Experimental investigation of chemical-looping hydrogen generation using Al 2 O 3 or TiO 2 -supported iron oxides in a batch fluidized bed

Chen, Shiyi; Shi, Qiliang; Zhang, Xue; Sun, Xiaoyan; Xiang, Wenguo

doi:10.1016/j.ijhydene.2011.04.204

Cited by 107 publications

(56 citation statements)

References 48 publications

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“…The study discuses in detail the methodology used to evaluate the performances using critical design factors such as, gasifier feeding system, heat and power integration analysis and potential ways to increase the overall energy efficiency. A few experimental studies have also been performed in order to determine the appropriate OC and the steam conversion rate [19,20]. All these studies are based on combinations of power plant arrangements, fuels and OCs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hydrogen generation in a three reactor chemical looping reforming process

Khan

Shamim

2016

Applied Energy

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Section: Introductionmentioning

confidence: 99%

Investigation of hydrogen generation in a three reactor chemical looping reforming process

Khan

Shamim

2016

Applied Energy

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“…Further, dynamic modeling study of moving bed reactors have been carried out to reveal the inert characteristics of the reactors [19e21]. Meanwhile, fluidized bed reactors commonly used in chemical looping combustion (CLC) showed some limitations for deep reduction of iron oxides when fuel conversion was high [10,22,23]. Xiang and Xue et al [24,25] suggested a compact fluidized bed reactor system as the reducer which was consisting of a bubble fluidized bed, a riser, a cyclone and a dipleg to solve this disadvantage.…”

Section: Introductionmentioning

confidence: 99%

Phase distribution and stepwise kinetics of iron oxides reduction during chemical looping hydrogen generation in a packed bed reactor

Zhu

Wang

Hua

et al. 2015

International Journal of Hydrogen Energy

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“…Because hydrogen is the major compound of synthesis gas (syngas) from the biomass/coal gasification process, hydrogen was therefore utilized as a fuel in CLC testing [1,2]. Five cycles of reduction-oxidation TG data were obtained for the SrCuO 2 oxygen carrier at the 600-800°C temperature range, shown in Fig.…”

Section: Stability Of Cyclic Combustion and Regeneration Clc Reactionsmentioning

confidence: 99%

“…In the fuel reactor, fuel (for example, methane, synthesis gas, coal, biomass) reacts with a solidstate oxygen carrier. In consequence, the fuel is oxidized to CO 2 and H 2 O [2], while the metal oxide is reduced to the metal oxide at a lower oxidation state or to its metallic form. After the water condensation, a pure stream of CO 2 in fuel reactor is obtained.…”

Section: Introductionmentioning

confidence: 99%

Examining SrCuO2 as an oxygen carrier for chemical looping combustion

Ksepko

2015

J Therm Anal Calorim

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This paper contains the results of research work on chemical looping combustion (CLC). CLC is one of the most promising combustion technologies and has the main advantage of producing a concentrated CO 2 stream, which is obtained after water condensation without any energy penalty for CO 2 separation. The objective of this work was to study the chemical looping reaction performance for a novel spinel-type oxygen carrier. The SrCuO 2 was tested for the purpose of CLC for power generation, and hydrogen was utilized as a syngas component. SrCuO 2 was prepared as a powder. Reactivity tests were performed under isothermal conditions for multiple redox cycles using a thermogravimetric (TG) analyzer (Netzsch STA 409 PG Luxx). For the reduction, 3 % H 2 was used, and for the oxidation cycle, air was used. The effect of both reaction temperature (600-800°C) and reducing/oxidizing cycles (five cycles at each temperature) on the reaction performance of the oxygen carrier samples developed in this study was evaluated. The stability, oxygen transport capacity and reaction rates were analyzed based on experimental TG data. The material was systematically investigated by scanning electron microscopy, X-ray diffraction measurements, N 2 porosimetry, particle size distribution and studying the melting behavior. Investigation of the oxidation/reduction behavior of SrCuO 2 showed stable chemical looping performance, with great recyclability after continuous multiple redox reactions maintaining the chemical properties. Moreover, excellent oxygen capacity was maintained within cycling combustion tests.Furthermore, the oxygen carrier sample attained a high melting temperature, which provides attractive thermal resistivity. For comparison purposes, another Cu-based oxygen carrier was prepared and analyzed in the same manner. The CuO/TiO 2 carrier transported similar amounts of oxygen to the fuel, but its stability to reaction was questionable. The promising results obtained from CLC allowed us to conclude that SrCuO 2 is possibly a capable and suitable candidate for CLC for power generation.

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Experimental investigation of chemical-looping hydrogen generation using Al 2 O 3 or TiO 2 -supported iron oxides in a batch fluidized bed

Cited by 107 publications

References 48 publications

Investigation of hydrogen generation in a three reactor chemical looping reforming process

Investigation of hydrogen generation in a three reactor chemical looping reforming process

Phase distribution and stepwise kinetics of iron oxides reduction during chemical looping hydrogen generation in a packed bed reactor

Examining SrCuO2 as an oxygen carrier for chemical looping combustion

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