Fate of sulfur in chemical looping combustion of gaseous fuels using a Perovskite oxygen carrier

Pachler, Robert F.; Penthor, Stefan; Mayer, Karl; Hofbauer, Hermann

doi:10.1016/j.fuel.2018.12.054

Cited by 30 publications

(18 citation statements)

References 37 publications

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“…Furthermore, different materials were screened in batch testing, and operational tests were conducted in CLC units with 300 W and 10 kW nominal fuel input, respectively, the results of which are presented here. Further operational studies were made in a differently designed 10 kW unit and a 120 kW CLC unit, including investigations of ageing and sulfur tolerance . Ultimately, experiments on a pilot scale, i.e., in a continuous reactor with nominal fuel input of 1 MW, were conducted .…”

Section: Introductionmentioning

confidence: 99%

Oxygen‐Carrier Development of Calcium Manganite–Based Materials with Perovskite Structure for Chemical‐Looping Combustion of Methane

et al. 2020

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The present work is related to the upscaling of calcium manganite–based oxygen‐carrier materials, which have a perovskite structure, both with respect to the use of inexpensive raw materials, i.e., instead of pure chemicals, and the upscaling of production to multitonne batches. Results are presented from the two different stages of material development, i.e., raw material selection and upscaling. The evaluation involves both operation in chemical‐looping combustor units of 300 W and 10 kW, and material characterization. In the latter unit, the gas velocities in the riser and in the grid‐jet zone of the gas distributor come close to gas velocities of industrial‐scale units and, therefore, this unit is also used to assess particle lifetime. Results from the various chemical‐looping combustion units and oxygen‐carrier materials produced from various raw materials of both high and low purity show that very high degrees of fuel conversion can be reached while achieving very high oxygen‐carrier lifetimes. The composition of the oxygen‐carrier materials seems robust and flexible with respect to the precursors used in its manufacturing.

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Section: Introductionmentioning

confidence: 99%

Oxygen‐Carrier Development of Calcium Manganite–Based Materials with Perovskite Structure for Chemical‐Looping Combustion of Methane

et al. 2020

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“…[167,168] For example, CaMnO 3 -based perovskites, namely CaMn 0.875 Ti 0.125 O 3 , CaMn 0.9 Mg 0.1 O 3-δ , and CaMn 0.775 Ti 0.125 Mg 0.1 O 3-δ have been employed extensively for chemical looping combustion, over a wide range of operational scales, namely from 300 Wth up to 1 MWth. [115,[169][170][171][172][173][174][175][176] A lifetime of several thousand hours was recorded, together with a small mass loss due to attrition and elutriation. [172] For LaNi x Fe 1-x O 3 perovskite oxygen carriers, tuning the Fe to Ni could result in optimal CLBP performance over repeated redox cycles.…”

Section: Mixed Oxidesmentioning

confidence: 99%

“…[166] Also, practical issues associated with the use of biomass, including i) the interaction between the OC and the biomass ashes and ii) chemical deactivation by sulfur contamination when using fuels with high sulfur contents, must be addressed. [179] Pachler et al [175] reported the formation of crystalline MgS and significant deactivation of the CaMn 0.775 Mg 0.1 Ti 0,125 O 3-δ OC, when H 2 S impurity was present in the fuel. Phosphorus-containing compounds in the biomass are also found to be detrimental to the performance of brownmillerite OCs (a type of perovskite), owing to the OC-ash interaction and the formation of calcium phosphate (Ca 5 HO 13 P 3 ).…”

Section: Mixed Oxidesmentioning

confidence: 99%

“…[ 179 ] Pachler et al. [ 175 ] reported the formation of crystalline MgS and significant deactivation of the CaMn 0.775 Mg 0.1 Ti 0,125 O 3– δ OC, when H 2 S impurity was present in the fuel. Phosphorus‐containing compounds in the biomass are also found to be detrimental to the performance of brownmillerite OCs (a type of perovskite), owing to the OC‐ash interaction and the formation of calcium phosphate (Ca 5 HO 13 P 3 ).…”

Section: Overview Of Oxygen Carriersmentioning

confidence: 99%

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Developing Oxygen Carriers for Chemical Looping Biomass Processing: Challenges and Opportunities

Zhou

Luo

et al. 2020

Advanced Sustainable Systems

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of global average temperature to within 2 °C compared to pre-industrial era, [2] it is necessary to rapidly reduce our reliance on fossil fuels. To this end, tremendous efforts have been put in to ramp up the capacities of renewable energy generation, including solar, wind, hydro, geothermal, tidal, etc. [3] However, non-biological renewables are available intermittenty, location-specific, and require costly infra

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“…However, the Fe–Ti ore has been shown to a have low conversion rate, as well as rapid loss of oxygen-carrying capacity due to Fe migration to the external surface and attrition . Ca–Mn-based perovskites with doping (Mg, Ti) are promising candidates as well, with good stability and reaction rates which have been shown to increase with cycling. − The drawbacks of these perovskites are deactivation from sulfur impurities and low oxygen transport capacities of <0.01 g of O 2 /g of OC . CuO has been selected in the present study for the following qualities:…”

Section: Introductionmentioning

confidence: 99%

Scalable Preparation of Bimetallic Cu/Ni-Based Oxygen Carriers for Chemical Looping

et al. 2020

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Chemical looping is a promising combustion technology utilizing the cyclic oxidation and reduction of a metal oxide to transport oxygen for a variety of applications related to carbon capture and storage (CCS). The scalable manufacture of a suitable oxygen carrier is a pivotal aspect of this research field. This work surveys the experimental preparation of CuO and CuO/NiO on SiC and SiO2 substrates for chemical looping with oxygen uncoupling (CLOU) applications. A novel impregnation method that enhances the metal–support interaction to increase dispersion and reduce CuO sintering has been developed in this work. Particles prepared using this method, termed “selective adsorption wet coimpregnation”, exhibited agglomeration resistance and high reactivity over many regeneration cycles. CuO/NiO@SiO2 oxygen carrier (33 wt % CuO, 1 mol of Ni/99 mol of Cu) showed no signs of agglomeration up to 975 °C in fluidized bed testing, cycling between CuO and Cu2O. Thermogravimetric analysis showed no loss in oxygen transport capacity or decrease in kinetics over 100 cycles.

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Fate of sulfur in chemical looping combustion of gaseous fuels using a Perovskite oxygen carrier

Cited by 30 publications

References 37 publications

Oxygen‐Carrier Development of Calcium Manganite–Based Materials with Perovskite Structure for Chemical‐Looping Combustion of Methane

Oxygen‐Carrier Development of Calcium Manganite–Based Materials with Perovskite Structure for Chemical‐Looping Combustion of Methane

Developing Oxygen Carriers for Chemical Looping Biomass Processing: Challenges and Opportunities

Scalable Preparation of Bimetallic Cu/Ni-Based Oxygen Carriers for Chemical Looping

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