Hydrogen production with CO2 capture by coupling steam reforming of methane and chemical-looping combustion: Use of an iron-based waste product as oxygen carrier burning a PSA tail gas

Ortiz, Modesto; Gayán, Pilar; Diego, Luis F. de; Garcı́a-Labiano, F.; Pans, Miguel A.; Adánez, Juan

doi:10.1016/j.jpowsour.2010.09.101

Cited by 98 publications

(58 citation statements)

References 31 publications

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“…The similar reactivities found with this OC disagree with the ones obtained by Abad et al [11,19] who determined that the reactivity of a synthetic iron-based oxygen carrier was higher using H 2 or CO than the one obtained with CH 4 as a reducing gas. Also Leion et al [14] and Adánez et al [23] observed the same behaviour with ilmenite, a natural mineral mainly composed by iron and titanium and Ortiz et al [7] using an iron waste material. This fact revealed the improved CH 4 reactivity of this Fe-based impregnated OC compared to other Fe-based materials found in the literature.…”

Section: Reactivity In Tgamentioning

confidence: 61%

“…A net heat balance showed that the combustion of the PSA tail gas can provide the sufficient heat needed for the reforming reaction of methane [7]. To increase the heating value of the PSA tail gas, natural gas can be added.…”

Section: Introductionmentioning

confidence: 99%

“…However, very little research has been conducted about the performance of a CLC system using PSA tail gas as fuel. Ortiz et al [7] conducted a study on the behavior of an iron waste from aluminium manufacture, as an oxygen carrier for the SR-CLC process. The iron waste oxygen carrier was used in a 500 W th CLC unit to burn different kind of gas fuels such as PSA tail gas, syngas and CH 4 .…”

Section: Introductionmentioning

confidence: 99%

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Testing of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for a SR–CLC system in a continuous CLC unit

Gayán

Pans

Ortiz

et al. 2012

Fuel Processing Technology

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A Fe-based oxygen carrier was evaluated for H 2 production with CO 2 capture by coupling steam reforming of methane and chemical-looping combustion processes (SR-CLC). In this process hydrogen is obtained by conventional steam reforming of methane (SR), and the heat necessary to carry out the endothermic reformed reactions is supplied by a chemical-looping combustion (CLC) system with inherent CO 2 capture The tail gas from the PSA unit, a mixture of CH 4 , H 2 , CO and CO 2 , is used as fuel in the CLC system. The Fe-based oxygen carrier was made by incipient hot impregnation using Al 2 O 3 as support and was first characterized by TGA and batch fluidized bed reactor in order to determine the reactivity for CH 4 , CO and H 2 and the fluidization behaviour. The oxygen carrier behaviour with respect to gas combustion was evaluated in a continuous CLC unit using a simulated PSA off-gas stream as fuel. Methane was also used as fuel for

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Section: Reactivity In Tgamentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Testing of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for a SR–CLC system in a continuous CLC unit

Gayán

Pans

Ortiz

et al. 2012

Fuel Processing Technology

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“…The active material in the bauxite waste is Fe 2 O 3 and it is present mainly together with Al 2 O 3 . In previous studies by our research group, the behaviour of this bauxite waste for CLC with different gaseous fuels was analyzed [44]. The bauxite waste showed a good performance in the combustion of syngas [44].…”

Section: Introductionmentioning

confidence: 99%

Performance of a bauxite waste as oxygen-carrier for chemical-looping combustion using coal as fuel

Mendiara

Gayán

Abad

et al. 2013

Fuel Processing Technology

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In the recently developed Chemical-Looping Combustion (CLC) technology, the oxygen needed for the oxidation of the fuel is provided by an oxygen-carrier. Today, there is an increasing interest on CLC application to solid fuels, especially coal. One of the possibilities to process coal in a CLC system is the in situ gasification and subsequent combustion of the product gases (iG-CLC). Potential CLC oxygen-carriers should comply with some chemical and mechanical requirements but it would be interesting that the carrier is as inexpensive as possible, as some losses are expected accompanying the coal ashes. In the present work, a residue from alumina production mainly constituted by Fe 2 O 3 has been tested as oxygencarrier in CLC of coal. Batch experiments were carried out in a fluidized-bed reactor using a bituminous coal as fuel. The effect of operating conditions, such as temperature and gasification agent on the char conversion and combustion efficiency of gasification products were evaluated. Several H 2 O/CO 2 mixtures were tested as gasifying agents. After 50 hours of cycling operation in a batch fluidized bed, no defluidization or agglomeration problems were observed. A gain in the reactivity of the bauxite waste was observed with the number of redox cycles. The carrier showed high combustion efficiencies at all temperatures tested meaning that the bauxite waste was capable of burning the gases generated during the gasification of the char. The percentage of CO 2 in the feeding should be limited in order to maintain high gasification rates and combustion efficiencies. The present results indicate that this bauxite waste is a promising oxygen-carrier for the iG-CLC of coal.

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“…for combined chemical looping combustion and reforming, a tail gas mixture from a PSA unit. [13] With H2O re-oxidation, the produced hydrogen can directly be used in many applications, e. g. low temperature fuel cells. [14] On the other hand, using CO2 as re-oxidant leads to activation and utilization of CO2 at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen and Carbon Monoxide Production by Chemical Looping over Iron‐Aluminium Oxides

et al. 2015

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Hydrogen and carbon monoxide production from H2O and CO2 is experimentally investigated using a two-step chemical looping process based on redox cycles of iron-alumina mixed oxides. The reduction of Fe3O4 in first endothermic step is followed by splitting of CO2 or H2O in a second exothermic step. The iron-aluminum oxides are more reactive with H2O than with CO2 in the range 650-750 °C. In situ XRD shows that deactivation results from different processes: iron oxide sintering and formation of spinel (FeAl2O4) with lower oxygen storage capacity. However, FeAl2O4 also takes over the role of Al2O3 and mitigates the iron oxide sintering. Deactivation at 650 °C is predominantly governed by sintering, while further loss of activity is due to combined sintering and spinel formation. At 750 °C the spinel formation is more dominant. A mixed oxide of Fe2O3 and Al2O3 with mass ratio of 70:30 was found most active and stable for H2O and CO2 splitting in chemical looping.

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Hydrogen production with CO2 capture by coupling steam reforming of methane and chemical-looping combustion: Use of an iron-based waste product as oxygen carrier burning a PSA tail gas

Cited by 98 publications

References 31 publications

Testing of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for a SR–CLC system in a continuous CLC unit

Testing of a highly reactive impregnated Fe2O3/Al2O3 oxygen carrier for a SR–CLC system in a continuous CLC unit

Performance of a bauxite waste as oxygen-carrier for chemical-looping combustion using coal as fuel

Hydrogen and Carbon Monoxide Production by Chemical Looping over Iron‐Aluminium Oxides

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