Influence of different bed material mixtures on dual fluidized bed steam gasification

Mauerhofer, Anna Magdalena; Benedikt, Florian; Schmid, Johannes Christian; Fuchs, Josef; Müller, Stefan; Hofbauer, H.

doi:10.1016/j.energy.2018.05.158

Cited by 59 publications

(31 citation statements)

References 14 publications

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“…To enable a comparison of these test campaigns with test campaigns, where pure steam was used as gasification agent, a ratio between P CR and P GR was calculated. For pure steam gasification test campaigns, a P CR /P GR ratio of around 0.5 is a typical value, but it depends on the type of fuel introduced into the GR as well as the operating parameters [8,28]. For the Fig.…”

Section: Validation Of Process Data With Ipsepromentioning

confidence: 99%

“…GC/MS tar concentrations of 8.5-9.0 g/m 3 stp,db and gravimetric tar concentrations between 4.1 and 5.8 g/m 3 stp,db were generated. For pure steam gasification of SW with olivine as bed material presented in [28], tar concentrations of 11.2 g/m 3 stp,db and 6.7 g/m 3 stp,db were generated. Hence, the tar contents of the presented test campaigns displayed in Fig.…”

Section: Tar Evolution Of Different Biogenic Fuelsmentioning

confidence: 99%

“…As shown in Table 3, for test campaigns 3, 4 and 5, limestone was added to olivine as bed material. Typically, for pure steam gasification test campaigns, tar concentrations decreased when a catalytically active bed material like limestone was added [28,30]. However, this effect was not observed for test campaigns 3 and 5.…”

Section: Tar Evolution Of Different Biogenic Fuelsmentioning

confidence: 99%

“…Lower part of the 100 kW th gasification pilot plant, TU Wien[28] Fig. 3Upper part of the 100 kW th gasification pilot plant, TU Wien[28] …”

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confidence: 99%

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CO2 gasification of biogenic fuels in a dual fluidized bed reactor system

Mauerhofer

Müller

Benedikt

et al. 2019

Biomass Conv. Bioref.

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A 100 kW th dual fluidized bed steam gasification pilot plant has been developed at TU Wien to convert different types of biogenic fuels into a valuable product gas. In this paper, the conversion of different biogenic fuels in combination with the utilization of CO 2 as alternative gasification agent was investigated in the mentioned pilot plant. For this purpose, five experimental campaigns were carried out aiming at the investigation of softwood as reference fuel, and rapeseed cake, bark and lignin as alternative fuels. Pure olivine as well as a mixture (90/10 wt%) of olivine and limestone were used as bed materials. The product gas compositions of the different biogenic fuels changed depending on the elemental composition of the biogenic fuels. Thus, a high amount of carbon in the fuel enhanced CO formation, whereas an increased content of oxygen led to higher CO 2 contents. Additionally, the presence of alkali metals in the biomass ash favoured the production of CO. The addition of limestone enhanced the H 2 and CO contents via the water gas shift reaction as well as steam and dry reforming reactions, but had no significant effect on tar contents. Overall, this paper presents the feasibility of the dual-fluidized bed gasification process of different biogenic fuels with CO 2 as gasification agent. Keywords CO 2 gasification. Biomass. Biogenic residue. 100 kW th pilot plant. CO 2 conversion. Hydrogen balance

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Section: Validation Of Process Data With Ipsepromentioning

confidence: 99%

Section: Tar Evolution Of Different Biogenic Fuelsmentioning

confidence: 99%

Section: Tar Evolution Of Different Biogenic Fuelsmentioning

confidence: 99%

“…Lower part of the 100 kW th gasification pilot plant, TU Wien[28] Fig. 3Upper part of the 100 kW th gasification pilot plant, TU Wien[28] …”

mentioning

confidence: 99%

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CO2 gasification of biogenic fuels in a dual fluidized bed reactor system

Mauerhofer

Müller

Benedikt

et al. 2019

Biomass Conv. Bioref.

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“…Mauerhofer et al tested K-feldspar (0.87 kg kg −1 K-feldspar, 0.07 kg kg −1 Na-feldspar) as a bed material for DFB steam gasification and observed a low catalytic activity, compared to olivine and calcite [40]. Selective tests of the catalytic activity showed no activity regarding the WGS reaction [25] and tar reduction [41], though it was possible to observe an activation over time during DFB steam gasification with an ash-rich fuel mixture of bark, straw, and chicken manure [24].…”

Section: Introductionmentioning

confidence: 99%

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

Fürsatz

Kuba

Janisch

et al. 2020

Biomass Conv. Bioref.

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Interaction of biomass ash and bed materials in thermochemical conversion in fluidized beds leads to changes of the bed particle surface due to ash layer formation. Ash components present on the bed particle surface strongly depend on the ash composition of the fuel. Thus, the residual biomass used has a strong influence on the surface changes on bed particles in fluidized bed conversion processes and, therefore, on the catalytic performance of the bed material layers. Ash layer formation is associated with an increase in the catalytic activity of the bed particles in gasification and plays a key role in the operability of different biomass fuels. The catalytic activation over time was observed for K-feldspar used as the bed material with bark, chicken manure, and a mixture of bark and chicken manure as fuels. The changes on the bed material surfaces were further characterized by SEM/ EDS and BET analyses. Raman, XPS, and XRD analyses were used to characterize the crystal phases on the bed material surface. An increase in surface area over time was observed for K-feldspar during the interaction with biomass ash. Additionally, a more inhomogeneous surface composition for fuels containing chicken manure in comparison to pure bark was observed. This was due to the active participation of phosphorus from the fuel ash in the ash transformation reactions leading to their presence on the particle surface. A decreased catalytic activity was observed for the same BET surface area compared to bark combustion, caused by the different fuel ash composition of chicken manure.

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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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Influence of different bed material mixtures on dual fluidized bed steam gasification

Cited by 59 publications

References 14 publications

CO2 gasification of biogenic fuels in a dual fluidized bed reactor system

CO2 gasification of biogenic fuels in a dual fluidized bed reactor system

Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction

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

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