Advanced dual fluidized bed steam gasification of wood and lignite with calcite as bed material

Benedikt, Florian; Fuchs, Josef; Schmid, Johannes Christian; Müller, Stefan; Hofbauer, Hermann

doi:10.1007/s11814-017-0141-y

Cited by 55 publications

(19 citation statements)

References 8 publications

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“…This PLC continuously records all important flow rates, pressures, temperatures, etc., as well as the main product gas components. Detailed descriptions of the measurement devices and control technology can be found in literature [38,46,47]. Figure 13 (modified from [47]) shows an overview of the important gas measurement equipment for the online control of process parameters.…”

Section: Online Measurement Equipmentmentioning

confidence: 99%

“…By the use of process simulation, the following performance indicating key figures are calculated, which were also used in previous works on the advanced DFB steam gasification pilot plant by Benedikt et al [46] and Müller et al [61]. The steam-to-fuel ratio φ SF yields the ratio of the amount of total steam from fluidization and fuel water to that of dry and ash-free fuel fed into the GR, as given by Eq.…”

Section: Process Simulation Via Ipsepro and Calculation Of Key Figuresmentioning

confidence: 99%

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Syngas for biorefineries from thermochemical gasification of lignocellulosic fuels and residues—5 years’ experience with an advanced dual fluidized bed gasifier design

Schmid

Benedikt

Fuchs

et al. 2019

Biomass Conv. Bioref.

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In many processes proposed for biorefineries, recycling procedures, and industrial or agricultural production processes, residue is generated which could be further transformed by thermochemical conversion via gasification. The technology of dual fluidized bed steam gasification is capable of producing a valuable product gas out of such residue. The generated nitrogen-free product gas can be used for heat and power production and is suitable for separating gases (e.g. hydrogen). However, if the product gas is cleaned, its use as syngas is more beneficial for manufacturing renewable chemical substances, like synthetic natural gas, methanol, Fischer-Tropsch liquids, or mixed alcohols. This paper presents the results of experimental research from gasification test runs of different biogenic fuels, carried out with an advanced 100 kW pilot plant over the last 5 years at TU Wien. The focus is to provide an overview of measured results validated by mass and energy balances and to present key calculated performance indicating key figures of the test runs. In this way, the influence of various operational parameters and the composition of the product gas are evaluated. The presented results form the basis for the proper design of suitable gas-cleaning equipment. Subsequently, the clean syngas is available for several synthesis applications in future biorefineries.

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Section: Online Measurement Equipmentmentioning

confidence: 99%

Section: Process Simulation Via Ipsepro and Calculation Of Key Figuresmentioning

confidence: 99%

Syngas for biorefineries from thermochemical gasification of lignocellulosic fuels and residues—5 years’ experience with an advanced dual fluidized bed gasifier design

Schmid

Benedikt

Fuchs

et al. 2019

Biomass Conv. Bioref.

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“…The removal of coarse ash is particularly important, when ash-rich fuels are used for gasification [29]. More information about the DFB gasification system can be found in [24,30].…”

Section: Dfb Co 2 /Steam Gasification Reactor Systemmentioning

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%

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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“…The manufacturing of gaseous biofuels may be accomplished through a variety of upcycling processes. These upcycling processes can utilize organic waste from biogas plants (Sasse 1988), gasification of biomass (Benedikt et al 2017; Mauerhofer et al 2018), dark fermentation of organic biomass from agricultural residues, agro-industrial and organic municipal wastes (Ghimire et al 2015), or the recycling of CO 2 . In the context of upcycling processes (biological), H 2 production is also of ecological and biotechnological interest.…”

Section: Introductionmentioning

confidence: 99%

Physiology and methane productivity of Methanobacterium thermaggregans

Mauerhofer

Reischl

Schmider

et al. 2018

Appl Microbiol Biotechnol

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Accumulation of carbon dioxide (CO2), associated with global temperature rise, and drastically decreasing fossil fuels necessitate the development of improved renewable and sustainable energy production processes. A possible route for CO2 recycling is to employ autotrophic and hydrogenotrophic methanogens for CO2-based biological methane (CH4) production (CO2-BMP). In this study, the physiology and productivity of Methanobacterium thermaggregans was investigated in fed-batch cultivation mode. It is shown that M. thermaggregans can be reproducibly adapted to high agitation speeds for an improved CH4 productivity. Moreover, inoculum size, sulfide feeding, pH, and temperature were optimized. Optimization of growth and CH4 productivity revealed that M. thermaggregans is a slightly alkaliphilic and thermophilic methanogen. Hitherto, it was only possible to grow seven autotrophic, hydrogenotrophic methanogenic strains in fed-batch cultivation mode. Here, we show that after a series of optimization and growth improvement attempts another methanogen, M. thermaggregas could be adapted to be grown in fed-batch cultivation mode to cell densities of up to 1.56 g L−1. Moreover, the CH4 evolution rate (MER) of M. thermaggregans was compared to Methanothermobacter marburgensis, the CO2-BMP model organism. Under optimized cultivation conditions, a maximum MER of 96.1 ± 10.9 mmol L−1 h−1 was obtained with M. thermaggregans—97% of the maximum MER that was obtained utilizing M. marburgensis in a reference experiment. Therefore, M. thermaggregans can be regarded as a CH4 cell factory highly suited to be applicable for CO2-BMP.Electronic supplementary materialThe online version of this article (10.1007/s00253-018-9183-2) contains supplementary material, which is available to authorized users.

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Advanced dual fluidized bed steam gasification of wood and lignite with calcite as bed material

Cited by 55 publications

References 8 publications

Syngas for biorefineries from thermochemical gasification of lignocellulosic fuels and residues—5 years’ experience with an advanced dual fluidized bed gasifier design

Syngas for biorefineries from thermochemical gasification of lignocellulosic fuels and residues—5 years’ experience with an advanced dual fluidized bed gasifier design

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

Physiology and methane productivity of Methanobacterium thermaggregans

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