

confidence: 99%

“…[14] explores the case with syngas as fuel and [16] the case of methane. We refer to this option as extra-firing.…”

Section: Extra-firingmentioning

confidence: 99%

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Álvaro

Montesino

Orgaz

et al. 2017

Energy

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Chemical-looping hydrogen generation (CLHG) is a chemical-looping combustion variant that allows simultaneous production of power and hydrogen. A thermodynamic analysis from the exergy method point of view of an integrated syngas-fueled CLHG cycle is carried out with the aim of contributing to the conceptual understanding and development of CLHG systems. The cycle working point is optimized in a range of conditions. The proposed system shows a very interesting potential for power, hydrogen and process heating coproduction with high efficiency.

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Three-reactors chemical looping process for hydrogen production

Cited by 218 publications

References 13 publications

Advancements in Development of Chemical-Looping Combustion: A Review

Advancements in Development of Chemical-Looping Combustion: A Review

Comparison of Iron and Tungsten Based Oxygen Carriers for Hydrogen Production Using Chemical Looping Reforming

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

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