Technical demonstration of the novel Fraunhofer ISE biomass gasification process for the production of a tar-free synthesis gas

Burhenne, Luisa; Rochlitz, L.; Lintner, Christian; Aicher, T.

doi:10.1016/j.fuproc.2012.10.012

Cited by 32 publications

(6 citation statements)

References 23 publications

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“…Researchers from Fraunhofer-Institute for Solar Energy Systems [376] developed a novel fixed-bed gasifier consisting of four independent zones (gasification and cracking of the tar, reduction and oxidation) separated by moving grates, which allow controlling the residence time in every zone. This novel technology was employed in the air gasification of biomass.…”

Section: Multi-staged Gasifiersmentioning

confidence: 99%

A comprehensive review of primary strategies for tar removal in biomass gasification

Cortazar

López

Álvarez

et al. 2023

Energy Conversion and Management

153

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Section: Multi-staged Gasifiersmentioning

confidence: 99%

A comprehensive review of primary strategies for tar removal in biomass gasification

Cortazar

López

Álvarez

et al. 2023

Energy Conversion and Management

153

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“…The maximum allowable tar concentration for most operations based on syngas is 50 mg/Nm 3 , although for some operations, this requirement is even lower. The perceived tar reductions will be evaluated based on this value.…”

Section: Introductionmentioning

confidence: 99%

Potassium-Salt-Catalyzed Tar Reduction during Pyrolysis Oil Gasification

Postma

Kersten

Rossum

2016

Ind. Eng. Chem. Res.

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The gasification of pinewood pyrolysis oil with potassium hydroxide dissolved was investigated, using a potassium salt loaded char as catalyst, to screen if this would result in a lower tar yield in the product stream. Experiments were performed at 700 °C, after which the product stream was thoroughly condensed and the gas stream was analyzed. The results show a significant tar reduction for a fixed potassium-loaded char bed at a gas hourly space velocity (G C1 HSV) of 237 h −1 . If the G C1 HSV is reduced, the reduction in tar increases. A reduction of a factor of 10 was observed when the feed was also loaded with 5 wt % KOH. Based on the principle that the potassium ion catalyzes the cracking of tars into char or gas, it is proposed that this formed char is easily and fully gasifiable, leading to a feasible, continuous low-tar pyrolysis oil gasification process. The results show promise of deep tar removal under more severe conditions, resulting in a much smaller tar removal step afterward. This process would fit well into the concept where lignocellulose residues are first locally pyrolyzed to pyrolysis oil, after which they will be collected and gasified at a low temperature, of ∼700 °C, on a large scale.

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“…The gas quality is comparable with the obtained in experiments with the optimized two stages gasifier, developed by Bentzen [25] (5 mg/ Nm 3 ), but with higher HHV. Burhenne et al [29] reported similar gas quality, with a minimum tar content of 10 mg/Nm 3 and HHV between 4.85 and 4.48 MJ/m 3 using a multi-staged gasification technology.…”

Section: Resultsmentioning

confidence: 90%

“…Fig. 6 compares the tar content in the producer gas obtained by several authors 19e35 mg/Nm 3 [26], 5 mg/Nm 3 [25], 97 mg/Nm 3 [27], 50 mg/Nm 3 [28] and 10 mg/Nm 3 [29]; with the content obtained in the studied reactor. The gas quality is comparable with the obtained in experiments with the optimized two stages gasifier, developed by Bentzen [25] (5 mg/ Nm 3 ), but with higher HHV.…”

Section: Resultsmentioning

confidence: 99%

Tar reduction in downdraft biomass gasifier using a primary method

et al. 2015

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a b s t r a c tThis work present a novel primary method, for tar reduction in downdraft gasification. The principle of this new technology is to change the fluid dynamic behaviour of the mixture, formed by pyrolysis product and gasification agent in combustion zone; allowing a homogeneous temperature distribution in radial direction in this reaction zone. To achieve the change in the fluid dynamic behaviour of the mixture; the entry of gasification agent to combustion zone is oriented by means of wall nozzles in order to form a swirl flow. This modification in combination with the extension of the reduction zone, will allow, to increases the efficiency of the tar thermal cracking inside the gasifier and the extension of the Boudouard reactions. Consequently, the quantity of tar passing through the combustion zone without cracking and the concentration of tar in the final gas, decrease significantly in relation with the common value obtained for this type of reactor, without affecting significantly the heating value of the producer gas. In this work is presented a new design for 15 kW downdraft gasification reactor, with this technology implemented, the tar content obtained in the experiments never overcome 10 mg/Nm 3 , with a lower heating value of 3.97 MJ/Nm 3 .

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Technical demonstration of the novel Fraunhofer ISE biomass gasification process for the production of a tar-free synthesis gas

Cited by 32 publications

References 23 publications

A comprehensive review of primary strategies for tar removal in biomass gasification

A comprehensive review of primary strategies for tar removal in biomass gasification

Potassium-Salt-Catalyzed Tar Reduction during Pyrolysis Oil Gasification

Tar reduction in downdraft biomass gasifier using a primary method

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